Abstract
Various methods for determining threshold in a group testing situation were compared. No significant differences in reliability were found between the method of adjustment (either direct or indirect) and the method of “single descent,” in which the listener presses a button “just when the beeps disappear.” However, the method of single descent is independent of individual differences in adjustment time and requires less apparatus. Thresholds determined by single descent were affected only slightly by rate of descent, starting level and practice factors. A comparison between single descent and the standard clinical technique showed the thresholds to be valid. Field performance of the method, in a 10-man group audiometer, has fulfilled expectations from the pilot studies.
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