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EFFECTS OF CHLORPROMAZINE IN THE PIGEON UNDER A SECOND‐ORDER SCHEDULE OF FOOD PRESENTATION 1
Author(s) -
Marr M. Jackson
Publication year - 1970
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1970.13-291
Subject(s) - stimulus (psychology) , chlorpromazine , schedule , food delivery , interval (graph theory) , psychology , mathematics , computer science , medicine , pharmacology , combinatorics , cognitive psychology , marketing , business , operating system
Chlorpromazine was studied for its effects on responding under a second‐order schedule in which food was presented following a sequence of 20 one‐minute fixed‐interval components. A brief visual stimulus occurred at the completion of each fixed interval including the one that terminated with food presentation. Chlorpromazine showed rate‐dependent effects in that it increased low rates in the early components of the second‐order schedule and, to a lesser extent, decreased high rates in the later components. Chlorpromazine also increased rates in the early quarters within the 1‐min fixed‐internal components and to a smaller extent decreased rates in the final quarter. The alteration in the patterns of responding within 1‐min fixed‐interval components terminating in a brief stimulus presentation was substantially less than that which occurred throughout the succession of 1‐min fixed‐interval components terminating in food presentation, thus suggesting that the presentation of the brief stimulus exerted more control over responding within components than did food presentation over the sequence of components. This result and others suggest that studies using drugs may be useful in elucidating the factors controlling patterns of responding in second‐order schedules.