Spontaneous movement responses of Negro and white lower-class and white middle-class 4-yr.-olds were recorded on video tape under several controlled conditions. Tapes were coded for total movement and for gross movement response. Negro children emitted a significantly greater number of movement responses and a greater variety of movement response than did both white groups.
References
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BayleyN.Comparisons of mental and motor test scores for ages 1–15 months by sex, birth order, tack, geographical location, and education of parents. Child Development, 1965. 30, 379–411.
