2013 hkdse biology - candidates performance seminar ... · paper biology; cs(bio) ... marking&...
TRANSCRIPT
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HKDSE Biology & CombinedScience (Biology)
Report onAssessment
Ben Tsui
Manager (Biology), HKEAA
20 & 29 Nov 2013
1
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Time
2:002:30
2:302:55
2:553:20
3:203:35
3:354:00
4:004:25
4:244:50
4:505:15
Content
ExamStatistics
PerformanceinPaper1Panel1
PerformanceinPaper1Panel2
Break
PerformanceinPaper1Panel3
PerformanceinPaper2 (A&C)
PerformanceinPaper2 (B&D)
Q&A
Speaker
MrTsuiChiShing
MrChanPatChun(20)
MrTsuiChiShing (29)
MrLiPingFai(20)
MrWongYukHing (29)
MrTongLan San
MrSinWai Hung
MrLeungHoWah (20)
MrChenYauHip(29)
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Overview
Paper Biology CS(Bio)
1A(MC) Mean:20outof35
(i.e.58%) Mean:12outof24
(i.e.50%)
1(Mixed) ~50% ~43%
2 ~50% N.A.
SBA ~71% ~69%
Subject ~54% ~48%
Candidature 17913 4435 3
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Marking & Grading
Onscreen marking (OSM) panels
Biology CS(Bio)
1B1:Q.1,2,4,8
1B2:Q.3,7,9
1B3:Q.5,6,10
1B1:Q.1,3,6
1B2:Q.2,5
1B3:Q.4,7
2A:Human Physiology
2B:AppliedEcology
2C:Microorganisms &Humans
2D:Biotechnology
SBA marks stat. moderated with both Mean and SDadjusted (outlining cases reviewed by Supervisors) 4
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Marking & Grading
Expert Panel (Examiners, 5 ~ 6 persons) determine level
boundaries/cut scores by making reference to
Level descriptors
Group Ability Indicator (GAI)
Viewing candidate samples
CS(Bio) graded by common items and viewing candidate
samples
Endorsement by Senior Management/Exam Board
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Results
Biology
Level
Percentage
5**
1.6%
5*+
6.6%
5+
16.7%
4+
43.1%
3+
70.7%
2+
89.6%
1+
97.1%
CS(Bio)
Level
Percentage
5**
0.9%
5*+
3.5%
5+
8.7%
4+
27.8%
3+
57.7%
2+
83.5%
1+
95.3%
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12VS13 Numberofcandidatesattoplevels
Level 2012 2013
DSE5** 275 287
DSE5* 1049 1182
DSE5 2682 2992
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Paper 1A
Biology (36 MC)
%of cand.correct >70% 50%70% 70% 50%70%
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30%choseB,theydidnotawarethattheliningoftheairsacisaonecellthicklayertoallowdiffusionofgases,whichisapassiveprocessandhence,theamountofmitochondriaisrelativelylow
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34%choseB,theytreatedenzymesasmoleculesfoundincytoplasm,infact,thereareenzymesthatarelocatedonthemembrane,forinstance,somedigestiveenzymesarefoundonthemembraneofthesmallintestineratherthaninfreeforms
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33%thoughtcrossXallowsthededuction,butthereisnotenoughprooffromthiscross
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41%thoughtthatmonosaccharideswasthekey,theydidnotawarethattheabsorptionofmonosaccharidesismainlydonebyactivetransport.
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69%choseB(i.e.Q)asthekey,theydidnotawarethathavingalowerpressuremeansthatairisstillcominginfromatmosphere
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38%choseC,theymixedupantibioticswithantibodies
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Structure3isthespermduct
34%choseA,theythoughtthatthemalewouldfailtoejaculateafterthespermducthasbeentiedupandcut
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Paper1B Biology(%mark)
>60% 60%40% 60% 60%40%
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Paper2 Markequatingwasappliedtothe4questionsinpaper2usingperformanceinpaper1asareference
Afterequating:
Elective Popularity Comparewithpapermean
HumanPhysiology 95% >0.8%
AppliedEcology 62%
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Performance:BioVSCS(Bio) Commonitems Performance
Bio CS(Bio) BiovsCS(Bio)
1 1 >8%
3 2 >10%
4 3 >4%
6 4 >3%
7 5 >4%
8 6 >3%
10 7 >10%
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CorrelationbetweenwrittenexamandSBA
ExamYear Paper1 Paper2
2012 0.64 0.60
2013 0.73 0.64
MorequestionsrelatedtoSIin2013ExamP1B:
Photomicrograph:Q.3,Q.4,Q6
Experimentsetupsanddesigns:Q.6,Q.7
Graphplottingandsamplingmethod:Q.8
SubjectCommitteeagreedtokeepthelevelofdifficultyandthetypesofquestionscomparableto2013exam
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2014Exam
ExamDate:4/4/2014
Markingperiod:13/4/201410/5/2014
MarkersMeeting:12/4/2014AM(Tentative)
OSMTraining:14/4/2014PM(Tentative)
Easterpublicholidays:1821/4/2014
ReleaseofResults:14/7/2014(Tentative)
Remarking:20/7/201431/7/2014(Tentative)
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THANK YOU
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