family intervention effects on co-occurring behavior and...

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MANUSCRIPT UNDER REVIEW: Journal of Abnormal Child Psychology Unauthorized reproduction of this article is prohibited. Emotional and behavioral difficulties are common concerns that parents have about their young chil- dren. A large body of research has indicated that emotional difficulties, including anxiety and depres- sion, and behavioral problems, including aggression and oppositionality, tend to be relatively stable across childhood (Briggs-Gowan, Carter, Bosson-Heenan, Guyer, & Horwitz, 2006). For instance, studies have consistently documented the developmental conti- nuity of conduct problems from early childhood to antisocial behavior in middle childhood and ado- lescence (Brook, Whiteman, & Finch, 1992; Brook, Whiteman, Gordon, & Cohen, 1986; Campbell, Shaw, & Gilliom, 2000; Caspi, Moffitt, Newman, & Silva, 1998; Hawkins, Lishner, Catalano, & Howard, 1986; Lyons-Ruth, Zeneah, & Benoit, 1996; Shaw, Gilliom, Ingolsby, & Nagin, 2003; Vicary & Lerner, 1983). Sim- ilarly, modest continuity has been found for internal- izing symptoms, in that youth exhibiting problems with anxiety and depression in early childhood are likely to continue to exhibit those problems into middle childhood and adolescence (Briggs-Gowan et al., 2006; Briggs-Gowan, Carter, Irwin, Wachtel, & Family Intervention Effects on Co-occurring Behavior and Emotional Problems in Early Childhood: A Latent Transition Analysis Approach ARIN CONNELL, BERNADETTE MARIE BULLOCK, THOMAS J. DISHION, DANIEL SHAW, MELVIN WILSON, FRANCES GARDNER ABSTRACT This study used latent transition analysis (LTA) to examine changes in early emotional and behavioral problems in children age 2 to 4 years relative to participation in a family-centered intervention. A sample of 731 economically disadvantaged families were recruited from among participants in a national food supplement and nutrition program. Families with toddlers between age 2 and 3 were randomized either to the Family Check-Up (FCU) or to a nonintervention control group. The FCU’s linked interventions were tailored and adapted to each family’s needs. Assessment occurred at age 2, 3, and 4. The FCU followed age 2 and age 3 assessments. On the basis of mothers’ reports relevant to the Child Behavior Checklist, latent class analyses were used to study children’s transitions across the following four groups from age 2 to age 4: (a) externalizing only, (b) internalizing only, (c) comor- bid internalizing and externalizing, and (d) normative. LTA results revealed that participation in the FCU decreased the likelihood of transitions into the comorbid and internalizing-only class at age 4, relative to the normative no-elevation class. These results are discussed with respect to changes in Cicchetti, 2004; Warren, Huston, Egeland, & Sroufe, 1997). Early emotional and behavioral difficulties may also predict the emergence of problems in other impor- tant domains of functioning, including academic and social difficulties, into adolescence. For instance, lon- gitudinal studies with children as young as age 3 years (e.g., Caspi et al., 1998; Shaw & Gross, in press) have revealed associations between early behavior prob- lems and long-term profiles of risk, including sub- stance dependence in adolescence and young adult- hood. Research has documented similar long-term outcomes associated with internalizing problems, including impairments in social, academic, and pro- fessional functioning (e.g., Fombonne, Wostear, Coo- per, Harrington, & Rutter, 2001; Lewinsohn, Rohde, Seeley, Klein, & Gotlib, 2003). Emotional and behavioral difficulties tend to co- occur in childhood at a higher rate than would be expected by chance (Angold, Costello, & Erkanli, 1999; Lewinsohn, Rohde, & Seeley, 1995). Children who exhibit co-occurring emotional and behavioral difficulties tend to show more severe impairment

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Page 1: Family Intervention Effects on Co-occurring Behavior and ...ppcl/ESP_Publications/ConnellBullockDishion etal.pdfsuggests that children with co-occurring emotional and behavioral disturbances

MANUSCRIPT UNDER REVIEW : Journal of Abnormal Child Psychology �Unauthorized reproduction of this article is prohibited.

LATENTTRANSITIONANALYSIS

Emotionalandbehavioraldifficultiesarecommonconcernsthatparentshaveabouttheiryoungchil-dren.Alargebodyofresearchhasindicatedthatemotionaldifficulties,includinganxietyanddepres-sion,andbehavioralproblems,includingaggressionandoppositionality,tendtoberelativelystableacrosschildhood(Briggs-Gowan,Carter,Bosson-Heenan,Guyer,&Horwitz,2006).Forinstance,studieshaveconsistentlydocumentedthedevelopmentalconti-nuityofconductproblemsfromearlychildhoodtoantisocialbehaviorinmiddlechildhoodandado-lescence(Brook,Whiteman,&Finch,1992;Brook,Whiteman,Gordon,&Cohen,1986;Campbell,Shaw,&Gilliom,2000;Caspi,Moffitt,Newman,&Silva,1998;Hawkins,Lishner,Catalano,&Howard,1986;Lyons-Ruth,Zeneah,&Benoit,1996;Shaw,Gilliom,Ingolsby,&Nagin,2003;Vicary&Lerner,1983).Sim-ilarly,modestcontinuityhasbeenfoundforinternal-izingsymptoms,inthatyouthexhibitingproblemswithanxietyanddepressioninearlychildhoodarelikelytocontinuetoexhibitthoseproblemsintomiddlechildhoodandadolescence(Briggs-Gowanetal.,2006;Briggs-Gowan,Carter,Irwin,Wachtel,&

Family Intervention Effects on Co-occurring Behavior and

Emotional Problems in Early Childhood: A Latent Transition Analysis Approach

ARIN CoNNEll, BERNADETTE MARIE BUlloCk, ThoMAS J. DIShIoN, DANIEl ShAW, MElVIN WIlSoN, FRANCES GARDNER

AbstrAct

This study used latent transition analysis (lTA) to examine changes in early emotional and behavioral problems in children age 2 to 4 years relative to participation in a family-centered intervention. A sample of 731 economically disadvantaged families were recruited from among participants in a national food supplement and nutrition program. Families with toddlers between age 2 and 3 were randomized either to the Family Check-Up (FCU) or to a nonintervention control group. The FCU’s linked interventions were tailored and adapted to each family’s needs. Assessment occurred at age 2, 3, and 4. The FCU followed age 2 and age 3 assessments. on the basis of mothers’ reports relevant to the Child Behavior Checklist, latent class analyses were used to study children’s transitions across the following four groups from age 2 to age 4: (a) externalizing only, (b) internalizing only, (c) comor-bid internalizing and externalizing, and (d) normative. lTA results revealed that participation in the FCU decreased the likelihood of transitions into the comorbid and internalizing-only class at age 4, relative to the normative no-elevation class. These results are discussed with respect to changes in

Cicchetti,2004;Warren,Huston,Egeland,&Sroufe,1997).

