Attitude heritability, attitude change and physiological responsivity

This study explores the role of attitude heritability in connection with attitude change as a result of attitude discrepant behavior. Thirty four subjects were given high or low choice to write an essay which was discrepant from either a high heritability attitude or a low heritability attitude. High heritability attitudes were more resistant to change than low heritability attitudes. Attitude change was associated with greater electrodermal responding and faster heart rate for high heritability attitudes but not for low heritability attitudes.