Three preschoolers performed four sorts with stimulus cards--an untaught target sort and three directly taught alternating sorts considered to self-instruct the target performance. Accuracy increased first in the skill sorts and then in the untaught target sorts. All subjects generalized to new target sorts. Correct spontaneous self-instructions…

The proposition was investigated that concept learning is a twofold process: acquisition of a prototype and development of generalization and discrimination skills. The assumption that formative evaluation procedures are necessary when attempting to prepare better instructional treatments for improved student performance was tested. (Author/GK)