Earlyemotionalandbehavioraldifficultiesmayalsopredicttheemergenceofproblemsinotherimpor-tantdomainsoffunctioning,includingacademicandsocialdifficulties,intoadolescence.Forinstance,lon-gitudinalstudieswithchildrenasyoungasage3years(e.g.,Caspietal.,1998;Shaw&Gross,inpress)haverevealedassociationsbetweenearlybehaviorprob-lemsandlong-termprofilesofrisk,includingsub-stancedependenceinadolescenceandyoungadult-hood.Researchhasdocumentedsimilarlong-termoutcomesassociatedwithinternalizingproblems,includingimpairmentsinsocial,academic,andpro-fessionalfunctioning(e.g.,Fombonne,Wostear,Coo-per,Harrington,&Rutter,2001;Lewinsohn,Rohde,Seeley,Klein,&Gotlib,2003).

Emotionalandbehavioraldifficultiestendtoco-occurinchildhoodatahigherratethanwouldbeexpectedbychance(Angold,Costello,&Erkanli,1999;Lewinsohn,Rohde,&Seeley,1995).Childrenwhoexhibitco-occurringemotionalandbehavioraldifficultiestendtoshowmoresevereimpairment

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CONNELL,BULLOCK,DISHION,SHAW,WILSON,GARDNER

thandothosewithemotionalorbehavioralproblemsalone(Nottelmann&Jensen,1999).Further,evidencesuggeststhatchildrenwithco-occurringemotionalandbehavioraldisturbancesarethemostatriskforseveralseriousadjustmentproblemsinadolescence,includinghigh-risksexualbehavior(Dishion,2000),drugabuse(Rhode,Lewinsohn,&Seeley,1995),aca-demicfailure,suicide,andotherseriousoutcomes(Asarnow&Carlson,1988;Capaldi,1992;Patterson&Stoolmiller,1991;Rhodeetal.,1995).Notsurpris-ingly,youthcomorbidmoodandbehavioralproblemsarealsothemostcostlytosocietyintermsofuseofmentalhealthandjuvenilejusticeresources(Miller,2004).

Early InterventionInlightoftheprevalenceandseriousadverseconse-quencesofearlyemotionalandbehaviorproblems,itiscriticaltoimproveourunderstandingoftheetiol-ogy,developmentalcourse,andpreventionandtreat-mentofco-occurringdisorders.Earlyinterventionmaybeparticularlybeneficial.Awealthofresearchhasdocumentedpositivelongitudinalassociationsbetweenharsh,punitiveparentinginearlychildhoodandlaterchildproblembehavior(Campbell,Pierce,Moore,Marakovitz,&Newby,1996;ShawVondra,Hommerding,Keenan,&Dunn,1994;Shaw,Owens,Vondra,Keenan,&Winslow,1996;Shaw,Gilliom,Ingoldsby,&Nagin,2003),aswellasassociationsbetweenthelackofparentalwarmth,involvement,responsivity,andpositivitywithlaterinternalizingandexternalizingproblems(e.g.,Gardner,1987,1994;Shaw,Winslow,Owens,&Hood,1998;Sup-plee,Unikel,&Shaw,2007).Numerousstudieshavealsodocumentedthelinkbetweenparentalmentalhealthandchildbehaviorproblems,withmaternaldepressionreceivingwidesupportasariskfactorfortheearlydevelopmentofchildhoodinternalizingandexternalizingsymptoms(seeConnell&Goodman,2002).

The toddleryears representa timeofmarkedchangeforchildrenintermsofcognitive,emotional,andphysicalmaturation,requiringparentstoprovidepositivebehavioralsupportandscaffolddevelopmen-tallyappropriatebehaviors(Gardner,Sonuga-Barke,&Sayal,1999).Duringtoddlerhood,thefocusoftheparent–childrelationshipchangesfromemotionalresponsivityandsensitivitytotheinfant’sneedstomonitoringahighlyactivetoddler(Shaw,Bell,&Gilliom,2000).Formanyparents,thistransitionisassociatedwithadecreaseinparentalpleasureinchil-drearingfromthefirsttosecondyears(Fagot&Kava-nagh,1993),andfamilies’adaptationtothisdevel-opmentaltransitionformsthebasisforsubsequentdevelopmentalstages(Shawetal.,2000).Intervening

duringthistransitionalperiodcouldbeinstrumen-taltopreventingthelaterdevelopmentofadolescentproblembehaviorssuchasdelinquency,deviantpeerassociation,andinternalizingdisorders.

Giventhecentralityoffamilyprocessestotheearlydevelopmentofconductproblemsandsymptomsofanxietyanddepression,family interventionsarelikelytobecriticaltopreventingthedevelopmentofproblemsacrossearlychildhood.Alongthisline,anumberofparentinginterventionshavebeenfoundtobeeffectiveforreducingearlyconductproblems(e.g.,Brinkmeyer&Eyberg,2003;Oldsetal.,1997;Webster-Stratton,1990).Lessresearchhasfocusedonfamilyinterventionsforinternalizingdifficulties,althoughseveralsuchinterventionshavebeenshowntoreduceemotionaldistressinyouth(e.g.,Asarnow,Scott,&Mintz,2002;Brentetal.,1997;Diamond,Reis,Diamond,Siqueland,&Isaacs,2002).

Todate,fewstudieshaveexaminedtheimpactofparentinginterventionsonco-occurringemotionalandbehavioraldifficulties.Unfortunately,youthwithco-occurringinternalizingandexternalizingdisordersaremorefrequentlyexcludedfromefficacytrials,comparedwithchildrenwithasinglediagno-sis.Theseverityofco-occurringinternalizingandexternalizingproblemsinchildhooddoesnotsug-gestthatparentsandchildreninthesefamilieswillbeunresponsivetointerventions.Severalstudiessupportthehypothesisthatchildrenwithcomorbidemotionalandbehavioralproblemsandtheirfami-liesareresponsivetointerventionsthatarecarefullytailoredtomeettheirneeds(e.g.,Connell,Dishion,Yasui,&Kavanagh,inpress;Dishion&Stormshak,2007).Beauchaine,Webster-Stratton,andReid(2005)reportedthatacrosssixrandomizedinterventiontri-alsofaparent-traininginterventionforfamilieswith3-to8-year-oldchildrenwithearlyconductproblems,childrenwithco-occurringanxietyanddepressiondemonstratedgreaterreductionsinearlyexternaliz-ingproblemsfrompre-toposttreatmentandbeyondto1-yearfollow-upthandidthosewithsingledis-orders.Similarly,Beauchaine,Gartner,andHagen(2000)reportedmorepositivetreatmentoutcomesfol-lowinginpatienttreatmentfor4-to12-year-oldboyswithconductdisorder/ADHDdiagnosesiftheyalsohadcomorbiddepression/anxietydisorderdiagnoses,relativetoboyswithouttheco-occurringdisorders.OurstudyexaminedtheimpactoftheFamilyCheck-Upinterventionontheprogressionofco-occurringemotionalandbehaviorproblemsinyoungchildrenfromage2to4years.

