Abstract
Sociologists have long been puzzled by whether attitudes inform behaviors or vice versa. Accurately assessing both possibilities requires panel data collected at relatively short intervals. In this study, I leverage intensive panel data from the Relationship Dynamics and Social Life Study to assess the case of young women's premarital sexual attitudes and behavior. Through a series of descriptive analyses and cross-lagged panel models, I show that opposition to premarital sex in young adulthood is only sometimes associated with subsequent sexual behavior and that premarital sex is negatively associated with later opposition to premarital sex. Young women are especially likely to reduce their opposition following first sex relative to sex reported at any time. Thus, initial behavioral experiences may result in outsized shocks to attitudes, following an active updating model. That subsequent sex is associated with less attitudinal change suggests that young women initially update their attitudes before settling into them. This study nuances long-standing debates on the malleability of attitudes within a person over time and with respect to behavior and has implications for how people approach behavior according to their attitudes across a wide spectrum of social phenomena.