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Appendix
EARLY ADOLESCENCE
(11-14)
Begin separation from parents
Peer group influence begins
Same sex group activities
Comparison of body changes with
  same sex peers
MIDADOLESCENCE
(14-17)
Peak of conflicts with parents;
  test limits
Peer influence and conformity at
  highest level
Sexual behaviors (both same and
  opposite sex) increase
Risk-taking behaviors increase
LATE          YOUNG ADULT
ADOLESCENCE   (17-21)
Close friendships
Intimacy issues of increasing
  importance
Rapprochement with parents
Career goals defined
Focus on body changes:
  "Am I normal!?"
Peer group influence begins
Early formal operational thinking,
  poor futurity orientation
Beginning of increase in sexual drives
Imaginary audience behavior;
  narcissism, egocentrism
Focus on personal/sexual Identity:
  "Who Am I?"
Autonomy is chief concern
More future-oriented
Formal operational thinking estab-
  lished (may regress under stress)
Acceptance of body changes
Onset of secondary sexual
characteristics before 8 in girls and
9 in boys is precocious puberty
PUBER
T
A
L
 EVENTS
PSYCHOLOGICAL
PSYCHSOCIAL
Absence of secondary sexual de-
velopment by age 13 in girls and 14 in boys
is considered delayed puberty
Focus on identity in relation to
  society:  "What is my role in relation
  to society?"
Formal operational thinking well
  established
Future-oriented realistic goals
B2
B3
B4
B5
PHV
PH2
G2
                            The temporal relation between the biologic, psychologic, and psychosocial events of
adolescence. Age limits for the events and stages are approximations and may differ from those used
by other authors. The mean age of onset of pubic hair development for males (=13.4) is likely too
high due to bias in the data collection method. These limits and the points indicating the attainment
of individual stages of puberty were chosen for consistency and to reflect the earlier maturation of
American versus British adolescents. PH2, 3, 4, 5––pubic hair stage2, 3, etc; B2, 3, 4, 5–breast stage
2, 3, etc; PHV––peak height velocity; G2, 3, 4, 5––genital stage2, 3, etc.
AGE (YEARS)
11
12
13
14
15
16
17
G3
Spermache
PHV
PH2
PH3 PH4
PH5
Apex of
strength spurt
G4
G5
PH3
PH4
45%
50%
Percent of cycles that are ovulatory
20-
90%
80-
PH5
Menarche
FIG. 5.1