This preliminary, exploratory study examines the impact of select social psychological phenomena on school-based ethical decision-making of school psychologists. Responses to vignettes and hypothetical statements reflecting several social psychological phenomena were collected from 106 practicing school psychologists. Participants were asked to respond by indicating the degree to which their actions in such a scenario would be influenced by the particular phenomenon being represented. Results indicate that some of these social psychological influences are present in the daily work of the school psychologist. (Contains 1 table.)