Fig. 2: Performance and intraindividual variability (IIV) across the study, including random effects.

Predicted values for the mean and IIV, computed from the posterior distribution. Bold lines represent the group, and thinner lines represent random effects. The processing speed model is based on 9358 observations from 152 participants, the working memory updating model is based on 9312 observations from 152 participants, and the spatial working memory model is based on 9332 observations from 152 participants.