Averaged auditory evoked responses were obtained from 15 retarded and motor-handicapped subjects and from 15 nonretarded subjects in order to investigate comparative responsiveness and response features. (Author)

Habituation patterns of the galvanic skin response to auditory stimuli were studied in institutionalized retarded children and nonretarded subjects. (Author)

Equal CA educable mentally retarded and nonretarded adolescents stylus tracked an intermittently disappearing rotary pursuit target with no feedback, auditory feedback, and visual feedback. (Author)

Measures from a laboratory task and a free play observation suggested that attention is a key factor in understanding the high risk child's development and also that differences in attention between high and low risk children can be reliably obtained as early as three years of age. (Author)

Cortical evoked responses were recorded from 66 nonretarded and 66 Down's syndrome Ss in order to compare the inhibitory processes of the two groups. (Author/PHR)

In a study of 15 individuals (ages 15-21) with Down Syndrome, auditory brainstem response (ABR) detection levels were elevated, response amplitude reduced, and latency-intensity functions were significantly steeper than for a matched control group. Findings were associated with an impairment in hearing sensitivity at 8000 Hz for the experimental…

Eighteen moderately mentally retarded adults, 20 nonretarded elementary age children, and 20 nonretarded adults were exposed to three conditions of an auditory detection task (location, meaning, and a combination of both). Developmentally immature subjects (retarded adults and nonretarded children) demonstrated less efficient attentional capacity.…

Compared 24 educable mentally retarded (EMR) adolescents, 24 chronological age (CA) matched nonretarded adolescents, and 24 mental age (MA) matched children in same-different decision task in which dyadic sequences were presented within and across visual and auditory modalities. Results supported concept of greater visual dominance by retarded and…

Residual hearing capabilities of nine severely and profoundly retarded deaf-blind children (7-13 years old) were determined with an operant procedure that allowed the children to respond by making a selection between two responses, one which resulted in the presentation of auditory reinforcement or one which resulted in no reinforcement.…

Two groups of right-handed young adults with and without Down Syndrome (N=24) performed a rapid unimanual finger-tapping task under two conditions: alone and while sound-shadowing (repeating) single-syllable, high frequency words. Results provided no evidence for reverse (right hemisphere) lateralization of speech in individuals with Down…