Absolute Judgments as a Function of Stimulus Uncertainty and Temporal Effects: Methodological Note

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Abstract
8 female Ss made absolute judgments of pure tones ac 4 levels of stimulus uncertainty, with 300 trials/level on each of 2 testing days. Sequence effects were balanced by a 4 × 4 Latin square design. Main effects in an analysis of variance showed significantly more correct responses in expected directions for stimulus uncertainty and higher scores on second testing day. Somewhat surprisingly, nonsignificant uncertainty-by-test-day interactions indicated homogeneous increases across uncertainty levels. Discussion focused on assumptions from information theory about asymptotic performance and on potential methodological value of Latin square repeated-measures designs for calculating T at different uncertainty levels.

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