Laterality effects in the haptic horizontal-vertical illusion

Heller, Morton A.; Joyner, Tamala D.; Dan-Fodio, Hariyah

doi:10.3758/bf03334956

Cited by 15 publications

(10 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the methods used are not all that different from those used in other research for the study of illusions (Amazeen & DaSilva, 2005) and have advantages over the use of a fingers posture for size estimates (e.g., Heller et al, 1997;Heller, Joyner, & Dan-Fodio, 1993;Smeets, Brenner, de Grave, & Cuijpers, 2002). The rulers were in different spatial locations than the extents being judged, and conceivably, this could prompt systematic errors.…”

Section: Resultsmentioning

confidence: 99%

Attenuating the haptic horizontal—vertical curvature illusion

Heller

Walk

Schnarr

et al. 2010

Attention, Perception, & Psychophysics

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Attenuating the haptic horizontal—vertical curvature illusion

Heller

Walk

Schnarr

et al. 2010

Attention, Perception, & Psychophysics

Self Cite

View full text Add to dashboard Cite

“…The horizontal^vertical illusion may be stronger with the use of the right hand (Heller et al 1993), since the right brain may be more accurate in the processing of spatial information. Tsai reported a stronger illusion with the use of the right hand, but also found that the Mu« ller-Lyer illusion was present when subjects felt stimuli with their left hands (Tsai 1967 …”

Section: Resultsmentioning

confidence: 99%

The Haptic Müller-Lyer Illusion in Sighted and Blind People

et al. 2002

View full text Add to dashboard Cite

We examined the effect of visual experience on the haptic Müller-Lyer illusion. Subjects made size estimates of raised lines by using a sliding haptic ruler. Independent groups of blindfolded-sighted, late-blind, congenitally blind, and low-vision subjects judged the sizes of wings-in and wings-out stimuli, plain lines, and lines with short vertical ends. An illusion was found, since the wings-in stimuli were judged as shorter than the wings-out patterns and all of the other stimuli. Subjects generally underestimated the lengths of lines. In a second experiment we found a nonsignificant difference between length judgments of raised lines as opposed to smooth wooden dowels. The strength of the haptic illusion depends upon the angles of the wings, with a much stronger illusion for more acute angles. The effect of visual status was nonsignificant, suggesting that spatial distortion in the haptic Müller-Lyer illusion does not depend upon visual imagery or visual experience.

show abstract

“…Study of the illusion is further complicated by the finding that illusory effects were influenced by the hand used to feel the raised-line patterns (Heller, Joyner, & Dan-Fodio, 1993). The illusion was found only for inverted-T figures, and no illusion was found for the left thumb.…”

mentioning

confidence: 99%

The tactual horizontal-vertical illusion depends on radial motion of the entire arm

Heller

Calcaterra

Burson

et al. 1997

Perception & Psychophysics

Self Cite

View full text Add to dashboard Cite

Wesought to clarify the causes of the tactual horizontal-vertical illusion, where vertical lines are overestimated as compared with horizontals in L and inverted-T figures. Experiment 1 did not use L or inverted-T figures, but examined continuous or bisected horizontal and vertical lines. It was expected that bisected lines would be perceived as shorter than continuous lines, as in the inverted-T figure in the horizontal-vertical illusion. Experiment 1 showed that the illusion could not be explained solely by bisection, since illusory effects were similar for continuous and bisected vertical and horizontal lines. Experiments 2 and 3 showed that the illusory effects were dependent upon stimulus size and scanning strategy. Overestimation of the vertical was minimal or absent for the smallest patterns, where it was proposed that stimuli were explored by finger movement, with flexion at the wrist. Larger stimuli induce whole-arm motions, and illusory effects were found in conditions requiring radial arm motion. The illusion was weakened or eliminated in Experiment 4 when subjects were forced to examine stimuli with finger-and-hand motion alone, that is, their elbows were kept down on the table surface, and they were prevented from making radial arm motions. Whole-arm motion damaged performance and induced perceptual error. The experiments support the hypothesis that overestimation of the vertical in the tactual horizontal-vertical illusion derives from radial scanning by the entire arm.

show abstract

Laterality effects in the haptic horizontal-vertical illusion

Cited by 15 publications

References 20 publications

Attenuating the haptic horizontal—vertical curvature illusion

Attenuating the haptic horizontal—vertical curvature illusion

The Haptic Müller-Lyer Illusion in Sighted and Blind People

The tactual horizontal-vertical illusion depends on radial motion of the entire arm

Contact Info

Product

Resources

About