Interaction of contexts in context-dependent orientation estimation

Dekel, Ron; Sagi, Dov

doi:10.1016/j.visres.2020.02.006

Vision Research

2020

DOI: 10.1016/j.visres.2020.02.006

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Interaction of contexts in context-dependent orientation estimation

Ron Dekel

Dov Sagi

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Cited by 2 publications

References 73 publications

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A decision-time account of individual variability in context-dependent orientation estimation

Dekel

Sagi

2020

Vision Research

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Following exposure to an oriented stimulus, the perceived orientation is slightly shifted, a phenomenon termed the tilt aftereffect (TAE). This estimation bias, as well as other context-dependent biases, is speculated to reflect statistical mechanisms of inference that optimize visual processing. Importantly, although measured biases are extremely robust in the population, the magnitude of individual bias can be extremely variable. For example, measuring different individuals may result in TAE magnitudes that differ by a factor of 5. Such findings appear to challenge the accounts of bias in terms of learned statistics: is inference so different across individuals? Here, we found that a strong correlation exists between reaction time and TAE, with slower individuals having much less TAE. In the tilt illusion, the spatial analogue of the TAE, we found a similar, though weaker, correlation. These findings can be explained by a theory predicting that bias, caused by a change in the initial conditions of evidence accumulation (e.g., prior), decreases with decision time (Dekel & Sagi, 2019b). We contend that the context-dependence of visual processing is more homogeneous in the population than was previously thought, with the measured variability of perceptual bias explained, at least in part, by the flexibility of decision-making. Homogeneity in processing might reflect the similarity of the learned statistics. Highlights The tilt aftereffect (TAE) exhibits large individual differences. Reduced TAE magnitudes are found in slower individuals.  Reduced TAE in slower decisions can be explained by the reduced influence of prior. Therefore, individual variability can reflect decision making flexibility..

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A decision-time account of individual variability in context-dependent orientation estimation

Dekel

Sagi

2020

Vision Research

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Special issue: Calibrating the visual system

et al. 2022

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Interaction of contexts in context-dependent orientation estimation

Cited by 2 publications

References 73 publications

A decision-time account of individual variability in context-dependent orientation estimation

A decision-time account of individual variability in context-dependent orientation estimation

Special issue: Calibrating the visual system

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