Contribution of perceptual and sensorimotor information to prospective action judgments

The present research aims to study the processes underlying judgements about one’s ability to perform an action, which is considered as a fundamental aspect of adaptive behaviour. In a series of experiments, we asked participants to make prospective grasping judgements and we manipulated perceived object size using the Ebbinghaus illusion (a central circle surrounded by small/large circles) and hand posture using concurrent motor tasks. We showed that (1) largeness vs. smallness illusion and squeezing vs. spreading fingers led participants to underestimate their ability to grasp the central circle (2) the motor task influenced grasping judgements only when the exact same effectors were involved and (3) hand posture did not influence grasping judgements when no illusion distorted perceived size, suggesting that integration of sensorimotor information is weighted on the uncertainty introduced by the illusion. We concluded that action judgements rely on the interaction of perceptual, cognitive and motor processes.

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Geers, L., Pesenti, M., Vannuscorps, G., & Andres, M. (2019). Contribution of perceptual and sensorimotor information to prospective action judgments. 21st conference of the European Society for Cognitive Psychology, Tenerife, Spain. https://hdl.handle.net/2078.5/170382