Figure 2.

Experimental design and performance on the fMRI Cattell task. (a) The task consisted of eight 30-second blocks with two difficulties (Easy and Hard). In each trial (each row in grey and green panels), participants selected the odd-one-out of four patterns by pressing a corresponding button with one of their fingers (green and red button presses for correct and incorrect responses, respectively). (b) scatter plots of the relationship between performance on fMRI Cattell task and age (left panel) and performance on the standard Cattell task, where participants age is colour coded using yellow-purple gradient palette (right panel).