The speed of performing a simple ballistic movement under two conditions of response-initiation, stimulus-cued and self-cued, was studied with 24 educable retardates. Also, the effects of stimulus intensity (50 and 70 db re threshold) and sex were examined using a 2 × 2 × 2 factorial design. All main effects, but no interactions, were significant. The slower ballistic speed observed under the self-cued condition was attributed to a deficient capacity for self-arousal.
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References
1.
BerksonG.An analysis of reaction time in normal and mentally deficient young men: 1. Duration threshold experiment. Journal of Menial Deficiency Research, 1960, 4, 51–58. (a).
2.
BerksonG.An analysis of reaction time in normal and mentally deficient young men: II. Variation of complexity in reaction rime tasks. Journal of Mental Deficiency Research, 1960, 4, 59–67. (b).
3.
BerksonG.An analysis of reaction time in normal and mearally deficient young men: III. Variations of stimulus and of response complexity. Journal of Mental Deficiency Research, 1960, 4, 69–77. (c).
4.
ClausenJ.Ability structure subgroups in mental retardation. Washington, D. C.: Sparton Press, 1966.
5.
KingH. E.Reaction time and speed of voluntary movement by normal and psychotic subjects. Journal of Psychology, 1965, 59, 219–227.
