scholarly journals Variable-interval and fixed-interval schedule preferences in pigeons as a function of signaled reinforcement and schedule length

1976 ◽  
Vol 8 (6) ◽  
pp. 445-448 ◽  
Author(s):  
Sandra M. Schrader ◽  
Howard Rachlin
Keyword(s):  
Variable Interval ◽  
Fixed Interval ◽  
Interval Schedule ◽  
Fixed Interval Schedule ◽  
Schedule Length ◽  
Signaled Reinforcement

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.

Effects of Intermittent Reinforcing Consequences on Task Choice

1971 ◽  
Vol 28 (3) ◽  
pp. 771-776 ◽  
Author(s):  
David R. Schmitt
Keyword(s):  
Variable Interval ◽  
Fixed Interval ◽  
Variable Interval Schedule ◽  
Interval Schedule ◽  
Experimental Setting ◽  
Fixed Interval Schedule ◽  
Task Choice ◽  
Concurrent Operants ◽  
Wide Range ◽  
Comparison Of The Results

The study explored the effects of supplementary reinforcement on 1 of 2 tasks as an element determining task choice. In an experimental setting work on the lower paying of 2 concurrent operants received additional reinforcement on either a fixed or variable interval schedule. A wide range of addition magnitudes were studied under each schedule. The results from 8 Ss working for a number of hours on either a fixed or variable interval schedule indicated that addition magnitude significantly affected task choice only when additions were available at unequal intervals. Under this schedule the higher the additions the greater the time spent on the lower paying task. The fixed interval schedule produced a small amount of time on the lower paying task regardless of addition magnitude. The results extend and replicate previous research on the effects of schedules of monetary penalties on task choice in a similar setting. Comparison of the results from the 2 studies suggests that additions and penalties when applied to opposing tasks in a concurrent setting have similar effects on patterns of task choice.

scholarly journals A FIXED INTERVAL SCHEDULE IN WHICH THE INTERVAL IS INITIATED BY A RESPONSE

1963 ◽  
Vol 6 (3) ◽  
pp. 323-330 ◽  
Author(s):  
Francis Mechner ◽  
Laurence Guevrekian ◽  
Vicki Mechner
Keyword(s):  
Fixed Interval ◽  
Interval Schedule ◽  
Fixed Interval Schedule

Reinforcer concentration effects on a fixed-interval schedule

2004 ◽  
Vol 67 (1) ◽  
pp. 55-66 ◽  
Author(s):  
Frances J Blomeley ◽  
C.F Lowe ◽  
J.H Wearden
Keyword(s):  
Fixed Interval ◽  
Interval Schedule ◽  
Concentration Effects ◽  
Fixed Interval Schedule
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