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NAEP Analysis and Scaling → Estimation of Population and Student Group Distributions → Examining the Population-Structure Models Used in NAEP → Proportion of Variance of the Group-Defining Contrasts Accounted for by the Principal Components Used in NAEP Student Group Distribution Models → Proportion of Variance of the Group-Defining Contrasts Accounted for by the Principal Components Used in the Population-Structure Model, Grade 4 U.S. History National Main Assessment (Accommodations Permitted): 2001

NAEP Technical DocumentationProportion of variance of the group-defining contrasts accounted for by the principal components used in the population-structure model, grade 4 U.S. history national main assessment (accommodations permitted [R3]): 2001

Group-defining contrast	Proportion of variance
Female	0.94
Black	0.96
Hispanic	0.95
Asian	0.93
Mexican	0.93
Puer Ric	0.96
Cubn,Oth	0.96
Hisp-?	0.93
MID CTY7	0.93
FR/LCTY7	0.94
FR/MCTY7	0.94
LAR TWN7	0.94
SML TWN7	0.94
Other	0.94
S East	0.91
Central	0.90
West	0.90
Private	0.95
Catholic	0.93
Modage	0.99
Above	0.99
Black	0.85
Hispanic	0.78
Asian	0.76
IEP-NO	0.98
LEP-NO	0.88
Title-N	0.85
RED PRIC	0.93
Free	0.76
Info N/A	0.88
SCH/REF	0.84
SCH/NP	0.88
TVLIN-0	0.98
TV-QUAD	0.97
NO ACCOM	0.97
BIL.DICT	0.90
LRG.PRT	0.96
EXT.TIME	0.95
READALOU	0.91
SMALLGRP	0.97
1 ON 1	0.94
SCRIBE	0.97
O.RELIG	0.90
G/R 22	0.90
G/R 23	0.90
G/R 24	0.96
G/T 22	0.72
G/T 23	0.72
G/T 24	0.71
G/T 25	0.91
G/T 26	0.72
G/T 27	0.69
G/S 22	0.92
G/S 23	0.90
R/T 24	0.91
R/T 25	0.91
R/T 26	0.91
R/T 27	0.94
R/T 31	0.91
R/T 32	0.93
R/T 33	0.89
R/T 34	0.90
R/T 35	0.89
R/T 36	0.94
R/T 37	0.91
R/T 41	0.91
R/T 42	0.91
R/T 43	0.92
R/T 44	0.91
R/T 45	0.90
R/T 46	0.94
R/T 47	0.95
R/S 31	0.96
R/S 32	0.96
R/S 33	0.95
R/S 41	0.94
R/S 42	0.95
R/S 43	0.95
T/S 41	0.93
T/S 42	0.93
T/S 43	0.95
T/S 51	0.95
T/S 52	0.94
T/S 53	0.94
T/S 61	0.97
T/S 62	0.96
T/S 63	0.95
T/S 71	0.94
T/S 72	0.95
A/G 22	0.81
A/R 22	0.91
A/R 23	0.90
A/R 24	0.96
A/T 22	0.94
A/T 23	0.89
A/T 24	0.91
A/T 25	0.98
A/T 26	0.91
A/S 22	0.96
A/S 23	0.97
A/I 22	0.97
A/L 22	0.92
SAMP S3	0.85
S/R 22	0.89
S/R 23	0.89
S/R 24	0.96
RPT NO	0.98
B008201B	0.92
B008201C	0.85
B008201D	0.91
B008201E	0.96
B008201F	0.97
B008201G	0.97
B008201M	0.67
B017001B	0.81
B017001I	0.81
B017001M	0.72
B000905N	0.85
B000905I	0.88
B000905M	0.73
B013801B	0.95
B013801C	0.95
B013801D	0.95
B013801M	0.74
B017101B	0.74
B017101M	0.73
B017201B	0.85
B017201I	0.90
B017201M	0.84
B017301B	0.83
B017301I	0.87
