Fig. 1.

Hormone and Behavioral Results. (Left) Scatterplot shows chronological age was positively correlated with testosterone, such that older youth had higher levels of endogenous testosterone. (Right) The sensory detection task paradigm consisted of a visually-presented grating stimulus. Participants were instructed to push a button when the stimulus was detected. The scatterplot shows that more mature children with higher testosterone levels performed better on the task (i.e., had faster reaction times). This effect remained significant when controlling for age (r = −.31, p = .01). Note that males and females are plotted separately, though we did not detect significant sex differences in either correlation.