Insight Psychometrics Technical Manual - Canadian Test Centre

The data for the initial and later development forms were collected in fourwaves: Fall 2009, Winter 2010, Spring 2010, and Fall 2010. The initialdevelopment forms were used in the first two waves and the laterdevelopmental forms were used in the last two waves. There were largeCanadian samples in all cases, as indicated in Figure 9.Figure 9: Development/norming sample sizesLevel 1 Level 2 Level 3Fall 2009 1371 1511 2121Winter 2010 1752 1630 2023Spring 2010 3203 2151 4151Fall 2010 1183 1256 869Total 7509 6548 9164The total set of item and test form development data was used for thenorming of Insight. This was possible because there were common itemsbetween levels and between the initial development forms and the laterdevelopment forms. As a result, all the items could be jointly calibrated andequated. The norming sample was national, with the division by provincesshown in Figure 10. The total sample size was 23,221.Figure 10: Geographic distribution of norming samplesSample size in each development stageSample location Initial LaterAB 1765 2591BC 3683 585MB 20 928NB 169 38NL 0 101NS 169 1111NT 303 298ON 3778 5008QC 223 938SK 298 1215Total 10408 12813To provide national representation in the Insight norming, as describedbelow, the development sample data were re-weighted in the analysis. Thiswas done by regions as shown in Figure 11.5