B017301M	0.85
B017401B	0.89
B017401C	0.90
B017401D	0.93
B017401E	0.88
B017401M	0.87
B017601B	0.93
B017601C	0.93
B017601D	0.88
B017601M	0.93
B017701B	0.88
B017701C	0.87
B017701M	0.90
B017801B	0.92
B017801C	0.93
B017801D	0.93
B017801E	0.88
B017801M	0.81
B017901B	0.94
B017901C	0.90
B017901D	0.87
B017901M	0.76
B018001B	0.91
B018001C	0.94
B018001D	0.95
B018001E	0.89
B018001M	0.80
B018101B	0.88
B018101C	0.89
B018101D	0.93
B018101E	0.94
B018101M	0.75
B018201B	0.90
B018201C	0.92
B018201D	0.81
B018201M	0.80
B018301B	0.79
B018301M	0.97
B018401B	0.81
B018401M	0.90
B018501B	0.89
B018501M	0.91
B018601B	0.81
B018601M	0.78
B018701B	0.89
B018701M	0.89
B018801B	0.81
B018801M	0.94
B018901B	0.83
B018901M	0.87
B019001B	0.94
B019001C	0.88
B019001D	0.86
B019001E	0.84
B019001M	0.87
B019101B	0.89
B019101C	0.87
B019101D	0.93
B019101E	0.86
B019101M	0.77
B019201B	0.92
B019201C	0.93
B019201D	0.96
B019201E	0.91
B019201M	0.81
B019301B	0.86
B019301C	0.89
B019301D	0.96
B019301E	0.94
B019301M	0.81
B019401B	0.90
B019401C	0.79
B019401M	0.88
B019501B	0.95
B019501C	0.76
B019501M	0.89
B019601B	0.85
B019601C	0.81
B019601M	0.86
G800401B	0.88
G800401C	0.89
G800401D	0.93
G800401E	0.91
G800401M	0.85
H803001N	0.95
H803001M	0.73
G801401B	0.83
G801401C	0.82
G801401M	0.88
B019701B	0.97
B019701C	0.97
B019701D	0.97
B019701E	0.96
B019701M	0.81
B019801B	0.82
B019801M	0.88
B019901B	0.93
B019901M	0.83
B020001B	0.87
B020001M	0.85
B020101B	0.75
B020101M	0.81
B020201B	0.77
B020201M	0.90
B020301B	0.81
B020301M	0.89
B020401B	0.79
B020401M	0.88
C046201M	0.88
C046202M	0.95
C046203M	0.97
C046204M	0.97
C046205M	0.92
C046206M	0.96
C046207M	0.90
C046208M	0.89
C046209M	0.94
C046210M	0.95
C046211M	0.96
C046212M	0.98
C046213M	0.98
C046214M	0.93
C046301B	0.94
C046301I	0.90
C046301M	0.93
C046302B	0.88
C046302I	0.89
C046302M	0.94
C046303B	0.87
C046303I	0.89
C046303M	0.90
C046304B	0.89
C046304I	0.89
C046304M	0.87
C038101A	0.90
C038101M	0.90
C046501B	0.91
C046501C	0.91
C046501D	0.93
C046501E	0.91
C046501F	0.91
C046501G	0.92
C046501M	0.91
C038301N	0.89
C038301M	0.94
C043801B	0.87
C043801C	0.89
C043801D	0.93
C043801E	0.91
C043801F	0.91
C043801G	0.93
C043801H	0.88
C043801M	0.90
C046610B	0.93
C046610M	0.96
C046701B	0.88
C046701C	0.88
C046701D	0.91
C046701E	0.88
C046701F	0.89
C046701G	0.91
C046701H	0.93
C046701M	0.91
C044004B	0.90
C044004C	0.91
C044004D	0.89
C044004E	0.87
C044004G	0.92
C044004M	0.92
C046702B	0.87
C046702C	0.88
C046702D	0.88
C046702E	0.89
C046702G	0.87
C046702H	0.88
C046702M	0.96
C046703B	0.90
C046703C	0.90
C046703D	0.92
