Intensity perception. VII. Further data on roving-level discrimination and the resolution and bias edge effects

Abstract

Two-interval roving-level intensity discrimination [in human subjects] and the dependence of resolution and bias on level within the range of roving levels (the resolution and bias edge effects) were investigated. The experimental parameters considered were the intensity range R, the intersignal duration T and the pulse duration Tp. To obtain a picture of the natural bias, no feedback was presented. The results on the dependence of resolution on level were compared to previous results of the same type obtained from 1-interval identification experiments. Discrepancies between the experimental results and the preliminary theory of intensity resolution were identified and implications of the data for an improved theory were discussed.