Journal: Journal of Vision

Article Title: Serial dependence alters perceived object appearance

doi: 10.1167/jov.20.13.9

Figure Lengend Snippet: Procedure. (Left) On each trial, a Gabor patch appeared at the test location (pink circle). (The patches and masks are stylized here for ease of viewing, and the difference between test and distractor patches is exaggerated for visibility). Eleven distractor patches appeared at random locations that changed on each trial. The patches stayed on for 500 ms and were then replaced by a mask until participants responded as to whether an oddball was present or absent. The insets on the right illustrate the predictions and hypothetical results. Between trials 1 and 2, there is a positive relative orientation between test Gabor patches (i.e., trial 1 Gabor is more counterclockwise than trial 2 Gabor). Because distractors are more clockwise than the test, any SD between test patches will pull the test in the counterclockwise direction, away from the distractors. The physical distance between test and distractors is smaller than the perceived distance, thus the proportion of oddball responses should increase. Between trials 2 and 3, the relative orientation between test patches is negative, the physical discrepancy would therefore be larger than the perceived discrepancy (if the appearance is influenced by SD) and the proportion oddball trials should decrease. The hypothesis that performance will depend on relative orientation is illustrated by the orange curve in the cartoon results. The blue curve illustrates the alternative hypothesis of no effect of the previous trial on perceived orientation.

Article Snippet: Stimuli were full-contrast Gabor patches generated with Psychtoolbox for Matlab ( ; ; ).

Techniques:

Journal: Journal of Vision

Article Title: Serial dependence alters perceived object appearance

doi: 10.1167/jov.20.13.9

Figure Lengend Snippet: (Top) Grand averages. Proportion of “oddball” responses as a function of the relative orientation between test Gabor patches, for oddball (red) and no-oddball (green) trials. Dashed lines represent bootstrapped median and 95% confidence intervals for each condition, and modulations that differ significantly from the mean are represented as filled dots. The inset shows the median and 95% confidence intervals for the amplitude of individual DoG fits. (Bottom) The mean number of trials per data point.

Article Snippet: Stimuli were full-contrast Gabor patches generated with Psychtoolbox for Matlab ( ; ; ).

Techniques:

Journal: Journal of Vision

Article Title: Serial dependence alters perceived object appearance

doi: 10.1167/jov.20.13.9

Figure Lengend Snippet: (Top) Grand averages. Sensitivity (d′) and criterion (c) as a function of the relative orientation between test Gabor patches. Dashed lines represent bootstrapped median and 95% confidence intervals for each condition, and modulations that differ significantly from the mean are represented as filled dots. The inset shows the median and 95% between-subject confidence intervals for the difference between maximum and minimum d’ values. (Bottom) Mean number of trials per data point.

Article Snippet: Stimuli were full-contrast Gabor patches generated with Psychtoolbox for Matlab ( ; ; ).

Techniques:

Journal: Journal of Vision

Article Title: Serial dependence alters perceived object appearance

doi: 10.1167/jov.20.13.9

Figure Lengend Snippet: DoG fits of the proportion oddball responses as a function of the relative orientation between the current test Gabor patch and the Gabor patch n trials in past (increasingly pale shades of red). The grey line is for illustrative purposes: the proportion of oddball responses as a function of relative orientation between future and current trials could not be fit with a DoG. The bottom inset shows median (and 95% confidence intervals) as a function number of trials into the past.

Article Snippet: Stimuli were full-contrast Gabor patches generated with Psychtoolbox for Matlab ( ; ; ).

Techniques:

Journal: Scientific Reports

Article Title: Microsaccades mediate perceptual alternations in Monet’s “Impression, sunrise”

doi: 10.1038/s41598-021-82222-3

Figure Lengend Snippet: Microsaccade dynamics before transitions toward perceptual intensification versus fading. Average probability of microsaccades before transitions toward perceptual intensification (red) versus fading (blue) for ( A ) Monet’s sun and ( B ) a Gabor patch. The solid vertical line indicates the reported transitions (time = 0). The grey dashes along the top of the plots indicate the bins where microsaccade rates before transitions to intensification were significantly higher than microsaccade rates before transitions to fading (two-tailed paired t tests with Bonferroni correction, bin size = 20 ms, p < 0.05). Red and blue shading indicates the SEM across subjects (N = 22). Because trials from the two conditions were interleaved, both panels show data from the same participants, collected during the same sessions.

Article Snippet: We demonstrated that the relationship between microsaccade production and the reversal and prevention of Troxler fading applies not only to the viewing of contrived stimuli such as Gabor patches, but also to the observation of Monet’s masterpiece.

Techniques: Two Tailed Test