DSP4 alters the effect of d-amphetamine on variable-interval performance: analysis in terms of Herrnstein's equation

1987 ◽  
Vol 92 (2) ◽  
Author(s):  
M.J. Morley ◽  
C.M. Bradshaw ◽  
E. Szabadi
Keyword(s):  
Performance Analysis ◽  
Variable Interval ◽  
Herrnstein's Equation

The effect of pentobarbitone on variable-interval performance: Analysis in terms of Herrnstein's equation

1984 ◽  
Vol 84 (4) ◽  
pp. 520-525 ◽  
Author(s):  
H. V. Ruddle ◽  
M. J. Morley ◽  
C. M. Bradshaw ◽  
E. Szabadi
Keyword(s):  
Performance Analysis ◽  
Variable Interval ◽  
Herrnstein's Equation

Herrnstein's Equation: Data from 110 Rats

1993 ◽  
Vol 73 (3_suppl) ◽  
pp. 1355-1361 ◽  
Author(s):  
C. M. Bradshaw ◽  
E. Szabadi
Keyword(s):  
Normal Distribution ◽  
Response Rate ◽  
Variable Interval ◽  
Response Strength ◽  
Reinforcement Rate ◽  
Half Maximum ◽  
Wide Range ◽  
Hyperbolic Curve ◽  
Sucrose Reinforcement ◽  
Herrnstein's Equation

110 rats were trained under a series of variable-interval schedules of sucrose reinforcement (0.6 M, 50 μl), covering a wide range of scheduled interreinforcement intervals. Response and reinforcement rates recorded during the last five sessions of exposure to each schedule were used to fit Herrnstein's (1970) hyperbolic ‘response strength’ equation to the data from each rat The equation accounted for >80% of the data variance in 90%, and >90% of the variance in 60% of the sample. The distribution of the values of Rmax, the asymptote of the hyperbolic curve, did not depart significantly from normality. However, the distribution of the values of KH, the reinforcement rate needed to maintain the half-maximum response rate, was markedly skewed; logarithmically transformed values of KH conformed to a normal distribution. The data provide further support for the applicability of Herrnstein's equation to variable-interval performance; it is suggested that studies involving comparison of the parameters of the equation between groups of subjects should adopt logarithmic transformation of the values of KH.

The Effects of Variable-Interval and Fixed-Interval Signal Presentation Schedules on the Auditory Evoked Response

1969 ◽  
Vol 12 (1) ◽  
pp. 199-209 ◽  
Author(s):  
David A. Nelson ◽  
Frank M. Lassman ◽  
Richard L. Hoel
Keyword(s):  
Variable Interval ◽  
Tone Burst ◽  
Signal Amplitude ◽  
Fixed Interval ◽  
Interval Schedule ◽  
Sensation Level ◽  
Fixed Interval Schedule ◽  
Auditory Evoked Responses ◽  
Auditory Evoked Response ◽  
Signal Presentation

Averaged auditory evoked responses to 1000-Hz 20-msec tone bursts were obtained from normal-hearing adults under two different intersignal interval schedules: (1) a fixed-interval schedule with 2-sec intersignal intervals, and (2) a variable-interval schedule of intersignal intervals ranging randomly from 1.0 sec to 4.5 sec with a mean of 2 sec. Peak-to-peak amplitudes (N 1 — P 2 ) as well as latencies of components P 1 , N 1 , P 2 , and N 2 were compared under the two different conditions of intersignal interval. No consistent or significant differences between variable- and fixed-interval schedules were found in the averaged responses to signals of either 20 dB SL or 50 dB SL. Neither were there significant schedule differences when 35 or 70 epochs were averaged per response. There were, however, significant effects due to signal amplitude and to the number of epochs averaged per response. Response amplitude increased and response latency decreased with sensation level of the tone burst.

Variable Interval = 7.67 Years

1976 ◽  
Vol 21 (3) ◽  
pp. 183-184
Author(s):  
DAVID G. ELMES
Keyword(s):  
Variable Interval

Human Performance Analysis Tool (HPAT)

2009 ◽  
Author(s):  
Milt Stretton
Keyword(s):  
Performance Analysis ◽  
Human Performance ◽  
Analysis Tool

Behavior Regulation on Simple Variable Interval Schedules

1992 ◽  
Author(s):  
James D. Dougan
Keyword(s):  
Variable Interval ◽  
Behavior Regulation
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