For example, researchers in neuroscience or bio-behavioral health might focus on pubertal changes in brain structure and its effects on cognition or social relations.Sociologists interested in adolescence might focus on the acquisition of social roles (e.g., worker or romantic partner) and how this varies across cultures or social conditions.Pubescent boys often tend to have a good body image, are more confident, secure, and more independent.Late maturing boys can be less confident because of poor body image when comparing themselves to already developed friends and peers.Some boys may develop gynecomastia due to an imbalance of sex hormones, tissue responsiveness or obesity.As with most human biological processes, this specific order may vary among some individuals.However, early puberty is not always positive for boys; early sexual maturation in boys can be accompanied by increased aggressiveness due to the surge of hormones that affect them.
The study of adolescent development often involves interdisciplinary collaborations.
Consequently, girls that reach sexual maturation early are more likely than their peers to develop eating disorders (such as anorexia nervosa).
Nearly half of all American high school girls' diets are to lose weight.
In addition to changes in height, adolescents also experience a significant increase in weight (Marshall, 1978).
The weight gained during adolescence constitutes nearly half of one's adult body weight.
The end of adolescence and the beginning of adulthood varies by country and by function.