Table 4.
Age effects on mean univariate SM effects and spread of multivariate SM effects in the STM task
| ROI/ measure | Model |
Linear |
Quadratic |
|||||
|---|---|---|---|---|---|---|---|---|
| F | p | t | radj2 | p | T | radj2 | p | |
| Mean univariate STM activation | ||||||||
| PFC | 4.57 | 0.0128 | 3.01 | 0.0553 | 0.00336 | −0.505 | — | 0.615 |
| PVC | 9.43 | 0.000187 | 4.28 | 0.119 | <0.0001 | −0.988 | — | 0.324 |
| PFC-PVC | 0.606 | 0.548 | −0.587 | — | 0.559 | −0.878 | — | 0.380 |
| Multivariate spread (SD) of STM activity | ||||||||
| PFC | 13.4 | <0.0001 | 0.662 | — | 0.507 | −5.03 | 0.162 | <0.0001 |
| PVC | 9.30 | 0.000210 | −1.01 | — | 0.308 | −4.07 | 0.108 | <0.0001 |
| PFC-PFC | 3.00 | 0.0547 | 0.674 | — | 0.497 | 2.26 | 0.0250 | 0244 |
PFC-PVC refers to analyses in which the dependent variable was the difference in each measure between PFC and PVC. n = 96.