Previous research on the Family check-UpTheFCUisabriefinterventionthatincludesabroadassessmentoffamilycontextandparentingpractices

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MANUSCRIPT UNDER REVIEW : Journal of Abnormal Child Psychology �Unauthorized reproduction of this article is prohibited.

LATENTTRANSITIONANALYSIS

(seeDishion&Stormshak,2007).Unlikemanypar-entinginterventionsduringwhichparentsreceiveallinterventioncomponentsinastructuredsequence,theFCUapproachisanadaptiveandtailoredfamilyintervention(seeCollins,Murphy,&Bierman,2004).Anadaptiveinterventionframeworkrecognizesthatindividualfamiliesmayhavedifferingneedsandinterventiontargetsandmayvaryintheextenttowhichtheyrequireservices.Thecorefeatureofanadaptiveinterventionisthatspecifictargetsanddosesaredeterminedforeachfamilybasedonapriori,the-oreticallyderived,andempiricallyvalidateddecisionrules.Advantagesofthisapproachincludedecreasedlikelihoodofnegativeinterventioneffects,elimina-tionoftreatmentcomponentsthatareinappropri-ateforagivenfamily,decreasedwasteofresources,potentiallyincreasedcompliancewithtreatment,andincreasedinterventioneffectiveness(Collinsetal.,2004).Interventionscientistsarethusempoweredtocosteffectivelyaddresspublichealthproblemsbyusingaframeworkthatmoredirectlymeetstheneedsoffamilies.Moreover,adaptiveinterventionsmaybeparticularlyattractivetohigh-riskfamiliesforwhomextendedattendanceandengagementmaybediffi-cultinlightofchallengingfamilyorsocialcircum-stances.

TheFCUwasdirectlyinspiredbythemotivationalinterviewing(MI)frameworkofMillerandRollnick(2002).TheMIapproachisintendedtomotivatepar-entstoengagewithtreatmentservicesandtoencour-agebehaviorchangeinfamiliesofhigh-riskyouth.TheFCUisthefirststepinamenuofempiricallysup-portedandfamily-centeredinterventionsdesignedtostrengthenparentingskillsandpromotepositivebehaviors(Dishion&Kavanagh,2003).Incontrasttothestandardclinicalmodel,theFCUisrootedinahealthmaintenancemodel,whichemphasizesperiodiccontactwithfamiliesduringthecourseofkeydevelopmentaltransitions.OurstudyfocusedprimarilyontheFCUforfamilieswithyoungchil-drenwhowereengagedintheWomen,InfantsandChildrenNutritionProgram(WIC)servicesystemandwhodemonstratedriskforcomorbidemotionalandbehavioralproblems.

PreviousresearchhasexaminedtheimpactoftheFCUonproblembehaviorinearlyadolescence,whenofferedinapublicschoolsetting.Usinganintentiontotreatdesign,Dishion,Kavanagh,Schneiger,Nel-son,andKaufman(2002)foundthatproactivepar-entengagementreducedsubstanceuseamonghigh-riskadolescentsandpreventedsubstanceuseamongtypicallydevelopingyouth.Significantreductionsintheseproblembehaviorsresultedfromanaverageofsixdirectcontactmeetingswithparentsduringthecourseofthreeyears.Complieraveragecausaleffect

analysessupportedtheproposalthatparticipationintheFCUandlinkedservicesasneededresultedinsignificant,long-termreductionsinsubstanceuseandantisocialbehavior,includingdecreasedsubstanceusediagnosesandfewerarrestsbytheendofhighschool(Connelletal.,inpress).Shawandcolleagues(2006)appliedtheFamilyCheck-Uptoasampleof120high-riskfamiliesoftoddlersinvolvedintheWICprogram.EngagementintheFCUresultedinreductionsinsub-sequentchildproblembehaviorandimprovementinparentinvolvementatchildage3and4,respectively(Gardner,Shaw,Dishion,Burton,&Supplee,inpress;Shaw,Dishion,Supplee,Gardner,&Arnds,2006).

the current study Thisstudyexamineddatafrom731familiespartici-patinginWICservicesystemswhowererecruitedwhenthechildrenwereapproximately2yearsold.Thesechildrenhadbeendeemedat-riskforshow-ingearly-startingpathwaysofbehaviorproblemsonthebasisofsociodemographicrisk(i.e.,lowincomeandparentaleducation),familyrisk(e.g..,maternaldepression,parentaldrugabuse,teenparent),andchildrisk(e.g.,highlevelsofconductproblems).HalfofthefamilieswererandomlyassignedtoreceivetheFCU.Analysesfocusedontheage4follow-upreportsofchildconductandinternalizingproblems,collectedtwoyearsafterinitialcontactwithfamilies.Fami-liesinthisstudy,whichwerefertoastheEarlyStepsMultisitestudy(ES-M),wererecruitedfromthreegeographicallyandculturallyuniqueregions:met-ropolitanPittsburgh,Pennsylvania,suburbanEugene,Oregon,andruralCharlottesville,Virginia.Thesam-plereflectsculturaldiversityinthatitincludesahighpercentageofAfricanAmerican,EuropeanAmeri-can,andLatinofamilies.InadditiontoreceivingtheFCU,familiesintheinterventiongroupwereprovid-edadaptive,tailoredservicesfollowingtheFamilyCheck-Up,asneeded.

Thisstudy’sanalysesextendtwoearlierreportsontheES-MsamplethatdescribedreductionsinchildconductproblemsandinternalizingsymptomsasaresultofparticipationintheFCU.Dishionandcol-leagues(2007)usedLGMprocedurestoseparatelyexamineinternalizingandexternalizingproblemsfromage2to4.Theyfoundthattreatment-relatedreductionsinexternalizingtrajectoriesmediatedincreasesinpositiveparentingbehavior.Similarly,Shaw and colleagues (2007) found that reducedmaternaldepressivesymptomsfromchildage2to3mediatedimprovementsinbothinternalizingandexternalizingproblemsfromage2to4.

AlthoughthesestudiesprovideimportantevidencefortheeffectivenessoftheFCUintervention,LGManalyseshavelimitations.Forexample,analysesof

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CONNELL,BULLOCK,DISHION,SHAW,WILSON,GARDNER

growthdonotaccountforwithin-childdifferencesinprofilesofinternalizingandexternalizingsymp-toms.Itislikelythatsomechildreninthissampleexhibitedelevationssolelyineitherinternalizingorexternalizingdomains,whileothersdemonstratedco-occurringsymptoms.ItisalsopossiblethattheFCUinterventionmaybedifferentiallyeffectiveforyouthwithdifferentsymptomprofiles,exertingstrongesteffectsforyouthwithco-occurringproblems.Suchapossibilitymaybestbeexaminedusingaperson-centeredanalyticapproach(seeConnell,Dishion,&Deater-Deckard,2006).

