Psychology and Neuroscience Stack Exchange
Psychology and Neuroscience Stack Exchange

Questions tagged [psychophysics]

For questions about the quantitative study of varying a stimulus's properties to observe the effect on sensation (and perception)

For questions about the quantitative study of varying a stimulus's properties to observe the effect on sensation (and perception).

Related: .

For more information, see Psychophysics.

75 questions
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Decrease in d' with concurrent increase of criterion

I was reading about an experimental condition where subjects d' (sensitivity) decreases, while at the same time their criterion is increasing (a shift to the right). The authors were arguing with a decrease in the hit rates. I was wondering how this…
user21198
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How are people working in psychophysics trained?

It is unclear to me how people in psychophysics are trained. Are they psychologists, or physicists, or physicians, or biologists, or physiologists? Or can they be any of those? What if someone doing psychophysics (according to his own accord) is…
jjack
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How can I fit a psychometric function such that the minimum is 50% (chance level)?

I have data from the behavioral component of an fMRI study in which subjects are asked to perform a 2AFC discrimination task with targets at variable contrast. That is, a target will be presented at one of several possible contrasts, and the…
Louis Thibault
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Modeling psychophysical data: appropriate visualization to account for experimental design

Background information: I am modeling psychophysical data at the trial level for the first time. The data stem from a visual line bisection task with constant stimulus intensity, the response variable is bivariate (right vs. left) and is effect…
atsi
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