Results of three studies involving Down syndrome students suggested that the auditory-visual recall difference evidenced by nonretarded but not by retarded Ss may have been due to the differential use of information in echoic memory. (Author)

When stimuli differed on two dimensions (size and shape), either of which furnished enough information for a correct response, eight educable retarded adults were faster to discriminate than when stimuli differed only on dimension. (Author)

A study examining the visual-auditory integration ability of 16 mildly mentally retarded adolescents revealed that Ss did significantly better on intrasensory than intersensory tasks and were more effective on tasks requiring judgments of intrasensory equivalence than those requiring judgments of intersensory equivalence. (Author/CL)

Thirty-five institutionalized, mentally retarded individuals (17 to 47 years old) navigated an obstacle course while viewing through an optical prism that displaced the visual field (visual-motor rearrangement). The degree of adaptation to visual-motor rearrangement was assessed and compared with scores on a research version of the Adaptive…

Two-letter stimulus displays, differing in the magnitude of the horizontal spatial separation between the letters, were presented tachistoscopically to 10 retarded and 1 nonretarded adults. (Author/CL)

Four severely retarded and four nonretarded adolescents learned compound discriminations in the haptic (touch) modality using D. Ray's conflict-compound procedure. Subjects evinced selective attention effects in posttraining tests conducted in the haptic modality. Visual transfer tests revealed the effects of conflict-compound discrimination…

Sixteen mildly mentally retarded adults were compared on both an auditory and a visual vigilance task with 16 Ss having greater than average intelligence. (Author)

Only 11 of 22 mildly retarded young adults successfully passed a criterion pretest involving discriminating pairs of upright same-different cones. The 11 Ss performed poorly on a second task involving a more complex transformation. Ss who failed the criterion task produced primarily egocentric responses. (Author)

Performance differences between 10 nonretarded children and 10 moderately/severely retarded adolescents on a manual control task were examined. Results suggested that the ability to discriminate internal cues is related to IQ differences. (Author)

A delayed matching-to-sample task, with pictures as sample and comparison stimuli, was given to four severely retarded persons 17- to 22-years-old. (CL)

Examined was the extent of increase in learning efficiency of 72 mentally retarded children, mean age 14 years, when the stronger of two perceptual modalities (auditory or visual) was matched to a unisensory auditory or visual perceptual curriculum. (Author/MC)

Nineteen moderately/severely retarded students (ages 9-22) completed ten 15-minute computer-assisted instruction sessions and seven basic cognitive tasks measuring simple learning, choice reaction time, relearning, probed recall, stimulus discrimination, tachictoscopic threshold, and recognition memory. Stimulus discrimination, probed recall, and…