Inourstudy,weusedlatenttransitionanalysis(LTA)toidentifyclustersofyouthexhibitingdistinctprofilesofinternalizingandexternalizingsymptomsfromage2to4.ThisstrategyenabledustoexaminewhetherparticipationintheFCUaffectedthetransi-tionbetweensymptomclassesacrossage2to4.LTA,whichwasoriginallydescribedbyGraham,Collins,Wugalter,Chung,andHansen(1991),isparticularlysuitedtoexaminingchangesingroupmembershipovertime(i.e.,comorbid,internalizing-only,orexter-nalizing-onlyclassesofyouth).Ittreatssymptomclus-teringasanunobserved,latentunderlyingnominalclassification.Thatis,groupsofchildrenwithdistinctsymptomprofilesarenotdirectlyobserved,butareinsteadidentifiedbyusingaclassificationmodel,whichprovidesthebasisforstudyingtransitionsfromonegrouptoanotherovertime.Assuch,LTAprovidesameansofdealingwithmeasurementerrorandreducingbiasinestimatesofstabilityandchangeovertime(seeNylund,Muthén,Nishina,Bellmore,&Graham,2007;Pickles&Hill,2006).InlightofShawandcolleagues’(2007)resultsformaternaldepres-sion,weincludedmaternaldepressionasacovari-ateinthecurrentanalyses,examiningtheeffectofmaternalsymptomsonsymptomclassesatchildage2and4.AlthoughDishionandcolleagues(2007)alsoexaminedpositiveparentingbehaviors,becauseLTAiscomputationallyintensiveandperformsbestwithlargesamplesizes(SeeCollins,Hyatt,&Graham,2000),andparentingdatawereavailableonlyforasmallersubsetoffamilies,wedecidednottoincludetheparentingdatainthisreport.

Methods

study ParticipantsParticipantsincluded731mother–childdyadsrecruit-edbetween2002and2003fromWICprogramsinthemetropolitanareasofPittsburgh,Pennsylvania,Eugene,Oregon,andCharlottesville,Virginia(Dish-ion,Shaw,Connell,Gardner,Weaver,&Wilson,2007).FamilieswereapproachedatWICsitesandinvitedtoparticipateiftheyhadasonordaughterbetweenage

2years0monthsand2years11months.Recruitedfamilieswerescreenedtoensurethattheymetthestudycriteriaofhavingsocioeconomic,family,and/orchildriskfactorsforfuturebehaviorproblems.Riskcriteriaforrecruitmentweredefinedasatoraboveonestandarddeviationabovenormativeaveragesrele-vanttothefollowingthreedomains:(a)childbehavior(conductproblems,high-conflictrelationshipswithadults),(b)familyproblems(maternaldepression,dailyparentingchallenges,substanceuseproblems,teenparentstatus),and(c)sociodemographicrisk(loweducationachievementandlowfamilyincomeusingtheWICcriterion).Twoormoreofthethreeriskfac-torswererequiredforinclusioninthesample.

AsshowninFigure1andpartitionedbysiteinTable1,ofthe1666parentswhowereapproachedatWICsitesacrossthethreestudysitesandhadchil-drenintheappropriateagerange,879familiesmettheeligibilityrequirements(52%inPittsburgh,57%inEugene,49%inCharlottesville)and731(83.2%)agreedtoparticipate(88%inPittsburgh,84%inEugene,76%inCharlottesville).Thechildreninthesamplehadameanageof29.9months(SD=3.2)atthetimeoftheage2assessment.

Ofthe731families(49%female),272(37%)wererecruitedinPittsburgh,271(37%)inEugene,and188(26%)inCharlottesville.MoreparticipantswererecruitedinPittsburghandinEugenebecauseofthelargerpopulationofeligiblefamiliesintheseregions

Study Candidates ScreenedN = 1666

Study Candidates QualifiedN = 879

Study Candidates Participated

N = 731

Participants in Age 2Assessment Assigned to

Control ConditionN = 364

Participants in Age 2Assessment Assigned to

Treatment ConditionN = 367

Participants in Age 3Assessment Assigned to

Control ConditionN = 330

Participants in Age 3Assessment Assigned to

Treatment ConditionN = 332

Participants in Age 4Assessment Assigned to

Control ConditionN = 310

Participants in Age 4Assessment Assigned to

Treatment ConditionN = 317

Figure 1.Participantflowchart.

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LATENTTRANSITIONANALYSIS

relativetoCharlottesville.Acrosssites,thechildrenwerereportedtobelongtothefollowingracialgroups:27.9%AfricanAmerican,50.1%EuropeanAmerican,13.0%biracial,and8.9%otherraces(e.g.,AmericanIndian,NativeHawaiian).Intermsofethnicity,13.4%ofthesamplereportedbeingHispanicAmerican.Duringthe2002–2003screeningperiod,morethantwo-thirdsofthosefamiliesenrolledintheprojecthadanannualincomeoflessthan$20,000,andtheaveragenumberoffamilymembersperhouseholdwas4.5(SD=1.63).Forty-onepercentofthepopulationhadahighschooldiplomaorGEDequivalency,andanadditional32%hadonetotwoyearsofpost–highschooltraining.

Retention.Ofthe731familieswhoinitiallypar-ticipated,659(89.9%)wereavailableattheone-yearfollow-upand619(84.7%)participatedatthetwo-yearfollow-upwhenchildrenwerebetweenage4and4years11months.Atage3and4,selectiveattritionanalysesrevealednosignificantdifferencesrelevanttoprojectsite,children’srace,ethnicity,gender,lev-elsofmaternaldepression,orchildren’sexternal-izingbehaviors(parentreported).Furthermore,nodifferenceswerefoundinthenumberofparticipantswhowerenotretainedinthecontrolversusintheinterventiongroupsatbothage3(n=40andn=32,respectively)andage4(n=58andn=53,respec-tively).

MeasuresDemographics questionnaire.Ademographicsques-tionnairewasadministeredtothemothersduringtheage2andage4visits.Thismeasureincludedques-

tionsaboutfamilystructure,parentaleducationandincome,parentalcriminalhistory,andareasoffamil-ialstress.

Child Behavior Checklist (CBCL; Achenbach & Rescorla, 2000).TheCBCLisawell-establishedandwidelyused99-itemquestionnairethatassessesparen-talreportsofbehavioralandemotionalproblemsinyoungchildrenfromage1.5to5years.Motherscom-pletedtheCBCLatthechildage2andage4visits.TheCBCLhastwobroad-bandfactors,InternalizingandExternalizing.TheInternalizingscalecomprisesfoursubscales,includingEmotionalReactivity,AnxietyandDepression,SomaticProblems,andSocialWith-drawal.TheExternalizingscalecomprisestwosub-scales,AggressionandAttentionProblems.Foruseinthelatentclassanalyses(LCAs)andLTAs,scoresonthesesixsubscalesweredichotomizedtoreflectyouthbeingratedinthenormativerangeonagivenscale(t-score<60)versusintheborderlineorclinicalrange(t-score≥=60).

