Twenty mentally retarded children (mean age 10 years) and 40 nonretarded children (grades 2 and 5) learned pairs of pictures in a single-function order (terms of each pair were in the same position throughout) or in a double-function order (all items were re-paired). (Author)

Seven mentally retarded adolescents received either verbal or nonverbal training on a shape-sorting task within a multiple baseline design. Both training sequences resulted in the successful acquisition of the target performance, but only the verbal training sequence facilitated generalization of performance to a novel shape and to a new…

The effectiveness of D. Ausubel's Advance Organizer, an introduction presented before the material to be taught, was tested with 96 mildly retarded adolescents. Results of a three-way analysis of variance indicated a facilitative effect under the written presentation, especially for high-level questions and a negative effect under the oral…

The effect of descriptive verbalization during observation of a model on mentally retarded boys' retention for what they had observed was examined with 40 9- to 12-year-old boys in public school educable mentally retarded classes. (Author)