Insight Psychometrics Technical Manual - Canadian Test Centre

Table of figuresFigure 1 Test levels and grade ranges............................................................................1Figure 2 Subtests and number of items by level............................................................1Figure 3 Item overlaps for a typical subtest ..................................................................2Figure 4 Composite scores...............................................................................................2Figure 5 Discrepancy scores and reports .......................................................................3Figure 6 Ability/achievement discrepancy .....................................................................3Figure 7 Subtests and number of items by level for the initial development forms....4Figure 8 Subtests and number of items by level for the later development forms ......4Figure 9 Development/norming sample sizes ................................................................5Figure 10 Geographic distribution of norming samples................................................5Figure 11 Regional Anglophone populations, samples, and weights............................6Figure 12 Illustration of Rasch model for vertical scaling ............................................8Figure 13 Glr regression by age and level....................................................................10Figure 14 Transformation of standard scores to NPR and stanine ............................12Figure 15 Example of an item regressed on age and level..........................................14Figure 16 Distributions of standard scores of subtests and summaries ....................15Figure 17 Correlation of age and subtest and summary standard scores..................16Figure 18 Example of graph of NPR confidence bounds .............................................17Figure 19 Differential item functioning in the final development items in Gc, Gv,and Gf......................................................................................................................19Figure 20 Insight compared to WISC IV and Woodcock-Johnson III.........................20Figure 21 Internal correlations for Rasch thetas and standard subtest scores .........21Figure 22 Correlations of Insight and CAT·4 and age.................................................22Figure 23 Partial correlations of Insight and CAT·4 controlling age .........................22Figure 24 Regression analyses of CAT·4 standard scores on Insight subtests ..........23Figure 25 Standard errors of measurement for CAT·4 standard scores by level.......24ii