ABSTRACT
In the current study we examined individual growth curves of frequency of sexual intercourse among a sample of urban, low-income, African American youth at increased risk for subsequent HIV/AIDS exposure. Three waves of longitudinal data from the Collaborative HIV-Prevention Adolescent Mental Health (CHAMP) project were utilized. Participant ages ranged from 9 to 12 years (M = 11 years) at the first interview wave and from 15 to 19 years (M = 18 years) at the final interview wave. As such, we were able to map out true developmental 60trajectories of sexual intercourse over a 10-year period of adolescence (spanning ages 9 to 19 years). Results indicate that the average study participant was sexually abstinent (in terms of intercourse) during the pre-teen years, reported a single episode of sexual intercourse between ages 14 and 15, and by age 19, reported between 3 and 10 episodes of sexual intercourse. Significant variability in the acceleration of growth rates (as captured by a quadratic random effect) was observed, suggesting that some youth accelerated more rapidly (in their sexual intercourse histories) than did others. Participant gender predicted trajectory starting points; boys reported higher rates of sexual intercourse at age 12. Frequency of baseline exposure to sexual possibility situations (i.e., being in mixed-sex company in a private place in the absence of adult supervision) predicted growth curve acceleration, suggesting pre-teens with more exposure to sexual possibility situations accelerated more rapidly in their rates of sexual intercourse over time. Developmental implications of these data are discussed. doi:10.1300/J200v05n01_03 [Article copies available for a fee from The Haworth Document Delivery Service: I-800-HAWORTH. E-mail address: <docdelivery@haworthpress.com> Website: <https://www.HaworthPress.com> © 2007 by The Haworth Press, Inc. All rights reserved.]
