Table 4.
Linear regression of long-term memory and ΔC—alternative control variables.
| Long-term verbal recall | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| A. ANTERIOR COHERENCE | ||||
| ΔCA | −1.09*** | −1.01*** | −0.72** | −0.39* |
| (0.37) | (0.37) | (0.33) | (0.19) | |
| Minus trail-making Test A | −0.02 | 0.05 | ||
| (0.06) | (0.03) | |||
| Minus trail-making Test B | 0.04 | 0.01 | ||
| (0.03) | (0.02) | |||
| RVP (A) | 10.98 | −2.45 | −8.2 | |
| (11.57) | (8.7) | (6.52) | ||
| IST2000 | 0.08* | 0.00 | ||
| (0.04) | (0.03) | |||
| Working memory (verbal, learning) | 0.23*** | |||
| (0.03) | ||||
| Birth weight | −0.33 | −0.03 | 0.13 | |
| (1.39) | (1.47) | (0.71) | ||
| Birth length | 0.07 | −20.0 | −5.49 | |
| (31.98) | (32.12) | (15.68) | ||
| Years of education | 0.06 | 0.06 | −0.02 | |
| (0.20) | (0.20) | (0.13) | ||
| Semi-partial R2 for ΔCA | 0.15 | 0.14 | 0.09 | 0.07 |
| Adjusted R2 | 0.13 | 0.15 | 0.21 | 0.71 |
| B. TOTAL COHERENCE | ||||
| ΔCT | −0.95*** | −0.73** | −0.63* | −0.34* |
| (0.33) | (0.29) | (0.33) | (0.19) | |
| Control variables (as above) | Yes | Yes | Yes | |
| Semi-partial R2 for ΔCT | 0.13 | 0.09 | 0.08 | 0.07 |
| Adjusted R2 | 0.12 | 0.09 | 0.20 | 0.71 |
| Number of individuals | 35 | 35 | 35 | 35 |
Robust standard errors in parentheses.
p < 0.10,
p < 0.05,
p < 0.01.
All specifications include a constant that was omitted from the table.
Linear regression of the long-term verbal recall and difference between monomodal and bimodal coherence (ΔCA) when controlling for bio-social factors, such as birth measures, years of education, and furthermore neurocognitive tests for speed of processing and attention. Each column represents one linear regression model. Control variables were added in a stepwise fashion, showing that the correlation between coherence and long-term memory scores was robust enough to account for these factors. Columns 1–3 were adjusted for sociodemographic factors, such as birth measures and years of education. Columns 2–3 control for each of the three cognitive test measures of speed of processing and visual attention, as well as the intelligence score (i.e., I-S-T-2000-R) and working memory using the 15-word pair learning score. The semi-partial R2 for the main explanatory variables are shown along the total adjusted R2.