Effect of Random Presentation on the Psychometric Function: Implications for a Quantal Theory of Discrimination

1944 ◽  
Vol 57 (4) ◽  
pp. 451 ◽  
Author(s):  
G. A. Miller ◽  
W. R. Garner
Keyword(s):  
Psychometric Function ◽  
Random Presentation ◽  
Quantal Theory

Verbal Punishment of Disfluencies in Normal Speakers

1965 ◽  
Vol 8 (3) ◽  
pp. 245-251 ◽  
Author(s):  
Gerald M. Siegel ◽  
Richard R. Martin
Keyword(s):  
Sharp Decrease ◽  
Random Presentation ◽  
Random Schedule

Forty normal speakers were divided into two groups to study the effects of two types of verbal punishment of disfluencies. The two conditions, Random and Contingent, were divided into three segments each. Punishment was not delivered in Segments 1 or 3. Segment 2 presented Random subjects with the tape recorded word “wrong” on a predetermined random schedule. Contingent subjects were delivered the word “wrong” after each disfluency. Random presentation of “wrong” did not significantly affect rate of disfluencies. Contingent presentation resulted in a sharp decrease in disfluencies during Segment 2, and an increase in disfluencies during Segment 3.

The psychometric function of infants detecting broadband noise

1998 ◽  
Vol 21 ◽  
pp. 755
Author(s):  
Lynne A. Werner ◽  
Julianne M. Siebens
Keyword(s):  
Psychometric Function ◽  
Broadband Noise

Word Recognition in Multitalker Babble Measured with Two Psychophysical Methods

2005 ◽  
Vol 16 (08) ◽  
pp. 622-630 ◽  
Author(s):  
Richard H. Wilson ◽  
Christopher A. Burks ◽  
Deborah G. Weakley
Keyword(s):  
Word Recognition ◽  
Background Noise ◽  
Pure Tone ◽  
Recognition Performance ◽  
Random Presentation ◽  
Presentation Level ◽  
Significant Difference ◽  
Northwestern University ◽  
And Performance ◽  
The Relationship

The purpose of this experiment was to determine the relationship between psychometric functions for words presented in multitalker babble using a descending presentation level protocol and a random presentation level protocol. Forty veterans (mean = 63.5 years) with mild-to-moderate sensorineural hearing losses were enrolled. Seventy of the Northwestern University Auditory Test No. 6 words spoken by the VA female speaker were presented at seven signal-to-babble ratios from 24 to 0 dB (10 words/step). Although the random procedure required 69 sec longer to administer than the descending protocol, there was no significant difference between the results obtained with the two psychophysical methods. There was almost no relation between the perceived ability of the listeners to understand speech in background noise and their measured ability to understand speech in multitalker babble. Likewise, there was a tenuous relation between pure-tone thresholds and performance on the words in babble and between recognition performance in quiet and performance on the words in babble.

A comparison of theory and experiment for photo-ionization cross-sections I. Neon and the elements from boron to neon

1951 ◽  
Vol 208 (1094) ◽  
pp. 408-418 ◽  
Keyword(s):  
Cross Sections ◽  
General Trend ◽  
Wave Functions ◽  
Ionization Cross ◽  
Hartree Fock ◽  
Quantal Theory ◽  
Ionization Cross Sections ◽  
Photo Ionization ◽  
Near Future ◽  
Dipole Length

The quantal theory of the continuous photo-electric absorption of radiation is briefly summarized, pàrticular attention being given to the alternative formulae available and to the accuracy to be expected in practical calculations. Detailed calculations are described for the photo-ionization cross-section of neon, a system for which it is understood that experimental data should be available in the near future. The calculation is made using Hartree-Fock wave functions and the two formulae of the dipole length and the dipole velocity. The corresponding cross-sections are found to be 5.8 and 4.4 x 10- 18 cm 2 . at the spectral head and to rise slowly with increasing frequency until a broad maximum is reached for an energy of the ejected electron of about 11 eV. A comparison is made with previous calculations on the elements from boron to neon ; the general trend of the results is discussed and improved estimates for boron and fluorine are given (10 x 10 -18 cm 2 . for boron and 4.3 x 10- 18 cm 2 . for fluorine at the spectral head).

The Psychometric Function: Continuation

2012 ◽  
pp. 141-166
Author(s):  
Kenneth Knoblauch ◽  
Laurence T. Maloney
Keyword(s):  
Psychometric Function

The Psychometric Function: Introduction

2012 ◽  
pp. 107-139
Author(s):  
Kenneth Knoblauch ◽  
Laurence T. Maloney
Keyword(s):  
Psychometric Function
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