Insight Psychometrics Technical Manual - Canadian Test Centre

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Figure 21 Internal correlations for Rasch thetas and standard subtest scoresRasch Gc Gv Gsm Glr Gf Ga GsthetasGc .37 .43 .33 .37 .32 .33Gv .37 .32 .31 .35 .26 .27Gsm .43 .32 .29 .28 .30 .36Glr .33 .31 .29 .28 .35 .18Gf .37 .35 .28 .28 .26 .21Ga .32 .26 .30 .35 .26 .12Gs .33 .27 .36 .18 .21 .12StandardscoresGc .24 .22 .28 .26 .34 .12Gv .24 .18 .25 .29 .23 .16Gsm .22 .18 .21 .19 .28 .20Glr .28 .25 .21 .25 .32 .13Gf .26 .29 .19 .25 .25 .11Ga .34 .23 .28 .32 .25 .10Gs .12 .16 .20 .13 .11 .1021
Connection to Canadian Achievement Tests (CAT·4)One optional result from Insight is an individual discrepancy analysisbetween CAT·4 scores and those scores predicted from Insight scores and age.This requires information on the three Insight subtests Gc, Gv, and Gf and amatch between Insight and CAT·4 scores. The CAT·4 standard scores forReading, Writing Conventions, and Mathematics are used. The analysis isdone separately, so results can be provided for any or all of them.The prediction equations were developed from a sample of 4,329 cases withmatching data for Insight and CAT·4 found across the four developmentalsamples (see Figure 9). For this population, the correlations between andacross Insight and CAT·4 and with age are shown in Figure 22. Allcorrelations are statistically significant, except for those between age and theInsight subtests, which are age-normed.Figure 22: Correlations of Insight and CAT·4 and ageAge CAT·4ReadingCAT·4W ConvCAT·4MathInsightGcInsightGvInsightGfAge .61 .43 .63 .00 –.01 –.01Reading .61 .75 .78 .49 .28 .32W Conv .43 .75 .72 .49 .31 .40Math .63 .78 .72 .42 .40 .40Gc .00 .49 .49 .42 .34 .37Gv –.01 .28 .31 .40 .34 .42Gf –.01 .32 .40 .40 .37 .42Since CAT·4 is developmental with age and Insight is age-normed, a betterindication of the cross-correlations is obtained by partialling by age, as shown inFigure 23. All the partial correlations are higher than the simple correlations.Figure 23: Partial correlations of Insight and CAT·4 controlling ageCAT·4ReadingCAT·4W ConvCAT·4MathInsightGcInsightGvInsightGfReading .69 .64 .60 .35 .42W Conv .69 .64 .55 .36 .47Math .64 .64 .51 .50 .52Gc .60 .55 .51 .34 .37Gv .35 .36 .50 .34 .42Gf .42 .47 .52 .37 .4222
Page 1 and 2: InsightTechnical ManualRichard Wolf
Page 3 and 4: Table of figuresFigure 1 Test level
Page 5 and 6: 29 in Level 2. Notice that some ite
Page 7 and 8: Development stepsThe items were wri
Page 9 and 10: Figure 11: Regional Anglophone popu
Page 11 and 12: Practically, this means that the Le
Page 13 and 14: Figure 13: Glr regression by age an
Page 15 and 16: 6) From the final scores, national
Page 17 and 18: Statistical analysesItem statistics
Page 19 and 20: of the correlations of the underlyi
Page 21 and 22: Validity analysesCheck on gender bi
Page 23: Figure 20: Insight compared to WISC
Page 27 and 28: Figure 25: Standard errors of measu
Page 29: Appendix A. Item locations and stan
Page 51: Appendix C. Item-age regressions fo

Insight Psychometrics Technical Manual - Canadian Test Centre

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