A developmental and analytic study of the size-weight illusion
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TL;DR
It was suggested that developmental trends in magnitude of the illusion under the three conditions reflected differences in intermodal and intramodal integration.
Abstract
The size-weight illusion was measured under three conditions in Ss ranging in age from 4 to 16 years, and adults. Presentation conditions included one in which size of the objects was registered both visually and haptically, a second in which Ss were blindfolded and size was registered only haptically, and a third in which Ss held the objects by strings and size was registered only visually. In the visual condition, the magnitude of the illusion was low and decreased with age; in the haptic condition the magnitude increased with age; in the visual-haptic condition it remained stable. It was suggested that developmental trends in magnitude of the illusion under the three conditions reflected differences in intermodal and intramodal integration.