Results from a questionnaire administered to 1,353 college students, who were to receive a tuition rebate for tutoring disadvantaged elementary school children, indicated that external rewards were not equally salient for all tutors. Tutors could be classified into 4 motivational groups on the basis of their primary reasons for tutoring. Extrinsically motivated tutors reported less change in their tutees, and were more critical of the tutoring experience than tutors professing differing degrees of intrinsic motivation. When tutors claimed both extrinsic and intrinsic motives, their other assessments were, unexpectedly, similar to those of internally motivated tutors.