Michael Hennessy

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Adolescence is a period of heightened experimentation with risky behavior. Models of brain development suggest that this phenomenon is partly the result of increased adolescent sensation seeking unaccompanied by maturation in ability to evaluate risks. We test an alternative biosocial-affect model in which favorable affect attached to behavior leads to(More)
OBJECTIVES To examine how sources of sexual information are associated with adolescents' behavioral, normative, and control beliefs about having sexual intercourse using the integrative model of behavior change. METHODS Survey data from a quota sample of 459 youth. RESULTS The most frequently reported sources were friends, teachers, mothers, and media.(More)
OBJECTIVE We identified household, child, and demographic characteristics associated with not having a smoking ban and having a rule about smoking in the presence of children in an urban population. METHOD We conducted a cross-sectional random digit dial telephone survey (n=456) of Philadelphia parents in June 2012. RESULTS Forty-eight percent of homes(More)
Using a longitudinal web-based survey of adolescents 14-16 years of age, we estimate regression models where self-reported sexual behavior and content analytic-based exposure to sex in the media are related cross-sectionally and longitudinally. We find evidence for both cross-sectional non-recursive and prospective longitudinal relationships even after(More)
OBJECTIVE To examine US public opinion on sex education in schools to determine how the public's preferences align with those of policymakers and research scientists. DESIGN Cross-sectional survey. SETTING July 2005 through January 2006. PARTICIPANTS Randomly selected nationally representative sample of US adults aged 18 to 83 years (N = 1096). MAIN(More)
A meta-analysis of 150 research reports summarizing the results of multiple behavior domain interventions examined theoretical predictions about the effects of the included number of recommendations on behavioral and clinical change in the domains of smoking, diet, and physical activity. The meta-analysis yielded 3 main conclusions. First, there is a(More)
BACKGROUND Routine HIV testing is recommended for all adolescents ages 13 years and older. This study aims to report the prevalence of HIV testing among black adolescents, describe characteristics of adolescents who have been tested, and identify potentially modifiable factors associated with greater likelihood of testing across gender. METHODS Black(More)
Using a web-based survey of adolescents 14–16 years of age, a hierarchical index of heterosexual behavior was developed with excellent psychometric properties. The easiest sexual behavior to perform was “deep kissing” and the most difficult was “receiving anal sex” for females and “giving anal sex” for males. The index was validated with data that show(More)
This study used the Integrative Model as a framework to examine whether religiosity delays onset of coitus among a longitudinal sample of virgins, and investigated the causal pathways of this relationship. In addition, this study examined the behavioral beliefs about the consequences of engaging in sex, which distinguishes between youth who vary in level of(More)
This study identifies a theoretical mechanism through which communication with friends about sex influences sexual initiation in a sample of adolescents. The Integrative Model was used to assess the effect of attitudes, normative pressure and self efficacy on intentions to have sex in a sample of virgin adolescents. Results show that the constructs of the(More)