Center for Epidemiological Studies on Depres-sion scale (CES-D).TheCES-D(Radloff,1977)isawell-establishedandwidelyused20-itemmeasureofdepressivesymptomatologythatwasadminis-teredtomothersatthechildage2andage4homeassessments.Mothersreportedhowfrequentlytheyhadexperiencedlisteddepressivesymptomsduringthepastweekonascalerangingfrom0(lessthan1day)to3(5–7days).Itemsweresummedtocreateanoveralldepressivesymptomsscore.Forthecur-rentsample,internalconsistencieswere.76and.75attheage2andage4assessments,respectively.Aver-agelevelsofself-reporteddepressivesymptomsweremoderatelyelevatedatage2(M=16.75,SD=10.66),andage4assessments(M=14.99,SD=10.88),withscoresgreaterthan16reflectiveofclinicallysignifi-cantsymptomlevels(Radloff,1977).

Child gender.Childgenderwascodedas0=“male”and1=“female.”

Child ethnicity.Youth-reportedethnicitywascodedas0=“Caucasian”and1=“ethnicminority.”

Intervention status.Randomassignmentwascodedas0=“control”and1=“intervention.”

Assessment protocol.Parents(i.e.,mothersand,ifavailable,alternativecaregiverssuchasfathersorgrandmothers)whoagreedtoparticipateinthestudywerescheduledfora2.5-hourhomevisit.Eachassess-mentbeganbyintroducingthechildrentoanassort-mentofage-appropriatetoysandhavingthemplayfor15minuteswhilethemotherscompletedquestion-naires.Afterthefreeplay(15minutes),eachprimarycaregiverandchildparticipatedinseveraltasks:(a)aclean-up(5minutes),(b)childdelayofgratification(5minutes),(c)fourteachingtasks(3minuteseach,withthefinaltaskbeingcompletedbyalternatecaregiver

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CONNELL,BULLOCK,DISHION,SHAW,WILSON,GARDNER

andchild),(d)asecondfreeplay(4minutes),(e)asecondclean-uptask(4minutes),(f)thepresentationoftwoinhibition-inducingtoys(2minuteseach),and(g)amealpreparationandlunchtask(20minutes).Theexacthomevisitandobservationprotocolwasrepeatedatage3and4forboththecontrolandtheinterventiongroup.Familiesreceived$100,$120,and$140forparticipatingintheage2,3,and4homevis-its,respectively.

Computer-generatedrandomizationtoFCUandcontrolgroupswasconductedbyastaffmemberwhohadnotbeeninvolvedinrecruitment.Randomizationwasbalancedbygendertoensureanequalnumberofmalesandfemalesinthecontrolandinterventiongroups.Toensureexaminerblindnesstotheinter-ventioncondition,asealedenveloperevealingthefamily’sassignmentwasopenedandsharedwiththefamilyaftertheassessmentwascompleted.Examin-erswhocarriedoutfollow-upassessmentswereneverinformedofthefamily’srandomlyassignedcondi-tion.

Forpurposesofthisstudy,onlymaternalreportsofchildproblembehaviorwereusedfromtheage2and4assessments,andmaternalreportsofdepressionwereusedfromtheage3assessment.

Intervention protocol.TheFCU.Familiesrandom-lyassignedtotheinterventionconditionwerethenscheduledtomeetwithaparentconsultantfortwoormoresessions,dependingonthefamily’spreference.Typically,thethreemeetingsincludeaninitialcontactsession,anassessmentsession,andafeedbacksession(Dishion&Kavanagh,2003).Tooptimizetheinternalvalidityofthestudy(i.e.,preventdifferentialdropoutforexperimentalandcontrolconditions),theassess-mentswerecompletedbeforerandomassignmentresultswererevealedtoeithertheresearchstafforthefamily.Thus,forpurposesofresearch,thesequenceofcontactswasasfollows:assessment(baseline),ran-domization,initialinterview,feedbacksession,andfollow-upsessionsbasedontheneedsofindividualfamilies.Eachfamilywasgivena$25giftcertificateattheendofthefeedbacksessionforcompletingtheFCU.

Essentialobjectivesofthefeedbacksessionweretoexplorethecaregivers’willingnesstochangeprob-lematicparentingpractices,supportexistingpar-entingstrengths,andidentifyservicesappropriatetothefamilyneeds.Duringthissessiontheparentwasofferedfollow-upsessionsfocusedonparentingpractices,otherfamilymanagementconcerns(e.g.,coparenting),andcontextualissues(e.g.,childcareresources,maritaladjustment,housing,vocationaltraining).

ParentconsultantswhofacilitatedtheFCUandfollow-upparentingsessionswereacombinationof

Ph.D.-andmaster’s-levelclinicians,allwithpreviousexperienceinimplementingfamily-basedinterven-tions.Parentconsultantswereinitiallytrainedfor2.5–3monthsusingacombinationofstrategies,includ-ingdidacticinstructionandroleplaying,followedbyongoingvideotapedsupervisionofinterventionactivity.Beforeworkingwithstudyfamilies,parentconsultantswerecertifiedbyleadparentconsultantsateachsite,whohadpreviouslybeencertifiedbyDr.Dishion.Certificationwasestablishedbyreviewingvideotapesoffeedbackandfollow-upinterventionsessionstoevaluatewhetherparentconsultantswerecompetentinallcriticalcomponentsoftheinterven-tionasdescribedlaterinthisarticle.Thisprocessisrepeatedyearlytoreducedriftfromtheinterventionmodel,consistentwiththemethodsofForgatch,Pat-terson,andDeGarmo(2005),whofoundthatdirectobservationsoftherapistfidelitytoparentmanage-menttrainingpredictedchangeinparentingpracticesandchildbehavior.Inaddition,cross-sitecaseconfer-enceswereconvenedweeklyusingvideoconferenc-ingtofurtherenhancefidelity.Finally,annualpar-entconsultantmeetingswereheldtoupdatetraining,discusspossiblechangesintheinterventionmodel,andaddressspecialinterventionissuesreflectedbytheneedsoffamiliesacrosssites.

Ofthefamiliesassignedtothetreatmentcondition,77.9%participatedintheinitialparentconsultantmeetingandfeedbacksessionsatchildage2,65.4%atage3,and65.3%atage4(seeTable1).Ofthosefamilieswhometwithaparentconsultant,theaver-agenumberofsessionsperfamilywas3.32(SD=2.84)atchildage2and2.83(SD=2.70)atage3,includingtheinitialparentconsultantmeetingandfeedbackastwoofthosesessions.

