Differential effects of minified and magnified mirror visual feedback on the underlying misperception of hand size

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Perera, A.T.-M. ORCID: 0000-0002-3812-5023, Tan, J.T., Mu, P.S. and Newport, R., 2021. Differential effects of minified and magnified mirror visual feedback on the underlying misperception of hand size. Attention, Perception, and Psychophysics. ISSN 1943-3921

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Official URL: https://doi.org/10.3758/s13414-021-02262-9

Abstract

Perception of the size of body parts, for instance the hand, has been shown to be distorted in healthy participants, with over- and under-estimations of width and length respectively. Illusory manipulations of body shape and size have highlighted the flexibility of the body representation and have also been found to update immediate perceptions of body size and surrounding objects. Here, we examined whether underlying misperceptions of hand width and length can be modified through exposure to illusory changes in hand size using a mirror visual feedback (MVF) paradigm. While questionnaire responses indicated subjective susceptibility to both magnified and minified manipulations, objective hand size estimates only showed significant differences following exposure to minifying mirrors. These variations might reflect differences in the way that stored representations are accessed or updated in response to size manipulations. Secondly the findings further reinforce differences between subjective and objective outcomes of illusions on subsequent body perception.

Item Type:

Journal article

Alternative Title:

Hand size under-estimations following minified MVF [running head]

Publication Title:

Attention, Perception, and Psychophysics

Creators:

Perera, A.T.-M., Tan, J.T., Mu, P.S. and Newport, R.

Publisher:

Springer (part of Springer Nature)

Date:

22 March 2021