A 21-item measure of pre-school children's "self-concept as a learner," known as the Behavioral Descriptor Scale, was developed and evaluated. The child's teacher and an assistant were required to complete the scale for the child at two different times. Satisfactory levels of reliability were gained for each scale item. Test-retest reliability based on a sample of 223 children and 43 teachers was 0.82, while concurrent validity between the child's teacher and the pre-school assistant (or occasionally a co-teacher) was 0.72. Significant sex differences were found, with girls being more positively evaluated. Correlations between the scale and intelligence and social class, based on a sub-sample of 46, were not significant. Factor analysis revealed the existence of four factors which together accounted for 54.9% of the total variance. In an attempt intended primarily to assess the validity of the behavioral descriptor scale, two other scales were developed and administered. A behavior checklist failed to provide any useful information, but a projective scale administered to a small sub-sample showed some promise. (Author/SS)