Seventy preschoolers, first, and third graders (average ages of 4 1/2, 6 1/2 and 8 1/2 years, respectively) participated in interviews which used stories and pictures to assess their perceptions of the sources of self-knowledge (self-observation, social feedback, and social comparison). Assessments were made of level of role-taking and salience, comprehension, and ranking of importance of each source. Results indicated that role-taking level, salience (recall), and comprehension of each source increased with age. At all grade levels social feedback was the first source of self-knowledge recalled. No grade differences occurred for rankings of each source; children cited self-observation as most important most frequently, followed by feedback from others and social comparison. (Author/MP)