1. the problem under investigation 2. the research method 3. the research findings 4. the discussion Abstract The current research examines the effect of self-regulation on the likelihood of committing infidelity. Thirty-two college students in exclusive romantic relationships interacted through a private chat room with an opposite-sex confederate. Prior to this interaction, a food- restriction task depleted half the participants of self-control. As predicted, depleted levels of self-regulation increased the likelihood of infidelity. Specifically, depleted participants were more likely to both accept a coffee date from and supply a personal telephone number to the confederate than nondepleted participants. Weakened self-control may be one potential cause for the levels of infidelity occurring in romantic partnerships today. Keywords: infidelity, interpersonal relationships, self-regulation