Table 2 Descriptive statistics and group comparison statistical differences for global cognitive measures, BVRT errors, and CMS types of subtests
|  | 22q11.2DS participants N = 71 | TD participants N = 49 | Statistical differences between groups | Effect size | ||
|---|---|---|---|---|---|---|
Mean (SD) | Median | Mean (SD) | Median | Â | Â | |
Global cognitive measures | ||||||
 FSIQ | 71.38 (11.85) |  | 105.41 (9.00) |  | p < 0.001 | η2 = 0.71 |
 PIQ | 70.85 (11.43) |  | 102.43 (12.5) |  | p < 0.001 | η2 = 0.63 |
 VIQ | 78.09 (14.19) |  | 106.81 (9.73) |  | p < 0.001 | η2 = 0.56 |
BVRT errors | ||||||
 Total of memory errors | 7.75 (4.26) | 7.00 | 4.29 (2.14) | 4.00 | p < 0.001 | r = −0.42 |
 Object memory errors | 4.27 (3.30) | 3.00 | 2.02 (1.36) | 2.00 | p < 0.001 | r = −0.36 |
 Spatial memory errors | 2.73 (1.98) | 3.00 | 1.82 (1.39) | 2.00 | p = 0.011 | r = −0.23 |
 Total of copy errors | 3.06 (2.48) | 2.00 | 1.18 (1.42) | 1.00 | p < 0.001 | r = −0.42 |
 Object copy errors | 1.55 (1.96) | 1.00 | 0.45 (0.77) | 0.00 | p < 0.001 | r = −0.38 |
 Spatial copy errors | 1.45 (1.56) | 1.00 | 0.73 (1.42) | 0.00 | p = 0.004 | r = −0.26 |
CMS types of subtests | ||||||
 CMS ventral subtests | 6.47 (2.63) |  | 10.20 (2.52) |  | p < 0.001 | η2 = 0.34 |
 CMS dorsal subtests | 7.71 (2.59) |  | 10.47 (2.50) |  | p < 0.001 | η2 = 0.22 |
 CMS mixed subtests | 7.54 (2.76) |  | 10.17 (2.61) |  | p < 0.001 | η2 = 0.19 |