Body-part size estimates of males and females were obtained under conditions of normal room illumination and darkness. In addition, estimates of two body parts were obtained when each part was being actively moved and when it was immobile. The effect of active movement was to reduce underestimation of these sites. The movement-nonmovement condition also interacted with other variables. Other results regarding relative differences among estimates of various body parts and the effects of room illumination and S's sex tended to confirm previous findings.
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