ULTRADIAN RHYTHMS IN STEREOTYPED AND SELF-INJURIOUS-BEHAVIOR
- 1 January 1981
- journal article
- research article
- Vol. 85 (6), 601-610
Abstract
Institutionalized profoundly mentally retarded persons who exhibited stereotyped motor movements, including self-injurious behavior, were observed continuously in their typical environments for periods of 8-14 h on each of several days. In addition to targeting stereotyped responses, data pertaining to activities, settings, other behavioral states and social interactions were collected. Spectral and cross-spectral analyses were conducted on data from each daily session. Power spectra indicated a marked ultradian or less than 24 h rhythm for each subject on each day. Spectral density estimates were thought to reflect the influence of rhythmic changes in the institutional environment and, to a lesser degree, the influence of an endogenous rest-activity rhythm.This publication has 8 references indexed in Scilit:
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