Table 3.
Measures for visual short-term memory and mental rotation for participants with autism spectrum disorder (ASD) and typical development (TD)
| Task | ASD M (SD) | TD M (SD | t(df) | p | Cohen’s d |
|---|---|---|---|---|---|
| Brooks matrix taska | |||||
| Total correct (out of 24) | 12.92 (4.87) | 12.04 (5.30) | .61 (48) | .54 | .17 |
| Maximum level (out of 8) | 6.12 (1.62) | 6.08 (1.96) | .08 (48) | .94 | .02 |
| Trials attempted (out of 24) | 17.52 (3.94) | 17.28 (5.00) | .19 (48) | .85 | .05 |
| Manikin taskb | |||||
| Average accuracy | .91 (.14) | .83 (.16) | 1.89 (46) | .07 | .55 |
| Average RT in ms | 2964.46 (1215.11) | 3195.15 (1144.24) | .68 (46) | .50 | .20 |
| Mental rotations test | |||||
| Sum of credits (out of 24) | 8.08 (6.09) | 7.04 (4.51) | .70 (50) | .49 | .19 |
| Trials attempted (out of 24) | 15.23 (5.70) | 14.42 (5.11) | .54 (50) | .59 | .15 |
aOnly 25 TD and 25 ASD individuals completed this task
bOne ASD individual did not complete this task. A further 2 ASD and 1 TD participants were excluded because they were at chance in discriminating between right and left in the control task. For both tasks, the remaining participants in both groups were still matched on VIQ, PIQ, FIQ, age (tmax = -.81, pmax = .42, Cohen’s dmax = .23) and gender (X2max = 2.93, pmax = .09).