C046703E	0.91
C046703F	0.89
C046703G	0.92
C046703H	0.88
C046703M	0.95
C044007B	0.89
C044007C	0.94
C044007D	0.94
C044007E	0.89
C044007F	0.89
C044007H	0.88
C044007M	0.90
C046801M	0.91
C046802M	0.90
C046803M	0.88
C046804M	0.91
C046805M	0.90
C046806M	0.90
C046807M	0.91
C046808M	0.89
C046809M	0.89
C046810M	0.90
C046811M	0.89
C046812M	0.89
C047401A	0.87
C047401M	0.88
C047501B	0.90
C047501C	0.90
C047501D	0.90
C047501E	0.90
C047501F	0.90
C047501G	0.90
C047501H	0.89
C047501M	0.94
C047601B	0.93
C047601M	0.92
C047701B	0.88
C047701M	0.94
C047702B	0.88
C047702M	0.92
C047801B	0.90
C047801C	0.90
C047801D	0.90
C047801E	0.92
C047801F	0.92
C047801M	0.90
C047802B	0.89
C047802C	0.88
C047802D	0.88
C047802E	0.90
C047802F	0.89
C047802M	0.92
C047803B	0.90
C047803C	0.89
C047803D	0.88
C047803E	0.88
C047803F	0.89
C047803M	0.92
C047901B	0.91
C047901C	0.88
C047901D	0.90
C047901E	0.89
C047901F	0.89
C047901M	0.90
C047902B	0.89
C047902C	0.90
C047902D	0.92
C047902E	0.91
C047902F	0.91
C047902M	0.90
C047903B	0.88
C047903C	0.90
C047903D	0.89
C047903E	0.87
C047903F	0.90
C047903M	0.91
C048101B	0.92
C048101I	0.90
C048101M	0.95
C048201B	0.90
C048201I	0.87
C048201M	0.99
C048202B	0.90
C048202I	0.87
C048203B	0.90
C048203I	0.88
C048203M	0.99
C048204B	0.90
C048204I	0.93
C048204M	0.98
C048205B	0.92
C048205I	0.91
C048206B	0.90
C048206I	0.89
C048206M	0.97
C048207B	0.87
C048207I	0.87
C048207M	0.98
C048301B	0.92
C048301C	0.93
C048301D	0.92
C048301M	0.95
C048302B	0.90
C048302C	0.92
C048302D	0.91
C048302M	0.96
C048303B	0.89
C048303C	0.90
C048303D	0.87
C048303M	0.95
C048304B	0.90
C048304C	0.90
C048304D	0.88
C048304M	0.96
C048305B	0.90
C048305C	0.88
C048305D	0.90
C048305M	0.96
C048401B	0.87
C048401M	0.99
C048402B	0.90
C048402M	0.96
C048403B	0.86
C048403M	0.97
C048404B	0.88
C048405B	0.87
C048405M	0.99
C048406B	0.88
C048406M	0.97
C048407B	0.87
C048407M	0.95
C048408B	0.88
C048408M	0.98
C048409B	0.89
C048409M	0.96
C048410B	0.90
C048501B	0.88
C048501M	0.92
C048502B	0.88
C048502M	0.93
C048503B	0.86
C048503M	0.94
C048504B	0.88
C048504M	0.95
C048505B	0.87
C048505M	0.95
C048601B	0.90
C048602B	0.89
C048602M	0.97
C048603B	0.88
C048603M	0.94
C048701B	0.88
C048701M	0.97
C048702B	0.90
C048702M	0.98
C048703B	0.89
C048704B	0.87
T077101A	0.86
T077101M	0.88
T077201B	0.88
T077201C	0.88
T077201D	0.89
T077201E	0.87
T077201F	0.88
T077201M	0.86
T077301B	0.90
T077301N	0.92
T077301M	0.95
T077302B	0.88
T077302N	0.94
T077302M	0.96
T077303B	0.90
T077303N	0.93
T077303M	0.94
T077304B	0.89
T077304N	0.90
T077304M	0.92
T077305B	0.91
T077305N	0.92
T077305M	0.94
