Alexandra M. Columbus 
Advances in Psychology Research. Volume 75 [PDF ebook] 

This continuing series presents original research results on the leading edge of psychology. Each article has been carefully selected in an attempt to present substantial results across a broad spectrum. This book reviews research on self-concept and healthy lifestyles in adolescence; knowledge, attitudes and behaviors associated with HIV/AIDS; contingency theory; gender differences in proneness to depression and preadolescent and early adolescent friendships and adulthood adjustment.