center for developmental research Örebro university, sweden maarten van zalk, lauree tilton-weaver,...
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![Page 1: Center for Developmental Research Örebro University, Sweden Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk](https://reader036.vdocuments.mx/reader036/viewer/2022062801/56649e4d5503460f94b4323b/html5/thumbnails/1.jpg)
Center for Developmental
ResearchÖrebro University, Sweden
Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk
![Page 2: Center for Developmental Research Örebro University, Sweden Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk](https://reader036.vdocuments.mx/reader036/viewer/2022062801/56649e4d5503460f94b4323b/html5/thumbnails/2.jpg)
Overview Our main interests
Current SIENA studies
Main issues & many wishes
![Page 3: Center for Developmental Research Örebro University, Sweden Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk](https://reader036.vdocuments.mx/reader036/viewer/2022062801/56649e4d5503460f94b4323b/html5/thumbnails/3.jpg)
Personal interests
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Interests Online vs. offline networks (Maarten)
Personality: psychopathic traits, Big Five (Maarten, Margaret)
Externalizing: delinquency, bullying, aggression (Margaret, Håkan, Lauree)
Internalizing: depression, social anxiety (Maarten, Nejra)
Parents, peers, & externalizing (Lauree)
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Data Seven Schools: up to 8 friends in the school (N
= 2,500)
Political Socialization Program: Up to 10 friends in school (N = 4,500)
10-to-18: large community, up to 23 friends, romantic partners, and siblings in the community (N = 4,500)
ONLINE vs.OFFLINE: small community & 89% of all friends found exclusively online (N = 700)
ALL data also have independent parental reports
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Recent publications Kerr, M, Van Zalk, M., Stattin, H. (in press). Psychopathic traits moderate
peer influence on delinquency. Journal of Child Psychology and Psychiatry.
Van Zalk, N., Van Zalk, M., Kerr, M. & Stattin, H. (in press). Socialization of social anxiety in adolescent crowds: Punks, goths, and other eye-catching peer crowds revisited. Journal of Abnormal Child Psychology.
Van Zalk, N., Van Zalk, M., Kerr, M. & Stattin, H. (2011). Social anxiety as basis for friendship selection and socialization in a youth social network. Journal of Personality, 29, 499-525.
Van Zalk, M., Kerr, M.. Branje, S., Stattin, Håkan, & Meeus, W. (2010). Peer contagion and adolescent depression: The role of failure anticipation. Journal of Clinical Child and Adolescent Psychology, 39, 837-848.
Van Zalk M., Branje, S. Kerr, M.,Stattin, H., & Meeus, M. (2010). It takes three: Selection, influence, and de-selection processes of depression in adolescent peer networks. Developmental Psychology, 46, 927-938.
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Issues & Wishes Moderation / Interaction effects
Mediation / Indirect effects
![Page 8: Center for Developmental Research Örebro University, Sweden Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk](https://reader036.vdocuments.mx/reader036/viewer/2022062801/56649e4d5503460f94b4323b/html5/thumbnails/8.jpg)
Plotting Simple Slopes
Y' = b1(x1-x1^) + b2(x2-x2^) + b3((x1-x1^)(x2-x2^))
b1 = IV (parenting-ego estimate)b2 = Moderator (delinquency-alter estimate)b3 = Interaction: parenting-ego×delinquency-alter estimate
For x1^ the average parenting score was used
For x2^ the average delinquency score was used
![Page 9: Center for Developmental Research Örebro University, Sweden Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk](https://reader036.vdocuments.mx/reader036/viewer/2022062801/56649e4d5503460f94b4323b/html5/thumbnails/9.jpg)
Moderation Approach to graphing: Plot simple slopes
Is there a user-friendly way to visualize and test differences between groups?
Is this the best for two variables with a wide range of values?
Average scores or average for ego/alter?
If only for ego or alters, how do you get this information?
Are ego-alter tables the way to go?
Wish: Function in RSiena that can help visualize interaction effects, visualize the slopes for the different effects
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Mediation Processes / mechanisms underlying peer
influence effects
Crucial for understanding how peer influence works
Stages in influence
Indirect effects
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Mediation Do negative cognitions mediate peer
influence on depressive symptoms?
Traditional conditions for mediation:
1) X on Y
2) X on Z
3) When X and Z together on Y, only X remains
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Mediation Do negative cognitions mediate peer
influence on depressive symptoms?
Recently:
Indirect effects of X on Y VIA Z
Friends depr
Targets’ depression
Negative cognitions
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MediationDepressive symptoms Cognitions
Behavioral evolution (influence)
Parameter
s.e. Parameter
s.e.
Rate period 1 10.1221***
1.79 8.1231*** 1.43
Rate period 2 10.2134***
1.89 8.975*** 1.31
Linear shape 1.21*** .24 1.45*** .23
Quadratic shape 1.12*** .23 1.81*** .33
Ego’s negative cognitions
.43*** .08
Average alter .12*** .04 .74*** .12
Average alt
Targets’ depression
Negative cognitions
.74*** .43***
.12***
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Mediation Indirect effects of X on Y VIA Z
Can we use a Sobel’s test?
Boots-trapping?
Average alt
Targets’ depression
Negative cognitions
.74*** .43***
.12***
![Page 15: Center for Developmental Research Örebro University, Sweden Maarten van Zalk, Lauree Tilton-Weaver, Margaret Kerr, Håkan Stattin, Nejra van Zalk](https://reader036.vdocuments.mx/reader036/viewer/2022062801/56649e4d5503460f94b4323b/html5/thumbnails/15.jpg)
Overview Our main interests
Current SIENA studies
Main issues & many wishes