T077306B	0.89
T077306N	0.90
T077306M	0.93
T077307B	0.91
T077307N	0.91
T077307M	0.90
T077308B	0.85
T077308N	0.85
T077308M	0.90
T077401B	0.88
T077401N	0.96
T077401M	0.98
T077402B	0.88
T077402N	0.97
T077402M	0.98
T077403B	0.87
T077403N	0.94
T077403M	0.95
T077404B	0.86
T077404N	0.91
T077404M	0.96
T077405B	0.88
T077405N	0.89
T077405M	0.94
T077406B	0.86
T077406N	0.95
T077406M	0.96
T077407B	0.90
T077407N	0.94
T077407M	0.92
T077408B	0.87
T077408N	0.84
T077408M	0.88
T082001B	0.87
T082001C	0.89
T082001D	0.89
T082001M	0.96
T082002B	0.88
T082002C	0.89
T082002D	0.87
T082002M	0.95
T082003B	0.89
T082003C	0.87
T082003D	0.84
T082003M	0.97
T077501N	0.82
T077501M	0.95
T077502N	0.84
T077502M	0.96
T077503N	0.84
T077503M	0.92
T077504N	0.82
T077504M	0.96
T077505N	0.82
T077505M	0.96
T077506N	0.83
T077506M	0.96
T077507N	0.83
T077507M	0.95
T077508N	0.83
T077508M	0.95
T077509N	0.83
T077509M	0.94
T077510N	0.83
T077510M	0.97
T077601N	0.82
T077601M	0.98
T077701B	0.93
T077701C	0.91
T077701D	0.89
T077701E	0.88
T077701M	0.97
T077801N	0.91
T077801M	0.96
T077802N	0.91
T077802M	0.96
T077803N	0.89
T077803M	0.96
T077901B	0.86
T077901C	0.87
T077901D	0.86
T077901E	0.86
T077901M	0.94
T077902B	0.88
T077902C	0.90
T077902D	0.87
T077902E	0.92
T077902M	0.91
T077903B	0.88
T077903C	0.87
T077903D	0.89
T077903E	0.88
T077903M	0.93
T077904B	0.88
T077904C	0.88
T077904D	0.87
T077904E	0.87
T077904M	0.94
T078001N	0.85
T078001M	0.96
T078101B	0.88
T078101C	0.93
T078101D	0.92
T078101M	0.97
T078102B	0.88
T078102C	0.89
T078102D	0.89
T078102M	0.97
T078103B	0.88
T078103C	0.90
T078103D	0.88
T078103M	0.97
T078201B	0.88
T078201C	0.92
T078201D	0.89
T078201M	0.98
T078301B	0.92
T078301C	0.93
T078301D	0.91
T078301E	0.87
T078301M	0.96
T078401A	0.89
T078401M	0.94
T078501A	0.86
T078501M	0.93
T078601A	0.88
T078601M	0.94
T078701B	0.86
T078701C	0.85
T078701D	0.88
T078701M	0.96
T078702B	0.87
T078702C	0.89
T078702D	0.88
T078702M	0.97
T078703B	0.87
T078703C	0.88
T078703D	0.85
T078703M	0.96
T078801B	0.88
T078801C	0.89
T078801D	0.90
T078801E	0.96
T078801M	0.96
T078802B	0.87
T078802C	0.90
T078802D	0.87
T078802E	0.97
T078802M	0.97
T078803B	0.87
T078803C	0.90
T078803D	0.89
T078803E	0.97
T078803M	0.96
T078804B	0.88
T078804C	0.91
T078804D	0.89
T078804E	0.98
T078804M	0.96
T078805B	0.88
T078805C	0.90
T078805D	0.89
T078805E	0.97
T078805M	0.95
T082101M	0.88
T082102M	0.88
T082103M	0.85
T082201M	0.89
T082202M	0.90
T082203M	0.88
T082301M	0.87
T082302M	0.89
T082303M	0.85
T082401M	0.87
T082402M	0.89
T082403M	0.87
T082501M	0.86
T082502M	0.90
T082503M	0.91
