Unintentional injury due to risk-taking is a leading cause of death in the U.S. and places large burdens on society. We know that risk-taking is influenced by hormone response to stress. Variations of oxytocin receptor gene OXTR rs53576 influence stress sensitivity, and are influenced by social contexts. We hypothesize that GG-allele carriers will take less risks than A-allele carriers, but that this will be reversed when stressed. Results are expected to be influenced by sex and demographics.