Analysis strategy.ThecentralanalysesusedanLTAframeworktoexaminechangesinlatentclassmem-bershipovertime,relativetoparticipationintheinter-ventionprogram.LTAisanadvancedautoregressivemodelinwhichclassmembershipateachtimepointisnotdirectlyobserved,butrepresentsacategoricallatentvariableidentifiedwithameasurementmodel.LTAincludesbothameasurementcomponentandastructuralcomponent.Forthemeasurementcompo-nent,itemprobabilitiesareclass-specificparameters

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thatdescribethelikelihoodofanindividualinagivenclasstoendorseeachitem.Twostructuralcompo-nentsincludeclassprobabilities,whichdescribethesizeofeachlatentclassateachtimepoint,andtransi-tionprobabilities,whichareconditionalprobabilitiesdescribingtheprobabilityofbeinginagivenstateattime=t,conditionalonthestateattime=t−1(andonthestatusofcovariates,ifpresent).

Inthisstudy,wefollowedthegeneralguidelinesputforthbyNylundandcolleagues(2007),proceedingthroughtheLTAprocessinseveralsteps.First,sepa-rateLCAswereusedtoexaminetheoptimalnumberoflatentclassesateachstudywave.Second,anLTAwithoutcovariatesexaminedtransitionsacrosslatent

classesfromage2to4.Finally,covariateswereaddedtotheLTAmodeltoexaminetheeffectoftreatment,childgender,ethnicity,maternaldepressivesymp-tomsonlatentclassmembershipatage2and4,andtransitionprobabilitiesovertime.DetailedstatisticalpresentationsofthegeneralLTAframeworkareavail-ableinNylundandcolleagues(2007),HumphreysandJanson(2000),andReboussin,Reboussin,Liang,andAnthony(1998).

resultsDescriptivestatisticsforCBCLsubscalesareshowninTable2.Correlationsforallvariablesfromage2to4areshowninTable3.Itisimportanttonotethatnosignificantassociationswerefoundbetweentreat-mentgroupandchildgenderorethnicity,levelsofmaternaldepressivesymptoms,oranytypeofchildproblembehavioratage2,suggestingthatrandomiza-tionwassuccessful.Modesttomoderateassociationswereconsistentlyfoundbetweenmaternaldepressionandfactorsofchildproblembehaviorconcurrentlyandovertime,andamongdifferentfactorsofchildproblembehavior.

Latent class Analyses at Age 2 and 4WefirstexaminedseparateLCAsatage2and4todeterminetheoptimalnumberofclassesneededtobestcharacterizedataateachage.Mixturemodeling(ofwhichLCAisaspecificform)isanactiveareaofmethodsresearchregardingtheoptimalapproachtodeterminingthenumberof latentclasses(e.g.Nylund,Asparouhov,&Muthén,2006).Fitindices

were obtained for uncondi-tionalmodelswith1–6classesateachage.Modelswithdif-ferentnumbersoflatentclassesarenotnested,soMuthénandMuthén (2000) have recom-mended the following threecriteriaforselectingtheopti-malnumberoflatentclassesinfactormixturemodels:(a)theBayesianinformationcriteria(BIC)andasample-sizeadjust-edversionoftheBIC(AdjBIC),withlowerscoresrepresentingbetter-fittingmodels; (b) thequalityofclassificationacrossmodels,representedbyentro-py,withhigherentropyvaluesindicatingbetterclassificationofindividualsintotheirmostlikelytrajectoryclass; (c) thebootstrappedlikelihoodratiotest(BLRT),whichprovidesa

Figure 2.LCAresultsatage2.

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CONNELL,BULLOCK,DISHION,SHAW,WILSON,GARDNER

statisticalcomparisonofthefitofagivenmodelwithamodelofonefewerclasses;and(4)thetheoreticalrelevanceandusefulnessoflatenttrajectoryclasses.RecentsimulationstudiesbyNylundandcolleagues(2006)supportedtheuseofAdjBICandBLRTforselectionoftheoptimalnumberofclassesinLCAmodels,withtheBLRTprovidingparticularlycon-sistentcorrectresults.Inlightofthesefindings,weplacedprimaryweightontheBLRTandtheAdjBICvaluesinselectingthenumberofclasses.Allanalyseswereconductedusing100randomizedstartvaluesrunfor10iterationseach,withthebest-fitting25ran-domizedstartvaluesruntomodelconvergence.

AsshowninTable4,boththeAdjBICandtheBLRTsupportedafour-classsolutionatage2.Atage4,theBLRTsupportedafour-classsolutionandtheAdjBICsupportedathree-classsolution.Wechosethefour-classsolutiontorepresentoptimalfitinlightofNylundandcolleagues’(2006)recommenda-tions,andconsistencyofthefour-classsolutionwith

hypothesesandtheories,aswellastheconsistencyofthefour-classsolutionatage4withthefour-classsolutionatage2.Theresultingfourclassesatage2and4aredepictedinFigures2and3.Mostyouthateachageareinaclasswithlowprobabilityofbeingintheborderline/clinicalrangeonanyscale.Becauseoftherelativesizeandlowlikelihoodofproblems,welabelthisclassnormativethroughouttheremainderofthisarticle.Asecondclassshowedrelativelyele-vatedprobabilitiesofsignificantproblemsonthetwoExternalizingsubscales,alongwiththeWithdrawalscale.Werefertothisclassasexternalizing.AthirdclassshowedrelativelyelevatedlikelihoodsofbeingintheclinicalrangeonthefourInternalizingscales,sowerefertothisclassasinternalizing.Finally,afourthclassshowedelevationsonallsixsubscales,sothisclassislabeledcomorbid.

Thesefourclassesmatchwellwiththefourclassesthatwouldbeexpectedonthebasisoftheoryandpastresearch, lending increasedconfidencethattheyreflectmeaningfulclustersofyouth.Itisworthemphasizingthatthesizesoftheclassesweresome-whatdifferentatage2thanatage4,particularlyfortheexternalizingclass,whichdecreasedinsizeovertime(30.4%atage2and18.3%atage4),andthenor-mativeclass,whichincreasedinsizeovertime(46.9%atage2and62.7%atage4).

Latent transition Analyses from Age 2 to 4LTAswereconductednext,whichpermittedtheexaminationoftransitionsacrossclassesfromage2toage4.WefirstexaminedanunconditionalLTAmodel.ClassproportionsfromthismodelareshowninTable5.AswasfoundintheLCAmodels,theexternalizingclassdecreasedinsizeacrossage2andage4,whilethenormativeclassgrewsubstantiallyovertime.Conversely,theinternalizingandcomorbidclasseswererelativelystableinsizeacrossage2and

age4,showingaslightdecline.Latent transition probabilities

fromthisunconditionalmodelareshown inTable6.As shown, thenormativegroupwashighlystableovertime,with90.8%ofyouthinthisgroupatage2remaininginthisgroupatage4.Nearly25%oftheage2 internalizingclass transitionedintotheage4comorbidclass,whilenoyouthinthisgrouptransitionedintotheage4externalizingclass,and42.7%transitionedintothenor-mativeclass.Veryfewyouthintheage2externalizingclasstransitionedintoeithertheage4internalizingorcomorbidclasses,withnearly50%of

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Figure 3.LCAresultsatage4.

