The Effect of Proximity of Auditory Stimuli on the Activity Levels of Profoundly Mentally Retarded Persons
Abstract: The purpose of the study was to determine the effect of music received through headphones versus that received free field on the activity level of profoundly retarded subjects. Subjects were 5 nonambulatory, profoundly retarded persons, aged 9-19 years. Activity level was observed in the following categories: relaxed/asleep, no movement, movement, movement of extremities, smile, and vocalization. All subjects were observed for a total of 15 sessions with each serving as his own control in an ABAC design. Results of data analysis showed no major differences in activity levels whether listening to music through headphones or free field.
Keyword(s): auditory-stimuli, mental-retardation, developmental-disabilities, activity-level, severe-mental-retardation.