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note

• the idea of the central tendency bias dates back to Hollingworth 1910, who had subjects select standard cardboard squares that matched the size of previously presented targets after a short retention interval. the size of the standard squares varied by trial. when standard > target, the response was <target, and vice versa

“central tendency bias, where sensory estimates are biased towards the mean of recently seen stimu” (pdf)

this bias has the potential to corrupts a variety of perceptual judgments. as such accounting for this bias in continuous response measures it crucial to maximize power and to insure that estimates of precision refer to the true sensory precision

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