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J Opt Soc Am. 1978 Feb;68(2):266-7.

Effect of chromatic uncertainty on detectability of a visual stimulus.


The detectability of a brief color shift towards red or towards green of a foveally viewed yellow target is less by 25% if the observer is uncertain as to the direction of the color shift. This result matches a prediction of the theory of signal detectability: When signal parameters become uncertain, detectability declines.

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