Final answer:
G. Stanley Hall, an American Psychologist, described adolescence as a time of 'storm and stress' but recent studies often contradict the extent of turmoil he suggested. Modern research shows that adolescence conflicts are typically about daily issues and that impulsive behavior is not necessarily linked to increased brain activity in adolescents.
Step-by-step explanation:
The American Psychologist who referred to adolescence as "storm and stress" is G. Stanley Hall. Hall believed that this period was marked by intense emotional turmoil for most individuals. This theory has since been challenged by further research on adolescent development. While there may be conflicts during adolescence, they often pertain to everyday disagreements with parents over things like homework, money, etc. Modern research suggests that these conflicts tend to diminish as adolescents grow older. Additionally, findings on the adolescent brain, such as those from Galvan et al. (2007), show that there may not be a strong correlation between brain activity in the neural reward center and impulsivity. Instead, the activity is related to risk-taking behavior, indicating that adolescents do take risks, but are not necessarily more impulsive than other age groups. A subsequent development stage, emerging adulthood, focuses on exploring identity, especially concerning work and love.