Der Einfluss geometrisch-optischer Täuschungen auf sakkadische Augenbewegungen

Tegetmeyer, Helmut; Wenger, Anja

doi:10.1055/s-2005-858870

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…If the availability of online visual feedback is critical, one would predict substantial illusion effects on saccades. Finally, studies on illusion effects on saccades show a large variability in results, ranging from 20–30% (Bernardis et al 2005 ; De Grave et al 2006b ; Knox 2006 ; Lavrysen et al 2006 ; McCarley et al 2003 ) to effects between 10 and 20% (De Grave et al 2006b ; Ehresman et al 2008 ; Festinger et al 1968 ; Lavrysen et al 2006 ; Thompson and Westwood 2007 ) or even less than 10% (Binsted and Elliott 1999 ; McCarley et al 2003 ; Tegetmeyer and Wenger 2004 , 2006 ). Finally, Wong and Mack ( 1981 ) reported that saccadic eye movements were not affected by an illusion of displacement.…”

Section: Introductionmentioning

confidence: 99%

“…Assuming that position and vector coding are performed by separate mechanisms (De Grave et al 2004 ) one might expect differences in illusion effects. Indeed, studies in which the spatial location of the stimulus was predictable (Binsted and Elliott 1999 ; Ehresman et al 2008 ; Lavrysen et al 2006 ; Tegetmeyer and Wenger 2004 , 2006 ; Thompson and Westwood 2007 ) showed smaller illusion effects than studies in which the stimulus was presented randomly in one of several directions (Bernardis et al 2005 ; De Grave et al 2006a , b ; Knox 2006 ; McCarley et al 2003 ). To systematically investigate the effect of spatial predictability of the stimulus, we asked participants to perform three blocks of trials.…”

Section: Introductionmentioning

confidence: 99%

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The effect of the Müller-Lyer illusion on saccades is modulated by spatial predictability and saccadic latency

Grave

Bruno

2010

Exp Brain Res

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Studies investigating the effect of visual illusions on saccadic eye movements have provided a wide variety of results. In this study, we test three factors that might explain this variability: the spatial predictability of the stimulus, the duration of the stimulus and the latency of the saccades. Participants made a saccade from one end of a Müller-Lyer figure to the other end. By changing the spatial predictability of the stimulus, we find that the illusion has a clear effect on saccades (16%) when the stimulus is at a highly predictable location. Even stronger effects of the illusion are found when the stimulus location becomes more unpredictable (19–23%). Conversely, manipulating the duration of the stimulus fails to reveal a clear difference in illusion effect. Finally, by computing the illusion effect for different saccadic latencies, we find a maximum illusion effect (about 30%) for very short latencies, which decreases by 7% with every 100 ms latency increase. We conclude that spatial predictability of the stimulus and saccadic latency influences the effect of the Müller-Lyer illusion on saccades.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of the Müller-Lyer illusion on saccades is modulated by spatial predictability and saccadic latency

Grave

Bruno

2010

Exp Brain Res

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A metanalysis of the effect of the Müller-Lyer illusion on saccadic eye movements: No general support for a dissociation of perception and oculomotor action

Bruno¹,

Knox²,

Grave³

2010

Vision Research

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Milner and Goodale's (1995) proposal of a functional division of labor between vision-for-perception and vision-for-action is supported by neuropsychological, brain-imaging, and psychophysical evidence. However, there remains considerable debate as to whether, as their proposal would predict, the effect of contextual illusions on vision-for-action can be dissociated from that on vision-for-perception. Meta-analytical efforts examining the effect of the Müller-Lyer (ML) illusion on pointing (Bruno, Bernardis, & Gentilucci, 2008) or grasping (Bruno & Franz, 2009) have been conducted to resolve the controversy. To complement this work, here we re-analyzed 17 papers detailing 21 independent studies investigating primary saccades to target locations that were perceptually biased by the ML illusion. Using a corrected percent illusion effect measure to compare across different studies and across experimental conditions within studies, we find that saccadic eye movements are always strongly biased by the illusion although the size of this effect can be reduced by factors such as display duration and between-trials variability in display length and orientation, possibly due to a process of saccadic adaptation. In contrast to some reports, we find no general support for differences between voluntary and reflexive saccades or between saccades performed in conjunction with a pointing movement and saccades performed without pointing. We conclude that studies on the effect of the Müller-Lyer illusion do not provide evidence for a functional dissociation between primary saccades and perception.

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Der Einfluss geometrisch-optischer Täuschungen auf sakkadische Augenbewegungen

Cited by 2 publications

References 19 publications

The effect of the Müller-Lyer illusion on saccades is modulated by spatial predictability and saccadic latency

The effect of the Müller-Lyer illusion on saccades is modulated by spatial predictability and saccadic latency

A metanalysis of the effect of the Müller-Lyer illusion on saccadic eye movements: No general support for a dissociation of perception and oculomotor action

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