Abstract
Warren, Young, and Lee (1986) found that treadmill runners control step length by regulating vertical impulse, which could be modulated by the optical time-to-contact variable tau. In contrast, Patla, Robinson, Samways, and Armstrong (1989) report a 40% contribution of horizontal impulse in overground running and a control strategy that depends on the timing of target cuing, undermining the tau-impulse theory. This discrepancy is due to differences in methodology, analysis, and interpretation. However, the data indicate that runners regulate a global impulse parameter that primarily affects vertical impulse, salvaging the tau-impulse theory
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More From: Journal of Experimental Psychology: Human Perception and Performance
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