The disappearing limb trick and the role of sensory suggestibility in illusion experience

Neuropsychologia
Kayla D StoneH Chris Dijkerman

Abstract

Body ownership (the feeling that my body belongs to me) can be easily perturbed in healthy individuals by inducing bodily illusions. For example, dis-integrating vision, touch, and proprioception can produce the feeling that your limb is 'lost', such as in "the disappearing hand trick" (DHT). Following this illusion, participants report that the hand feels as though it is no longer part of the body, that it does not belong to them anymore, and that they do not know its location. However, it remains unknown whether this illusion can also be applied to the feet. Lower body ownership is disturbed in some populations, such as in Body Integrity Identity Disorder (BIID), where people have a longstanding desire to paralyze or amputate a (disowned) part of their body (i.e. usually the legs), thus exploring the efficacy and utility of lower body illusions might be useful for populations like such. In the current study, we induced the disappearing hand and foot trick in two groups of healthy adults. As the illusion crucially relies on illusory sensory feedback, we also explored if one's level of sensory suggestibility influenced the experience of the illusion. Questionnaire data showed that the DHT can be applied to the feet, as there wa...Continue Reading

Citations

Mar 22, 2020·Psychological Research·Kayla D StoneAnouk Keizer
Feb 20, 2019·Frontiers in Psychology·Silvia GuerraValentina Parma
Feb 2, 2021·Frontiers in Psychology·Gianluca SaettaPeter Brugger
May 11, 2020·Current Biology : CB·Gianluca SaettaPeter Brugger
Sep 9, 2019··Katrin WolfCeline Tran

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