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Over the past 18 years, Zelaznik and colleagues have promoted what is known as the event-emergent timing distinction. According to this framework, control of timing can be based upon a neurological clock-like process or upon an emergent process. I review the highlights of this research program that supports this distinction, then describe a new line of research that examines whether timing is a goal of the task or a consequence of other movement constraints. These results highlight the importance of goals in the control of timing.
Zelaznik is with the Department of Health and Kinesiology, Purdue University, West Lafayette, IN.