scholarly journals Effect of Instant Coffee on Conditioned Suppression under Fixed Ratio or Fixed Interval Schedule of Food Reinforcement in Rats

1976 ◽  
Vol 7 (4) ◽  
pp. 383-392
Author(s):  
Sakutaro TADOKORO ◽  
Yoichiro HIGUCHI ◽  
Kyoichi OHASHI ◽  
Michiko SHIBAZAKI
Keyword(s):  
Conditioned Suppression ◽  
Food Reinforcement ◽  
Fixed Ratio ◽  
Fixed Interval ◽  
Interval Schedule ◽  
Fixed Interval Schedule ◽  
Instant Coffee

Brief Stimuli Paired with Food: Comparison of Two Schedule Arrangements

1975 ◽  
Vol 36 (1) ◽  
pp. 287-294 ◽  
Author(s):  
Richard L. Shull ◽  
Marilyn Guilkey ◽  
William Witty
Keyword(s):  
Fixed Ratio ◽  
Food Delivery ◽  
Fixed Interval ◽  
Second Order ◽  
Ratio Schedule ◽  
Interval Schedule ◽  
Response Patterns ◽  
Fixed Ratio Schedule ◽  
Fixed Interval Schedule

Pecks by pigeons produced food according to a fixed-interval schedule. Pecks also produced a brief blackout according to a small fixed-ratio schedule. Each food delivery was immediately preceded by a brief blackout, but not all blackouts were followed by food. The schedule of food and the schedule of blackouts were combined two ways. On one, a second-order schedule, each fixed-ratio completed during the fixed-interval produced the blackout. The first fixed-ratio completed after the fixed-interval elapsed produced the blackout-food compound. The second, a conjoint schedule, was identical except that the first peck after the fixed-interval elapsed produced the blackout-food compound regardless of the number of responses since the last blackout. Although the blackout was paired with food and was produced on a small fixed-ratio schedule under both arrangements, there was evidence of fixed-ratio-like response patterns only on the second-order schedule.

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.

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