The hypothesis that groups high and low on environmental responsibility have different personality profiles was tested using responses of 319 introductory psychology students (132 men and 187 women) who completed the ECOSCALE and the Revised NEO Personality Inventory for partial course credit. Results of discriminant function analysis supported the hypothesis, indicating that groups scoring high and low on Environmental Responsibility had significantly different personality profiles and that the standard discriminant function coefficients were quite substantial (≥ .50) for Openness (.72) and Agreeableness (.50).