Do curved reaching movements emerge from competing perceptions? A reply to van der Wel et al. (2009)

Journal of Experimental Psychology. Human Perception and Performance
Michael J SpiveyMarc Grosjean

Abstract

Spivey, Grosjean, and Knoblich (2005) reported smoothly curved reaching movements, via computer-mouse tracking, which suggested a continuously evolving flow of distributed lexical activation patterns into motor movement during a phonological competitor task. For example, when instructed to click the "candy," participants' mouse-cursor trajectories curved conspicuously toward a picture of a candle before landing on the picture of the candy. In their commentary on this work, van der Wel, Eder, Mitchel, Walsh, and Rosenbaum (2009) describe a quantitative simulation of reaching movements that stands as an existence proof that a discrete-processing speech perception system can feed into a continuous-processing motor movement system to produce reach trajectories similar to that observed by Spivey et al. In this reply, we describe eye-tracking evidence, new mouse-tracking evidence, and a dynamic version of van der Wel et al's simulation, all of which suggest that competing perceptual representations may instigate the preparation of multiple movement plans that are merged in a dynamically weighted average, thus producing a single smoothly curved movement. Like van der Wel et al., we are optimistic that an emphasis on the computational ...Continue Reading

Citations

Apr 24, 2013·Cognitive Science·Daniel YurovskyLinda B Smith
Oct 22, 2010·Acta Psychologica·Sarah E AndersonMichael J Spivey
Nov 13, 2013·Cognition·Robrecht P R D van der WelGuenther Knoblich
Apr 8, 2015·PLoS Computational Biology·Nathan F Lepora, Giovanni Pezzulo
Dec 25, 2017·Cognitive Processing·Edward A Cranford, Jarrod Moss
Feb 14, 2019·Behavior Research Methods·Mora MaldonadoEmmanuel Chemla
Dec 26, 2018·Current Directions in Psychological Science·Jonathan B Freeman
Jan 11, 2020·Frontiers in Psychology·Antonio CalcagnìFrancesca Freuli

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