title: More information on the nature of stereotyped body-rocking.
abstract: Body-rocking was exposed to kinematic analysis in two studies. In the first study, amplitude was larger in the natural body-rocking of individuals with mental retardation than in the natural body-rocking of college students. Variability did not differ. In the second study, natural body-rocking of people with mental retardation was compared with their artificial body-rocking. Amplitude and variability were larger in the artificial condition. However, this result was not clear. We suggest that group and condition differences might have been a function of practice.
authors.affiliation: Department of Psychology, University of Illinois at Chicago, 60607, USA.
authors.forename: G
authors.initials: G
authors.lastname: Berkson
authors.forename: T
authors.initials: T
authors.lastname: Andriacchi
authors.forename: L
authors.initials: L
authors.lastname: Sherman
mesh_terms: D006801:Humans; D008607:Intellectual Disability / Q000523:psychology*; D011582:Psychological Theory; D019956:Stereotypic Movement Disorder / Q000175:diagnosis* / Q000523:psychology*; D014743:Videotape Recording