Three experiments identified factors that did and did not enhance the formation of two-node four-member equivalence classes when training and testing were conducted with trials presented in a trace stimulus pairing two-response (SP2R) format. All trials contained two separately presented stimuli. Half of the trials, called within-class trials,…

Imitative responding was first established and then reinforced only in the presence of one stimulus and not in the presence of another. Subjects were three institutionalized, severely subnormal boys. (Author)

Generalization of stimulus control in different situations and with novel adults occurred with those children who were trained by contingent reinforcement, but not with those trained by both contingent and noncontingent reinforcement. This research was submitted as part of the author's dissertation. (MH)

TWO EXPERIMENTS WERE CONDUCTED IN ORDER TO OBTAIN A MATHEMATICAL DESCRIPTION OF THE PERCEPTUAL PROCESS BY WHICH NORMAL AND MENTALLY RETARDED SUBJECTS SYNTHESIZE STIMULUS CUES IN PERCEPTUAL IDENTIFICATION. THE INITIAL STUDY EMPLOYED 50 COLLEGE STUDENTS, 34 GRADE SCHOOL STUDENTS, AND 24 MENTALLY RETARDED CHILDREN (AGES 9-16) AS SUBJECTS. THE…

In this study, a transfer of stimulus control procedure was used to establish generalized verb-noun instruction-following skills in two severely retarded boys. (Author/JH)

The response of mentally retarded children to various stimuli (low active remain low active, high active remain high active) relates activity to intelligence and suggests that, for low intellectual functioning subjects, the retardation was due to endogenous reasons with consequent organic brain involvement affecting mechanisms controlling activity…

This study explored whether an identity-matching-based stimulus equivalence procedure could be used to teach vowel and consonant stimulus classes to two adolescent females with moderate mental retardation. Both participants acquired five-member classes of vowel and consonant stimuli, which subsequently generalized to vocal classification and to…

Two groups of retarded adolescents were presented sets of multiple verbal directions (imperative sentences). One group was exposed to pictures illustrating the objects and action of each direction in addition to the verbal directions. Subjects were required to carry out performances demanded by the directions. The direction-following behavior of…

Study conducted to investigate attention span in relation to various schedules or regimes of reinforcement. (Author/MB)

Among the findings were that the treatment procedure produced immediate and substantial suppression effects on the self-injurious behavior, which generalized to the nontraining environment and endured over an eight-month interval. (Author/DLS)

Three mentally retarded adult residents of a group home were trained to read survival words in four conditions (in the group home with one trainer; in the group home with two to three trainers; one trainer in the group home and the natural environment; and two to three trainers in the group home and the natural environment). Training was…