Task 3 hormonal changes during puberty how it affects behavior changes that occur in puberty influence on risk taking behavior why is teenager sleep rhythm different. Forbes pubertal development and behavior: hormonal activation of social and. Motivational tendencies focus: behavioral changes during adolescence, with an emphasize on the increase in reproductive hormones instrumental for development. Interaction between motivational tendencies and social context. Activate gonads: actually, re-activation of specific neuroendocrine systems also in infancy, activation hpg (gonadal) axis, activation hpa axis. Findings indicate that puberty influences brain systems that play a role in processing affective and social stimuli. Crone understanding adolescence as a period of social-cognitive engagement and goal. Fundamental maturation task of adolescence is achieving adult social competence. B striatum activation in reward processing (risk taking and reward) + motivational experiences creates new challenges to emotional regulation + self- control.