A SERIES OF RESEARCH PROGRAMS CONCERNED WITH THE EFFECTS OF SYSTEMATIC VARIATIONS OF CERTAIN CONDITIONS RELATED TO LEARNING HAS BEEN CONDUCTED. PROJECTS PREVIOUSLY REPORTED INCLUDED TWO INVESTIGATIONS OF REINFORCEMENT AND SUBJECT VARIABLES AND ONE ON THE STUDY OF PRACTICE AND SUBJECT VARIABLES. THE NATURE OF THE OVERALL PROGRAM WAS DISCUSSED IN…

The discriminative learning and transfer of compound and component problems were assessed in retarded subjects at two levels of intelligence. (Author/SB)

The interrelations between mental age (MA), IQ, and mediation were studied in 72 retardates in special classes. Subjects were selected to fall into sexually balanced groups of six in 12 MA-IQ categories (IQ 50-59, 60-69, 70-79, and 80-89; MA 4-0 to 5-11, 6-0 to 7-11, and 8-0 to 9-11). The apparatus alternately displayed two pairs of stimuli, and…

Studies of recall and recognition short-term memory (STM) were reviewed, and a series of studies of serial recognition memory of normal and retarded children was described. In experiments using a recall procedure there were decrements in initial performance level with decreasing age and IQ but less evidence that forgetting occurred at a faster…

Rote learning and retention performance was studied as a function of method used in original learning and as a function of intellectual level. Sixty educable mentally retarded and 60 mentally normal junior high school students were randomly selected and assigned to one of three treatment groups, each learning to a different criterion, for each…

Two introductory passages, one regular passage, and one experimental advance organizer passage developed to facilitate initial learning were assigned to normal and retarded children. The subjects were 184 normal 8-year-olds (controls' mean IQ 118.00, organizers' 118.80) and 184 educable mentally retarded 15-year-olds (EMR controls' mean IQ 74.85,…