Assessed the effectiveness of the prejudice-reduction simulation (PRS) "Blue Eyes-Brown Eyes" as a tool for changing the attitudes of 164 teacher education students toward Blacks. Ss in experimental and control groups completed 2 racial attitude instruments at 2 wks and 9 wks into an education course. Five weeks into the course, experimental Ss participated in the 3-hr PRS. Most Ss reported that the experience was meaningful for them. The PRS favorably influenced non-Black Ss' attitudes toward Blacks, while lectures and viewing the PRS on film did not appear to influence controls' attitudes. Statistical evidence supporting the effectiveness of the activity for prejudice reduction was moderate. Ss and the PRS facilitator reported stress from the PRS.