Table 2. Summary statistics for the linear models testing for association between TVA parameters (dependent variables) and group (case-control comparisons).
| Parameter | Group | Age | Sex | |
|---|---|---|---|---|
| K | estimate (std.error) | −0.334 (0.104) | −0.020 (0.005) | −0.138 (0.102) |
| t (p) | −3.207 (0.002)* | −3.910 (<.001)* | −1.349 (0.179) | |
| Cohen’s d | −0.447 | −0.545 | −0.188 | |
| C | estimate (std.error) | −6.585 (1.983) | −0.337 (0.099) | 2.368 (1.951) |
| t (p) | −3.321 (0.001)* | −3.389 (0.001)* | 1.214 (0.226) | |
| Cohen’s d | −0.463 | −0.472 | 0.169 | |
| t0 | estimate (std.error) | 7.828 (2.435) | 0.407 (0.122) | −6.684 (2.395) |
| t (p) | 3.215 (0.002)* | 3.334 (0.001)* | −2.790 (0.006)* | |
| Cohen’s d | 0.448 | 0.465 | −0.389 | |
| error rate | estimate (std.error) | −0.021 (0.013) | 0.000 (0.001) | −0.003 (0.012) |
| t (p) | −1.676 (0.095) | −0.015 (0.988) | −0.273 (0.785) | |
| Cohen’s d | −0.234 | −0.002 | −0.038 | |
Notes.
*
Significant after Bonferroni correction.
K = short-term memory capacity; C = perceptual processing speed; t0 = perceptual threshold. Estimate = unstandardized regression coefficients b; std.error = standard error; t = t-value; p = p-value.
Cohen’s D was calculated using two times the t-value divided by the square root of the degrees of freedom.