A comparison of detection thresholds obtained with forced‐choice procedures and with a standard clinical procedure

1983 ◽  
Vol 73 (S1) ◽  
pp. S45-S45 ◽  
Author(s):  
Lynne Marshall ◽  
Walt Jesteadt
Keyword(s):  
Forced Choice ◽  
Detection Thresholds ◽  
Clinical Procedure ◽  
Choice Procedures

Comparison of Pure-Tone Audibility Thresholds Obtained with Audiological and Two-Interval Forced-Choice Procedures

1986 ◽  
Vol 29 (1) ◽  
pp. 82-91 ◽  
Author(s):  
Lynne Marshall ◽  
Walt Jesteadt
Keyword(s):  
Response Bias ◽  
Pure Tone ◽  
Sound Pressure ◽  
Forced Choice ◽  
Adaptive Procedure ◽  
Clinical Procedure ◽  
Clinical Procedures ◽  
Choice Procedures ◽  
Adaptive Thresholds ◽  
The Difference

Audibility thresholds were measured at 500 and 4000 Hz with a standard clinical procedure and a two-interval, forced-choice (2IFC) adaptive procedure for 72 normal-hearing and hearing-impaired listeners, age 17 to 83. Psychometric functions were obtained for clinical, 2IFC, and Yes-No procedures. A measure of response bias was obtained from the Yes-No procedure. The 2IFC adaptive thresholds were 6.5 dB lower than audiological thresholds. The psychometric functions for the forced?choice procedures were generally shallower than those for the clinical procedure and were shifted to lower sound pressure levels. Response bias played a small role at best in accounting for the magnitude of the difference in threshold estimated by the adaptive and clinical procedures or for the differences among the psychometric functions.

Observed variability in d′ for yes‐no and two‐interval forced choice procedures

2006 ◽  
Vol 120 (5) ◽  
pp. 3124-3124
Author(s):  
Walt Jesteadt ◽  
Lori Leibold ◽  
Samar Khaddam ◽  
Jessica Messersmith ◽  
Melissa Krivohlavek
Keyword(s):  
Forced Choice ◽  
Choice Procedures

Pitch versus Brightness of Timbre: Detecting Combined Shifts in Fundamental and Formant Frequency

1993 ◽  
Vol 11 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Laurent Demany ◽  
Catherine Semal
Keyword(s):  
Power Spectrum ◽  
Fundamental Frequency ◽  
Forced Choice ◽  
Spectral Envelope ◽  
Adaptive Procedure ◽  
Formant Frequency ◽  
Detection Thresholds ◽  
Perceptual Integration ◽  
Standard Tone ◽  
Independence Model

The pitch of a periodic tone depends on its fundamental frequency (F0), and the brightness of its timbre depends on the centroid of its power spectrum (Fc). The goal of the present study was to determine whether small shifts in F0 and in Fc are detected independently of each other. The standard tone used had an F0 of 400 Hz, five harmonics (400-2000 Hz), and a triangular spectral envelope peaking at an Fc of 1000 Hz. With a forced-choice adaptive procedure, detection thresholds were measured for (1) shifts in F0 alone (Fc being fixed), (2) shifts in Fc alone (F0 being fixed), and (3) combined shifts in F0 and Fc. The two components of the combined shifts were chosen to have the same level of detectability when presented alone. Overall, as expected from the independence model, the combined shifts were not better detected when their two components had the same direction (F0 and Fc both increase, or both decrease) than when they had opposite directions. However, substantial differences between subjects were observed with respect to the perceptual integration of shifts in F0 and in Fc.

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