RECEIVER OPERATING CHARACTERISTICS DETERMINED UNDER SEVERAL INTERAURAL CONDITIONS OF LISTENING.
INDIANA UNIV BLOOMINGTON HEARING AND COMMUNICATION LAB
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The ability of subjects to detect sinusoidal signals in a continuous background of white gaussian noise was investigated for several different interaural relations of the signal and of the noise stimuli. The functions relating the proportion of correct detections of the signal to the proportion of false alarms were determined in each case. These functions are referred to as receiver operating characteristics, or ROCs. A rating procedure was employed to determine the ROCs. The area under the ROC was found to be a good estimate of the percent correct obtained with a two-interval forced-choice technique -- a relation to be expected on theoretical grounds. The ROCs were not significantly affected by the presence of trial-by-trial feedback. In addition, the ROCs obtained when signals of differing intensity were mixed in blocks of trials were found to be quite similar to those obtained when only one signal intensity was presented in any given block of trials. Author