This application proposes the extension to panel design of the theretical model developed in previous phases of the project of biological and social determinants of female sexual behavior in adolescence. The research design replicates insofar as possible the design of the on-going panel study of boys. One hundred white and 100 black 13-year old females will be studied for two years. The primary emphasis is to examine how changes over time in steroid hormones, attractiveness, and social controls determine changes in sexual behavior. The design is organized to explain race and sex differences which have been discovered in previous project work. An important new theoretical element is the specification of biosocial interactions, in which the strength of the relationships between social variables and sexual behavior is hypothesized to be contingent on levels of steroid hormones.

Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
University of North Carolina Chapel Hill
Schools of Medicine
Chapel Hill
United States
Zip Code
Campbell, Benjamin; Mbizo, Michael (2006) Reproductive maturation, somatic growth and testosterone among Zimbabwe boys. Ann Hum Biol 33:17-25
Campbell, Benjamin C; Prossinger, Hermann; Mbzivo, Michael (2005) Timing of pubertal maturation and the onset of sexual behavior among Zimbabwe school boys. Arch Sex Behav 34:505-16
Halpern, Carolyn Tucker; Campbell, Benjamin; Agnew, Christopher R et al. (2002) Associations between stress reactivity and sexual and nonsexual risk taking in young adult human males. Horm Behav 42:387-98
Halpern, C T; Joyner, K; Udry, J R et al. (2000) Smart teens don't have sex (or kiss much either). J Adolesc Health 26:213-25
Halpern, C T; Udry, J R; Campbell, B et al. (1999) Effects of body fat on weight concerns, dating, and sexual activity: a longitudinal analysis of black and white adolescent girls. Dev Psychol 35:721-36
Halpern, C T; Udry, J R; Suchindran, C (1998) Monthly measures of salivary testosterone predict sexual activity in adolescent males. Arch Sex Behav 27:445-65
Harlow, S D; Campbell, B; Lin, X et al. (1997) Ethnic differences in the length of the menstrual cycle during the postmenarcheal period. Am J Epidemiol 146:572-80
Halpern, C T; Udry, J R; Suchindran, C (1997) Testosterone predicts initiation of coitus in adolescent females. Psychosom Med 59:161-71
Harlow, S D; Campbell, B (1996) Ethnic differences in the duration and amount of menstrual bleeding during the postmenarcheal period. Am J Epidemiol 144:980-8
Dabbs Jr, J M; Campbell, B C; Gladue, B A et al. (1995) Reliability of salivary testosterone measurements: a multicenter evaluation. Clin Chem 41:1581-4

Showing the most recent 10 out of 20 publications