Examining the size-weight illusion with visuo-haptic conflict in immersive virtual reality

The Quarterly Journal of Experimental Psychology : QJEP
Gavin Buckingham

Abstract

When we experience our environment, we do so by combining sensory inputs with expectations derived from our prior knowledge, which can lead to surprising perceptual effects such as small objects feeling heavier than equally weighted large objects (the size-weight illusion (SWI)). Interestingly, there is evidence that the way in which the volume of an object is experienced can affect the strength of the illusion, with a SWI induced by exclusively haptic volume cues feeling stronger than a SWI induced with only visual volume cues. Furthermore, visual cues appear to add nothing over and above haptic size cues in terms of the strength of the induced weight illusion-findings which are difficult to reconcile with work using cue-conflict paradigms where visual cues usually dominate haptic cues. Here, virtual reality was used to place these senses in conflict with one another. Participants (N = 22) judged the heaviness of identically weighted cylinders across three conditions: (1) objects appeared different sizes but were physically the same size, (2) objects were physically different sizes but appeared to be the same size, or (3) objects which looked and felt different sizes from one another. Consistent with prior work, haptic size cu...Continue Reading

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Citations

Nov 2, 2019·Scientific Reports·Vonne van Polanen, Marco Davare
Mar 15, 2020·Scientific Reports·Desiree E HollerJacqueline C Snow
Dec 5, 2021·Attention, Perception & Psychophysics·Caitlin Elisabeth NaylorGavin Buckingham

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