When the distribution is symmetric, which of the following are always equal?

During adolescence, most people are in the _____ stage.

A) integrity versus despair B) identity versus role confusion C) autonomy versus shame and self-doubt D) initiative versus guilt

A series of experiments by Pellegrini and associates found that exposure to physical activity during recess was associated immediately afterwards with

a. sleepiness and inattention in class. b. a reduction in the ability to concentrate and learn until later in the day. c. increased alertness and attentiveness to their school assignments. d. increased activity level and aggression during class.