T082601M	0.85
T082602M	0.90
T082603M	0.91
T082701M	0.89
T082702M	0.90
T082703M	0.89
T082801M	0.88
T082802M	0.90
T082803M	0.91
T082901M	0.87
T082902M	0.89
T082903M	0.91
T079001B	0.90
T079001C	0.92
T079001D	0.89
T079001E	0.90
T079001F	0.88
T079001G	0.88
T079001M	0.93
T079101B	0.88
T079101C	0.89
T079101D	0.90
T079101I	0.85
T079101M	0.96
T079102B	0.87
T079102C	0.90
T079102D	0.89
T079102I	0.84
T079102M	0.95
T079103B	0.86
T079103C	0.87
T079103D	0.89
T079103I	0.87
T079103M	0.95
T079104B	0.88
T079104C	0.86
T079104D	0.90
T079104I	0.89
T079104M	0.95
T079201A	0.86
T079201M	0.96
T079301A	0.82
T079301M	0.92
T079401A	0.85
T079401M	0.92
T079501B	0.89
T079501C	0.83
T079501M	0.91
T079601B	0.86
T079601C	0.88
T079601M	0.95
T079701B	0.89
T079701C	0.93
T079701D	0.93
T079701E	0.89
T079701M	0.94
T079801B	0.90
T079801C	0.91
T079801D	0.91
T079801E	0.90
T079801F	0.88
T079801M	0.92
T079802B	0.89
T079802C	0.92
T079802D	0.91
T079802E	0.89
T079802F	0.87
T079802M	0.92
T079901B	0.89
T079901C	0.94
T079901D	0.94
T079901E	0.87
T079901M	0.93
T081601B	0.86
T081601C	0.86
T081601D	0.86
T081601M	0.97
T081602B	0.91
T081602C	0.93
T081602D	0.89
T081602M	0.95
T081603B	0.88
T081603C	0.95
T081603D	0.94
T081603M	0.95
T081604B	0.87
T081604C	0.95
T081604D	0.93
T081604M	0.96
T081701B	0.90
T081701C	0.89
T081701D	0.87
T081701M	0.97
T081701B	0.89
T081701C	0.92
T081701D	0.89
T081702M	0.94
T081703B	0.90
T081703C	0.94
T081703D	0.92
T081703M	0.95
T081704B	0.88
T081704C	0.92
T081704D	0.87
T081704M	0.94
T081801B	0.88
T081801C	0.88
T081801D	0.86
T081801E	0.89
T081801M	0.96
T080001B	0.87
T080001C	0.83
T080001D	0.85
T080001M	0.96
T080002B	0.91
T080002C	0.91
T080002D	0.85
T080002M	0.98
T080101B	0.86
T080101C	0.87
T080101D	0.85
T080101M	0.98
T080102B	0.87
T080102C	0.86
T080102D	0.87
T080102M	0.98
T080103B	0.85
T080103C	0.88
T080103D	0.85
T080103M	0.97
T080104B	0.87
T080104C	0.87
T080104D	0.87
T080104M	0.98
T080105B	0.87
T080105C	0.85
T080105D	0.85
T080105M	0.98
T080106B	0.86
T080106C	0.87
T080106D	0.85
T080201B	0.86
T080201C	0.89
T080201D	0.88
T080201M	0.94
T080202B	0.88
T080202C	0.88
T080202D	0.87
T080202M	0.95
T080203B	0.88
T080203C	0.93
T080203D	0.92
T080203M	0.97
T080204B	0.87
T080204C	0.86
T080204D	0.86
T080204M	0.95
T080301B	0.91
T080301C	0.94
T080301D	0.89
T080301M	0.91
T080302B	0.90
T080302C	0.92
T080302D	0.87
T080302M	0.95
T080303B	0.87
T080303C	0.89
T080303D	0.86
T080303M	0.93
TCHMTCHB	0.98
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001 U.S. History Assessment.

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