We continually move our body and our eyes when exploring the world, causing our sensory surfaces, the skin and the retina, to move relative to external objects. In order to estimate object motion consistently, an ideal observer would transform estimates of motion acquired from the sensory surface into fixed, world-centered estimates, by taking the motion of the sensor into account. This ability is referred to as spatial constancy. Human vision does not follow this rule strictly and is therefore subject to perceptual illusions during eye movements, where immobile objects can appear to move. Here, we investigated whether one of these, the Filehne illusion, had a counterpart in touch. To this end, observers estimated the movement of a surface from tactile slip, with a moving or with a stationary finger. We found the perceived movement of the surface to be biased if the surface was sensed while moving. This effect exemplifies a failure of spatial constancy that is similar to the Filehne illusion in vision. We quantified this illusion by using a Bayesian model with a prior for stationarity, applied previously in vision. The analogy between vision and touch points to a modality-independent solution to the spatial constancy problem.

Moscatelli, A., Hayward, V., Wexler, M., & Ernst, M.o. (2015). Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion. SCIENTIFIC REPORTS, 5(1), 14584 [10.1038/srep14584].

Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion

Moscatelli A.
;
2015

Abstract

We continually move our body and our eyes when exploring the world, causing our sensory surfaces, the skin and the retina, to move relative to external objects. In order to estimate object motion consistently, an ideal observer would transform estimates of motion acquired from the sensory surface into fixed, world-centered estimates, by taking the motion of the sensor into account. This ability is referred to as spatial constancy. Human vision does not follow this rule strictly and is therefore subject to perceptual illusions during eye movements, where immobile objects can appear to move. Here, we investigated whether one of these, the Filehne illusion, had a counterpart in touch. To this end, observers estimated the movement of a surface from tactile slip, with a moving or with a stationary finger. We found the perceived movement of the surface to be biased if the surface was sensed while moving. This effect exemplifies a failure of spatial constancy that is similar to the Filehne illusion in vision. We quantified this illusion by using a Bayesian model with a prior for stationarity, applied previously in vision. The analogy between vision and touch points to a modality-independent solution to the spatial constancy problem.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/09
English
Con Impact Factor ISI
Adult; Algorithms; Female; Humans; Male; Psychometrics; Young Adult; Bayes Theorem; Illusions; Models, Psychological; Motion Perception; Touch Perception
Moscatelli, A., Hayward, V., Wexler, M., & Ernst, M.o. (2015). Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion. SCIENTIFIC REPORTS, 5(1), 14584 [10.1038/srep14584].
Moscatelli, A; Hayward, V; Wexler, M; Ernst, Mo
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/193154
Citazioni
  • ???jsp.display-item.citation.pmc??? 5
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 14
social impact