Table 1.
Demographic and behavioral performance of PD and HC. t & p corrected for violation of equal variances if applicable.
| HC (N = 62) | PD (N = 135) | t | p | Cohen's | |||
|---|---|---|---|---|---|---|---|
| M | SD | M | SD | d | |||
| Age (years) | 65.2 | 11.9 | 65.4 | 7.7 | −.2 | .879 | −.02 |
| Education (years) | 15.9 | 2.3 | 15.4 | 2.8 | 1.3 | .198 | .19 |
| Montreal Cognitive Assessment (MoCA) | 26.6 | 2.4 | 26.3 | 2.1 | .9 | .357 | .14 |
| Beck Depression Inventory (BDI) | 2.7 | 3.2 | 8.1 | 6.2 | −8.1 | ** | −1.00 |
|
| |||||||
| STR1 RT (s) | 49.2 | 9.4 | 54.2 | 11.6 | −3.0 | .003 | −.46 |
| STR2 RT (s) | 63.7 | 12.6 | 72.0 | 15.6 | −3.7 | ** | −.57 |
| STR3 RT (s) | 113.8 | 26.6 | 136.3 | 42.4 | −4.5 | ** | −.59 |
| STR4 RT (s) | 126.6 | 31.0 | 151.4 | 56.4 | −4.0 | ** | −.50 |
| STR1 error rate (%) | .02 | .13 | .13 | .74 | −1.7 | .096 | −.18 |
| STR2 error rate (%) | .23 | .66 | .61 | 1.26 | −2.9 | .005 | −.34 |
| STR3 error rate (%) | 1.47 | 2.62 | 3.02 | 4.49 | −3.1 | .003 | −.39 |
| STR4 error rate (%) | 1.82 | 3.28 | 3.60 | 5.45 | −2.8 | .005 | −.37 |
| STR1 IES | 49.23 | 9.45 | 54.34 | 11.84 | 3.0 | .003 | −.46 |
| STR2 IES | 63.86 | 12.63 | 72.51 | 16.04 | 3.8 | ** | −.58 |
| STR3 IES | 115.61 | 27.31 | 142.02 | 50.48 | 4.8 | ** | −.60 |
| STR4 IES | 129.43 | 33.61 | 159.70 | 69.60 | 4.1 | ** | −.50 |
M = mean, SD = standard deviation
**
indicates p < .0005.