Determinants of timing performance on the peak procedure
McHugh, M. E. (2012). Determinants of timing performance on the peak procedure (Thesis, Master of Applied Psychology (MAppPsy)). University of Waikato, Hamilton, New Zealand. Retrieved from http://hdl.handle.net/10289/6640
Permanent Research Commons link: http://hdl.handle.net/10289/6640
The performance of brown shaver hens gallus gallus domesticus, was investigated using a peak procedure as a method to examine the timing abilities of an animal. Peak procedure involves using a combination of peak interval and fixed interval trials, where the peak intervals are four to 10 times long than the FI. Responses during the longer PI trials are not reinforced and do not require a response to end the trial. The Peak procedure generates a pattern of responding that increases to a maximum at the time where behaviour is normally reinforced. The research was conducted on six domestic hens, which underwent FI schedule pretraining and then were introduced to peak testing, FI 20-s/PI 200-s, FI 40/PI 400-s and FI 20-s/PI 80-s schedules. The First 3 condition involved FI 20-s PI 200-s and FI 40-s and PI 400-s schedules, with no house light on during the sessions. The distribution showed a peak at or near the expected time to reinforcement, followed by a steady decrease in responding. The extended period of the trials showed a resonances pattern of responding during the remainder of the trial, with some birds showing resurgence. Condition 7 used FI 20 PI 200-s schedules with a houselight turn on for the whole duration. The response rate increased to the highest point at or near the expected time of reinforcement for all birds, followed by a decrease in responding to a minimum of 1 peck per second. The remainder of the trial displayed a resonances pattern of responding, with half the birds showing resurgences. Condition 8 used FI 20-s PI 200-s schedules with a houselight on during the trial and ITI and off during reinforcement. Patterns of responding were similar to what was seen in the previous conditions. The final condition used FI 20-s PI 80-s schedules with a houselight on during the trial and ITI and off during reinforcement. Responding was similar to the previous conditions with an increase in responding reaching a maximum at or near the expected time to reinforcement and a decrease followed by a resonances pattern of responding for the duration of the trial.
University of Waikato
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