Figure 2.

Improvement in e-mail processing time (min) over days as a function of crystallized intelligence (lines represent predictions for persons with crystallized intelligence one 1 SD below the mean and 1 SD above the mean).

Improvement in e-mail processing time (min) over days as a function of crystallized intelligence (lines represent predictions for persons with crystallized intelligence one 1 SD below the mean and 1 SD above the mean).