Abstract
The developmental course of rhythmic motor behavior was followed longitudinally for three groups of preambulatory children — normally developing, Down syndrome, and those with profound motor impairment. The groups differed in chronological age but were comparable with respect to motor age. The motor impaired subjects displayed significantly less rhythmic motor behavior than the nondisabled and Down syndrome groups. In comparing particular subtypes of rhythmic motor behavior, differences were found in both the average number of bouts and duration of subtypes among the groups. Longitudinal analyses of the data over the entire observation period revealed that the rhythmic motor behavior of the children with Down syndrome was more similar to that exhibited by the nondisabled children than was the rhythmic motor behavior of the children with motor impairment. However, there was considerable variability among the groups in several particular subtypes.
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This research was supported by grants from the National Institute of Child Health and Human Development (HD 17650 and HD 07226).
The authors acknowledge the assistance of Robert E. Arendt, Grant Youngquist, Michael Hohn, and Charles Lowitzer in obtaining the observational data and thank the families of the subjects for their enthusiasm and dedication to the project.
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MacLean, W.E., Ellis, D.N., Galbreath, H.N. et al. Rhythmic motor behavior of preambulatory motor impaired, down syndrome and nondisabled children: A comparative analysis. J Abnorm Child Psychol 19, 319–330 (1991). https://doi.org/10.1007/BF00911234
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DOI: https://doi.org/10.1007/BF00911234