Abstract
19 6-yr.-old boys participated in a two-part experiment on horizontal inter-rung distance. The first part was limited to self-prediction, and in the second part the boys were asked to use a hanging-swing movement between pairs of variable distance horizontal rungs. The variable distances ranged from 24 to 59 in. A sideview of each boy's movement performance was recorded on 16-mm motion film for later analysis using a stop-action projector. The results indicated rung distance did not affect the accuracy of self-prediction, but it did influence success of the task and frequency of jumping. The percentage of successful trials decreased as inter-rung distance was increased. Jumping movements became more frequent as inter-rung distance increased.
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