Searching for illusory motion

Thornton, Ian M.; Zdravković, Sunčica

doi:10.3758/s13414-019-01750-3

Cited by 5 publications

(6 citation statements)

References 64 publications

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“…This finding suggests that the effect of illusory motion on time perception is not affected by cognitive factors. This finding supports the idea that illusory motion, in addition to real motion, can be considered a fundamental visual feature [ 29 ].…”

Section: Discussionsupporting

confidence: 88%

“…Although we cannot exclude that the illusory stimulus may be more salient than the static stimulus, a similar argument can be made for physical motion versus static motion. Notably, both illusory motion and physical motion can pre-attentively guide visual perception in a visual search, with illusory motion “popping out” in a manner analogous to physical motion, thus facilitating parallelized search [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

“…For instance, in a series of four experiments, standard visual search was used to explore whether the onset of illusory motion pre-attentively guides vision in the same way that the onset of real motion is known to do. The results showed that the illusory motion “pops out” the same way as the physical motion, irrespective of the size of the set of elements [ 29 ]. Another study meticulously examined the impact of real, illusory, and implied motion on pupil diameter.…”

Section: Introductionmentioning

confidence: 99%

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An Illusory Motion in Stationary Stimuli Alters Their Perceived Duration

Contemori,

Meneghini,

Battaglini

2023

Vision

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Despite having equal duration, stimuli in physical motion are perceived to last longer than static ones. Here, we investigate whether illusory motion stimuli produce a time-dilation effect similar to physical motion. Participants performed a duration discrimination task that compared the perceived duration of static stimuli with and without illusory motion to a reference stimulus. In the first experiment, we observed a 4% increase in the number of “longer” responses for the illusory motion images than static stimuli with equal duration. The time-dilation effect, quantified as a shift in the Point of Subjective Equality (PSE), was approximately 55 ms for a 2-second stimulus. Although small, the effect was replicated in a second experiment in which the total number of standard-duration repetitions was reduced from 73 to 19. In the third experiment, we found a positive linear trend between the strength of the illusory motion and the magnitude of the time-dilation effect. These results demonstrate that, similar to physical motion stimuli, illusory motion stimuli are perceived to last longer than static stimuli. Furthermore, the strength of the illusion influences the extent of the lengthening of perceived duration.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Illusory Motion in Stationary Stimuli Alters Their Perceived Duration

Contemori,

Meneghini,

Battaglini

2023

Vision

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“…Feature integration theory has been supported by a plethora of research (see Quinlan, 2003;Humphreys, 2016 for reviews), and while it has been partially subsumed into more comprehensive theories (e.g., Duncan and Humphreys, 1989;Desimone and Duncan, 1995), it has undeniably made a significant contribution to our understanding of visual attention. While early work using this model was largely restricted to analysis of basic features such as colour and shape, subsequent work has included dynamic features such as direction of motion (Dick et al, 1987;Thornton and Zdravković, 2020) and axis of rotation (Schill et al, 2020). Recently, feature integration theory has been particularly useful in the development of a concrete operationalisation of perceptual load.…”

Section: Feature Integration Theorymentioning

confidence: 99%

Visual Search in 3D: Effects of Monoscopic and Stereoscopic Cues to Depth on the Validity of Feature Integration Theory and Perceptual Load Theory

et al. 2021

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Previous research has successfully used feature integration theory to operationalise the predictions of Perceptual Load Theory, while simultaneously testing the predictions of both models. Building on this work, we test the extent to which these models hold up in a 3D world. In two experiments, participants responded to a target stimulus within an array of shapes whose apparent depth was manipulated using a combination of monoscopic and stereoscopic cues. The search task was designed to test the predictions of (a) feature integration theory, as the target was identified by a single feature or a conjunction of features and embedded in search arrays of varying size, and (b) perceptual load theory, as the task included congruent and incongruent distractors presented alongside search tasks imposing high or low perceptual load. Findings from both experiments upheld the predictions of feature integration theory, regardless of 2D/3D condition. Longer search times in conditions with a combination of monoscopic and stereoscopic depth cues suggests that binding features into three-dimensional objects requires greater attentional effort. This additional effort should have implications for perceptual load theory, yet our findings did not uphold its predictions; the effect of incongruent distractors did not differ between conjunction search trials (conceptualised as high perceptual load) and feature search trials (low perceptual load). Individual differences in susceptibility to the effects of perceptual load were evident and likely explain the absence of load effects. Overall, our findings suggest that feature integration theory may be useful for predicting attentional performance in a 3D world.

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“…Thus, R&W concluded from their analysis that "the recommendation by Miller (1988) to not use the median when comparing distributions that differ in sample size was ill-advised" (p. 37). Their conclusions have been influential in encouraging researchers to analyze median RTs (e.g., Gordon et al, 2020;Maksimenko et al, 2019;Thornton & Zdravković, 2020).…”

mentioning

confidence: 99%

Another Warning about Median Reaction Time --- Version of 11 Feb 2020

Miller¹

2020

Preprint

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The present simulations examine the power of bias-corrected medians to detect true experimental effects on reaction time and compare this power with the power of analyses using means and regular medians. Unfortunately, although bias-corrected medians solve the problem of inflated Type I error rates, their power is lower than that of means or regular medians in many realistic situations. The simulations demonstrate that means will often provide the most powerful test for condition differences, and they show what aspects of the RT distributions should be checked to determine whether means or medians will provide greater power.

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Searching for illusory motion

Cited by 5 publications

References 64 publications

An Illusory Motion in Stationary Stimuli Alters Their Perceived Duration

An Illusory Motion in Stationary Stimuli Alters Their Perceived Duration

Visual Search in 3D: Effects of Monoscopic and Stereoscopic Cues to Depth on the Validity of Feature Integration Theory and Perceptual Load Theory

Another Warning about Median Reaction Time --- Version of 11 Feb 2020

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