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thosetransitioningoutofthisclasstransitioningintothenormativeclassatage4.Only9.5%oftheage2comorbidclasstransitionedintothenormativeclass,whilenearly33%transitionedintotheage4internal-izingclass.

Next,weaddedthreetime-invariantcovariates,

includinginterventionstatus,childgender,andchildethnicity,andonetime-varyingcovariate,maternaldepressivesymptoms,tothemodel.TheconditionalLTAmodelisdepictedinFigure4.Asafirststep,weexaminedwhethertoallowinterventiontopredictage2classmembership.Effectssuchasthesewouldbeproblematicbecauseinterventionwasnotdelivereduntilaftertheage2assessment,soage2interven-tioneffectswouldref lectproblemswithrandomization.However,noneoftheseeffectswassignificant,sowefollowedamoreparsimoniousapproachofpermit-tinginterventioneffectsonlyforage4classes.Theadditionofcovariateschangedthelatenttransitionprobabilitiessome-what,asshowninTable7,andappearedtoslightlyincreasethecross-timestabil-ityofeachoftheclasses.CovariateeffectsonclassmembershipareshowninTable8.Mostnotably,interventionpredictedasignificantlyreducedlikelihoodofbeinginthecomorbidclassatage4,andatrend-level(p<.06)effectonthelikelihoodofmembershipintheinternalizingclassat

age4,relativetothenormativeclass.Thatis,youthwhoreceivedinterventionwerelesslikelytobeineitherof these twoclassesandmorelikelytobeinthenormativeclassinstead, compared

withtheothergroupsofchildren.Theoddsratiosforbeinginthecomorbidversusnormativeclassatage4associatedwiththereceiptofinterventionis.16,asistheoddsratioforbeingintheage4internalizingversusnormativeclassinrelationtotreatmentstatus.However,interventionwasunrelatedtothelikelihood

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CONNELL,BULLOCK,DISHION,SHAW,WILSON,GARDNER

ofmembershipintheexternalizing-onlyclass.Theanalysisofothersignificantcovariateeffects

onclassmembershipresultedinfindingsonlyatage2.Malegenderpredictedasignificantlygreaterlikeli-hoodofmembershipintheexternalizingclassatage2,andethnicminoritystatuspredictedatrend-levelincreaseinthelikelihoodofmembershipintheage2comorbidclass.Elevatedmaternaldepressivesymp-tomspredictedasignificantlygreaterlikelihoodofmembershipintheage2comorbidclass,andatrend-levelincreaseinthelikelihoodofmembershipintheage2externalizingclass,relativetothenormativeclass.

DiscussionThegoalofthisstudywastoexaminethehypoth-esisthattheFCUwouldresultindecreasesinyoungchildren’stransitionsintoco-occurringemotionalandbehavioralproblemsbyage4.Stepsthatledtothetestofthishypothesisincludedestablishingthenumberofclasses(LCA)ofyoungchildrenatage2and4,examiningthedistributionoftheseclasses,andthentestingtheimpactofarandomizedinterventionwhencontrollingforethnicity,maternaldepression,andgender.

Asexpected,resultsofLCAmodelssupportedtheexistenceoffourclassesatage2and4years,cor-respondingwiththeinternalizing,externalizing,comorbid,andnormativegroupsthatwereexpectedtobecomeapparentonthebasisofpastresearchandtheory.Severalfindingsarenoteworthyregardingtheseclasses.First,membershipinthecomorbidgroupatage2waspredictedbyelevatedsymptomsofdepressioninmothers,andbyethnicminoritystatus.Second,membershipintheage2externalizinggroupwaspredictedbymaternaldepressivesymptomsalone.Interestingly,maternaldepressivesymptomsdidnotpredictmembershipintheinternalizing-onlyclassatthisearlyage,whichisinconsistentwithpreviousresearch(Connell&Goodman,2002).

Itisimportanttonotethat“psychopathology”atthisearlyageisatransientphenomenon.Manyyouthinthethreeat-riskclassestransitionedintothenor-mativegroupbyage4.Thistransitionintolowerriskstatuswasparticularlypronouncedforearlyexter-nalizing-onlyproblems,withnearlyhalfoftheearlyexternalizinggroupmovingintothenormativegroupbyage4.Thispatternoffindingsisconsistentwiththatofotherresearch(e.g.,Cote,Vaillancourt,Leb-lanc,Nagin,&Tremblay,2006;NICHDEarlyChildCareResearchNetwork,2004),suggestingthatearlyproblemswithaggressionmayabateformanyyouth(althoughotherformsofearlyconductproblemsmaypersist).

Anunexpectedfindingwasthatmanyyouthwith

earlyinternalizingproblemsappearedtodevelopco-occurringexternalizingproblemsbyage4,butnoyouthswitchedfromtheearlyinternalizingtotheage4externalizingclass.Conversely,fewyouthmovedfromtheearlyexternalizingclassintoeitherthelaterinternalizingorlatercomorbidclasses.Theseresultsmaysuggestthatearlyemotionalproblemsmaysetthestageforthelateremergenceofco-occurringbehavioralproblems,butthatearlybehavioralprob-lems,bythemselves,maynotpredicttheemergenceofproblemswithanxietyordepressionbyage4.Atthisstage,itisunclearwhetherthisisanassessmentissueoroneofdevelopmentalsignificance.Individualdif-ferencesininternalizingandexternalizingproblemsareimpactedbymethodvarianceandthereforearevulnerabletoreportingbiasesandinadequateitempools.Withrespecttothelatterissue,wesuspectthereisaneedtodevelopmeasuresofemergingpsy-chopathologythatareuniquelysensitivetopatternsevidentinearlychildhood.

Itisimportanttoconsiderthatchildrenwithearlybehaviorproblemsmaydevelopinternalizingprob-lemsastheyenterschoolandareexposedtopeerswhomayacceptorrejectthem.ThispossibilitywouldbepredictedbyPatterson’sdual-failuremodel(Pat-terson&Stoolmiller,1991),inwhichchildrenwithearlyexternalizingproblemsareatriskforaccumu-latingsocialandacademicfailureexperiences,whichmayinturnleadtotheemergenceoflaterproblemswithanxietyanddepression.Aswefollowthesechil-drenintoearlyelementaryschool,wewillbeabletoexaminelatertransitionpatternsforchildreninall4classes.

Intervention EffectsResultsrevealedthatparticipationintheFCUsig-nificantlyreducedthelikelihoodofchildcomorbidemotionalandbehavioralproblemsatage4.ChildreninthecomorbidproblemsclasswerelesslikelytohavebeenrandomlyassignedtotheFCUintervention,indicatingthatinterventionsubstantiallydecreasedthelikelihoodofeitherremaininginortransitioningintothisclassfromage2toage4.Similareffectswereobservedfortheinternalizing-onlygroup.

