The purpose of this study was to examine the relationship between intr
ospectiveness and the theoretically related variables of close friend
solidarity, self-esteem, and symptom patterns in early middle, and lat
e adolescents, us well as in young adults. Samples of early (n = 103),
middle (n = 107), and late adolescents (n = 101) as well as young adu
lts (n = 70) completed the Introspectiveness Scale, the Close Friend S
olidarity Instrument, the Rosenberg Self-Esteem Scale, and the Symptom
Pattern Scale in classroom settings. Hypotheses were tested using Pea
rson correlations, with a one-tailed test of significance. Introspecti
veness was statistically, significantly and positively related to clos
e friend solidarity in all adolescents but not in young adults; intros
pectiveness was statistically, significantly and inversely related to
self-esteem in all adolescents but not in young adults. Finally, intro
spectiveness was statistically, significantly, and positively related
to symptom patterns in all adolescents and in young adults.