Table 3. Comparison of scores in the intellectual assessment test according to the groups.
| Measure | Group (N) | Average | SD | t(p-value) | Cohen’s d |
|---|---|---|---|---|---|
| IQ | ID (69) | 61.87 | 5.24 | -16.22 (<0.001) | -3.55 |
| ASD (37) | 87.90 | 17.00 | |||
| VCI | ID (69) | 68.20 | 6.87 | -10.10 (<0.001) | -2.21 |
| ASD (37) | 93,57 | 18,19 | |||
| POI | ID (69) | 69.03 | 8.98 | -12.88 (<0.001) | -2.82 |
| ASD (37) | 98.87 | 13.65 | |||
| WMI | ID (69) | 63.54 | 9.94 | -10.31 (<0.001) | -2.25 |
| ASD (37) | 87.40 | 11.96 | |||
| PSI | ID (69) | 66.97 | 10.55 | -9.99 (<0.001) | -2.19 |
| ASD (37) | 89.73 | 10.03 |
Abbreviations: ID, intellectual disability; ASD, autism spectrum disorder; SD, standard deviation; IQ, intelligence quotient; VCI, verbal comprehension index; POI, perceptual organization index; WMO, working memory index; PSI, processing speed index; t, t-test.
Notes: p significance level (p < 0.001); Cohen’s d: effect size.