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Random dot stimuli used by Shadlen's lab

I was wondering if somebody ever coded the random dot kinematogram (RDK) algorithm commonly used by Shadlen’s lab (e.g., Roitman & Shadlen, 2002). This post on the forum (DotStim with small number of dots (+ ideas on future updates)) explains issues when trying to approximate the algorithm with Psychopy’s Dots functions, but it looks like nobody followed up.

on the forum, but it looks like nobody followed up.


I ended up coding it using ElementArrayStim:, used it in a few experiments since then


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@cherepaha Excellent. Would be cool to incorporate it in PsychoPy, as this algorithm is massively used.

@jon is there interest in this?