scholarly journals A comparison of method-of-adjustment and forced-choice procedures in frequency discrimination

1976 ◽  
Vol 19 (1) ◽  
pp. 75-79 ◽  
Author(s):  
Craig C. Wier ◽  
Walt Jesteadt ◽  
David M. Green
Keyword(s):  
Frequency Discrimination ◽  
Forced Choice ◽  
Choice Procedures ◽  
Method Of Adjustment

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

Novel two-alternative forced choice paradigm for bilateral vibrotactile whisker frequency discrimination in head-fixed mice and rats

2013 ◽  
Vol 109 (1) ◽  
pp. 273-284 ◽  
Author(s):  
Johannes M. Mayrhofer ◽  
Vida Skreb ◽  
Wolfger von der Behrens ◽  
Simon Musall ◽  
Bruno Weber ◽  
...  
Keyword(s):  
Reaction Times ◽  
Stimulus Presentation ◽  
Frequency Discrimination ◽  
Forced Choice ◽  
Peak Performance ◽  
Perceptual Decision Making ◽  
Learning Rates ◽  
Behavioral Paradigm ◽  
Mystacial Vibrissae ◽  
Rats And Mice

Rats and mice receive a constant bilateral stream of tactile information with their large mystacial vibrissae when navigating in their environment. In a two-alternative forced choice paradigm (2-AFC), head-fixed rats and mice learned to discriminate vibrotactile frequencies applied simultaneously to individual whiskers on the left and right sides of the snout. Mice and rats discriminated 90-Hz pulsatile stimuli from pulsatile stimuli with lower repetition frequencies (10–80 Hz) but with identical kinematic properties in each pulse. Psychometric curves displayed an average perceptual threshold of 50.6-Hz and 53.0-Hz frequency difference corresponding to Weber fractions of 0.56 and 0.58 in mice and rats, respectively. Both species performed >400 trials a day (>200 trials per session, 2 sessions/day), with a peak performance of >90% correct responses. In general, rats and mice trained in the identical task showed comparable psychometric curves. Behavioral readouts, such as reaction times, learning rates, trial omissions, and impulsivity, were also very similar in the two species. Furthermore, whisking of the animals before stimulus presentation reduced task performance. This behavioral paradigm, combined with whisker position tracking, allows precise stimulus control in the 2-AFC task for head-fixed rodents. It is compatible with state-of-the-art neurophysiological recording techniques, such as electrophysiology and two-photon imaging, and therefore represents a valuable framework for neurophysiological investigations of perceptual decision-making.

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.

Viscosity Discrimination: A Comparison of an Adaptive Two-Alternative Forced-Choice and an Adjustment Procedure

Perception ◽  
1997 ◽  
Vol 26 (12) ◽  
pp. 1571-1578 ◽  
Author(s):  
Lynette Jones ◽  
Ian Hunter ◽  
Serge Lafontaine
Keyword(s):  
Weber Fraction ◽  
Reference Value ◽  
Forced Choice ◽  
Servo Control ◽  
The Other ◽  
Adjustment Procedure ◽  
Choice Procedure ◽  
Forced Choice Procedure ◽  
Method Of Adjustment ◽  
Methods Of Measurement

Differential thresholds for viscosity were measured in ten subjects with the use of an adaptive two-alternative forced-choice procedure. An electromagnetic linear motor was connected to each wrist and the viscosity of the motors was under computer servo control. For each block of 50 trials the viscosity of one motor was fixed at a reference value which ranged from 4 to 512 N s m−1, and the viscosity of the other motor varied according to the subject's responses. On each trial subjects were required to indicate which motor had the greater viscosity and were given feedback of the correct response. By this procedure the Weber fraction for viscosity was calculated to be 19%, which is lower than the Weber fraction of 34% estimated by using the method of adjustment. The criterion used for determining the threshold differs in the two procedures (71% and 84% correct, respectively), and the results from the two studies were found to be consistent. They suggest that the Weber fraction for viscosity remains remarkably stable despite differences in the methods of measurement.

Scaling the Episodic Familiarities of Pictures and Words

1995 ◽  
Vol 6 (5) ◽  
pp. 308-313 ◽  
Author(s):  
Douglas L. Hintzman ◽  
Tim Curran ◽  
David A. Caulton
Keyword(s):  
Frequency Discrimination ◽  
Forced Choice ◽  
Common Basis ◽  
Numerical Judgment ◽  
Frequency Judgments ◽  
Scaling Solution ◽  
Pictures And Words ◽  
Choice Frequency ◽  
Judgment Data

Most current memory theories assume that judgments of past occurrence are based on a unidimensional familiarity signal In a test of this hypothesis, subjects studied mixed lists of pictures and words that occurred up to three times each They then were given two tests a forced-choice frequency discrimination test including all pairs of conditions (e g, picture seen twice vs word never seen) and a numerical frequency judgment test on individual items Forced-choice proportions for all pairings (picture-picture, word-word, and picture-word) were well fit by a one-dimensional scaling solution, suggesting a common basis of recognition and frequency judgments for both pictures and words Both forced-choice and numerical judgment data indicated that familiarities of pictures started lower than those of words but increased more rapidly with repetition Results are discussed in connection with the distinction between familiarity and recall, and the possible role of rescaling in the mirror effect

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