FIG. 2.

Responses on the Drug Effects Questionnaire (DEQ). Mean ± SEM change in DEQ responses from placebo after 2 mg/kg of caffeine in prepubertal (top) and postpubertal (bottom) males (black bars) and females (gray bars). In both pre- and postpubertal participants, there were sex differences in reporting of feeling different and liking the caffeine, but sex differences in feeling high and wanting more were only observed in postpubertal participants. * = significantly different from males; p < 0.05.