This longitudinal study examined the relation between puberty, as measured
by both pubertal status and timing, and adjustment problems, as measured by
externalized hostile feelings and internalized distress symptoms, among ad
olescent males in grades 7 through 10. The results showed that boys who wer
e physically more developed in grade 7, compared with their less physically
developed peers, manifested more externalized hostile feelings and interna
lized distress symptoms in grades 8 through 10. Pubertal timing was signifi
cantly related to both internalized distress and externalized hostile feeli
ngs. This relation remained statistically significant, even after controlli
ng for grade 7 maladjustment symptoms and concurrent stressful life events.
Several significant interaction effects emerged between pubertal timing an
d concurrent stressful life events. The significant long term effect of the
pubertal transition, independent of stressful life experiences and symptom
continuity suggests that the past undifferentiated view of the favorable i
nfluence of early maturation on males needs to be modified.