PsychologySensation & Perception

Point of Subjective Equality: Response Bias in York’s Constant-Stimuli Question 6

Explain why a preference for “longer” responses lowers the measured point of subjective equality in York’s constant-stimuli Question 6.

Question

Method of Constant Stimuli Worksheet — Question 6Suppose a left-handed participant favors the response ‘longer’ when the two stimuli look nearly equal. Relative to a participant without that response bias, would the point of subjective equality (PSE):A. increase;B. decrease; orC. remain unchanged?

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Evidence boundary

This answer addresses only Method of Constant Stimuli Worksheet Question 6 on page 35 of the cited York manual. It predicts the direction of the measured PSE shift under the stipulated response bias; it does not report an observed shift, quantify its size, or infer a general effect of left-handedness. The graph-dependent calculations in other worksheet questions are outside this standalone question.