Application of a 4IFC Adaptive Threshold Technique for Studies of TTS in Humans. I. Data from Minimally Trained Subjects.
ARMY MEDICAL RESEARCH LAB FORT KNOX KY
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A four interval, forced-choice 4IFC adaptive threshold technique was used with ten untrained subjects in an auditory masking study. Each subject supplied threshold data for two masking conditions and two in-the-quiet threshold conditions. The data obtained from each individual were analyzed rather than the group data, since the primary thrust of the investigation was individual threshold reliability. Except for three subjects, the data indicate highly consistent thresholds were obtainable with the 4IFC procedure. Some difficulty was encountered with respect to the required time to establish threshold. However, if this difficulty can be surmounted, it appears as though the 4IFC, adaptive procedure could be directly applicable to temporary threshold shifts studies. Author
- Anatomy and Physiology