Operating Characteristics, Signal Detectability, and the Method of Free Response

摘要: The method of free response refers to the following listening situation. Against a background noise, weak signal is presented several times in long (2‐min) observation interval. temporal intervals between presentations tones are randomly distributed; consequently, listener does not know when tone will occur, and he how many be presented. From one series next, instructed adopt various criteria press single response‐key each time “hears tone.” problem consists determination procedure that allows total number yes responses partitioned meaningfully “hits” “false alarms.” A model developed which measurable quantity, rate response, related “hit rate” “false‐alarm rate.” Although criterion adopted by cannot directly evaluated, use wide range makes it possible estimate detectability ds signal. Two experiments described, results support model.