Abstract
The purpose of this research is to present the employment of a simple-to-use crossmodal method for measuring haptic size illusions. The method, that we call See what you feel, was tested by employing Uznadze’s classic haptic aftereffect in which two spheres physically identical (test spheres) appear different in size after that the hands holding them underwent an adaptation session with other two spheres (adapting spheres), one bigger and the other smaller than the two test spheres. To measure the entity of the illusion, a three-dimensional visual scale was created and participants were asked to find on it the spheres that corresponded in size to the spheres they were holding in their hands out of sight. The method, tested on 160 right-handed participants, is robust and easily understood by participants.
Highlights
IntroductionThe purpose of this research is to present the employment of a crossmodal matching method that we employed to quantify a rather strong haptic aftereffect
The purpose of this research is to present the employment of a crossmodal matching method that we employed to quantify a rather strong haptic aftereffect.An aftereffect is a phenomenon that can be described as changes in the perception of a present stimulus due to a prior event or activity, without conscious guidance or intentions
The first set of data, that we identified as preT, quantifies the difference between the visually evaluated size of the haptically perceived test sphere and its actual size for each of a participant’s hand
Summary
The purpose of this research is to present the employment of a crossmodal matching method that we employed to quantify a rather strong haptic aftereffect. An aftereffect is a phenomenon that can be described as changes in the perception of a present stimulus due to a prior event or activity, without conscious guidance or intentions. According to Uznadze, this phenomenon is rooted both in the participants’ previous experience and in their expectations. In Uznadze’s Theory of Set, human behavior is conceptualized as survival in an ever-changing environment. According to Uznadze, in order to effectively navigate through the environment, the human brain creates sets, which function as a collection of subconsciously preplanned expectations and behaviors for a specific situation, driven by contingent experience
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