Psychology Publications

Title

The Material-weight Illusion Induced by Expectations Alone

Document Type

Article

Publication Date

1-2011

Journal

Attention, Perception, & Psychophysics

Volume

73

Issue

1

First Page

36

Last Page

41

URL with Digital Object Identifier

http://dx.doi.org/10.3758/s13414-010-0007-4

Abstract

In the material-weight illusion (MWI), equally weighted objects that appear to be made from different materials are incorrectly perceived as having different weights when they are lifted one after the other. Here, we show that continuous visual experience of the lift is not a prerequisite for this compelling misperception of weight; merely priming the lifters' expectations of heaviness is sufficient for them to experience a robust MWI. Furthermore, these expectations continued to influence the load force used to lift MWI-inducing stimuli trial after trial, supporting the notion that vision plays an important role in the skillful lifting of objects.