Theseresultsareparticularlynoteworthybecausethesechildrenmaybeparticularlyatriskforcon-tinuedproblemslaterindevelopment,andareoftenexcludedfrominterventionstudiesbecauseoftheirdualdiagnosis.Resultsofthisstudyindicatethatchildreninthecomorbidgroupmaybeparticularlyresponsivetoearlyfamilyinterventionefforts,show-ingsignificantreductionsinthelikelihoodofcontin-uedproblems.Giventhatmostinterventionstudieseitherexcludecomorbidcasesorfocusononlyoneoutcomeofinterest,itisdifficulttofitthefindings

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ofthisstudyinwiththegeneralpreventionorchildclinicalliterature.Itwouldbeveryhelpfuliffutureresearchoninterventionoutcomefocusedonmultipledomains(e.g.,depression,problembehavior)toevalu-atetheoveralleffectivenessofdiverseinterventionsofchildandadolescentmentalhealth,morebroadlyconceptualized.

Theseresultsareinlinewiththelimitednumberofpastinterventionstudies(i.e.,Beauchaineetal.,2000;Beauchaineetal.,2005),infindingthatyouthwithco-occurringemotionalandbehaviorproblemsappeartobeparticularlyresponsivetoearlyinterven-tion.Interestingly,researchfromastudyof2-to4-year-oldtwinsfoundthatco-occurringemotionalandbehavioralproblemswerestronglyrelatedtosharedfamilyenvironmentalinf luences,arelativelyrarefindinginthebehaviorgeneticsliterature(Gregory,Eley,&Plomin,2004).Thatfindingsupportstheeffi-cacyoffamily-centeredinterventionstoamelioratethedevelopmentofcomorbidinternalizingandexter-nalizingproblemsinchildhood.Furtherresearchisneededtoexaminemediatingprocessesrelativetotheintervention,aswellastheirassociationwiththeonsetandcourseofcomorbidemotionalandbehav-ioralproblemsinchildhood.Consistentwithpastresearchinvolvingthissample(Dishionetal.,2007),wesuspectthatimprovementsinfamilyfunction-ingsuchasincreasedparentalwarmthandproactivestructuringwillmediatetheeffectsofinterventiononthelikelihoodofexhibitingcomorbidproblemsbyage4.Methodologicalresearchisneeded,however,toimprovetheexaminationofmediationinthecontextofLTAmodels.

Similarinterventioneffectswerefoundforreducedlikelihoodofshowingonlyinternalizingproblemsbyage4,althoughtheseresultswereattrendlevel.Theseresultsindicatethatimprovingparentandfamilyfunctioningmayalsobeimportantforyouthexhibitingearlysymptomsofanxietyanddepression,alone.TheyareconsistentwithotherstudiesinwhichtheFCUwasassociatedwithreductionsininternal-izingproblemsinearlyadolescence(Connell&Dish-ion,2007).Takentogether,theseresultssupportthenotionthatfamily-centeredinterventionsarelikelytobeimportantforreducingproblemswithanxietyanddepressioninyouth.

Itisimportanttonotethatinterventioneffectswerenotfoundfortheexternalizing-onlyclass.DespitethefactthattheFCUwasoriginallydesignedtopreventearlyconductproblems,theexternalizingclasswastheonlyhigh-risklatentclassthatdidnotdemon-strateaninterventioneffect.Onepossiblereasonforthelackofeffectforthisclassofchildrenisthatmanymovedoutofthisclassandintothenorma-tiveclassontheirown.Thecurrentfindingsmayalso

qualifypriorresultsforthissample(Dishionetal.,2007;Shawetal.,2007),inwhichLGMwasusedtodocumentthatchildrenwhoseparentsparticipatedintheFCUexhibitedgreaterdeclinesinexternaliz-ingproblemsfromage2toage3relativetothoseinthecontrolgroup.ThecurrentLTAresultssuggestthatthoseinterventioneffectsonchangesinexter-nalizingproblemsmayhavebeenprimarilydrivenbychildrenexhibitingco-occurringemotionalandbehaviorproblemsratherthanbythosewithonlyearlybehaviorproblems.

LimitationsSeveralmethodologicallimitationstothecurrentstudymeritconsideration.Firstandforemostistheissueofpotentialreporterbias.Thereisconsistentevi-denceintheliteraturethatmotherswithelevatedlev-elsofdepressivesymptomsshowatendencytoreporthigherlevelsofchildren’sproblembehavior(Fergus-son,Lynskey,&Horwood,1993).Becausemothersreportedonboththeirowndepressivesymptomsandonchildren’sexternalizingandinternalizingproblembehavior,reductionsinmaternaldepressivesymptomsthatappearedtobeafunctionofrandomizationtotheinterventiongroupmayhavealsoamplifiedgroupdifferencesinproblembehaviorandmaternalpercep-tionsoftheseverityofexternalizingsymptoms.Ontheonehand,itispossiblethatgroupdifferencesarepartiallyresponsibleforperceivedchangesinchildproblembehavior.However,Dishionandcolleagues(2007)recentlyfoundthatobservedparentingbehav-iorspredictedimprovementsinmother-ratedbehav-iorproblemsinthissample,supportingthenotionthatmother-reportedproblemsrelatedtoindepen-dentlyobservedparentingbehaviorinthisstudy.Itshouldalsobenotedthataselevatedlevelsofdepres-sivesymptomsduringthetoddlerperiodhavebeenrelatedtoteacherreportsoflow-incomechildren’sconductproblems,itisstillpossiblethatmodifyingmaternaldepressionduringthetoddlerperiodwillbeassociatedwithreducedproblembehaviorduringtheschool-ageperiod.Futureplannedassessmentsthatincludeteacherandafter-careproviderreportswillshedlightontheextenttowhichimprovementsinproblembehaviorarelimitedtomaternalperceptionsandthehomeenvironment,aswellastime.

Second,althoughwepresentedevidencetosug-gestthattheFCUisassociatedwithimprovementsinchildproblembehaviorandmaternaldepressivesymptoms,effectsizes,albeitmeaningfulfromapublichealthperspective,wererelativelymodest(dsrangedfrom.14to.19).FurtherrefinementoftheFCUwillbeneededtoincreaseitsefficacyforfamilieswithyoungchildren.

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Implications and Future DirectionsThis study’s findings corroborate previous evi-dencethatlongitudinalchangesinchildemotionalandbehavioraldifficultiescanbeachievedwithabrieffamily-centeredinterventionfortoddlers.Thechangesobservedinourstudywereachievedamonglow-incomefamiliesparticipatinginanexisting,nationallyavailableservicedeliverysetting(WIC).Thefamilieshadchildrenatriskforearly-startingpathwaysofexternalizingbehavioranddidnottypi-callyusementalhealthservices(Haines,McMunn,Nazroo,&Kelly,2002).Wehopethatfuturefollow-upofthepresentcohortwillclarifyconcernsregardingtheintervention’senduranceandgeneralizabilitytoothercontexts,andlaterdevelopmentaltransitionsinchildren’spatternsofemotionalandbehavioraldif-ficultiesastheyenterschoolage.

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