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SIGNAL DETECTION METHODS FOR MEASUREMENT OF UTILITY IN ANIMALS 1
Author(s) -
Wright Anthony A.,
Nevin John A.
Publication year - 1974
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.1974.21-373
Subject(s) - reinforcement , pecking order , electric shock , stimulus (psychology) , shock (circulatory) , detection theory , offset (computer science) , response bias , psychology , statistics , computer science , social psychology , cognitive psychology , mathematics , detector , physics , telecommunications , medicine , quantum mechanics , evolutionary biology , biology , programming language
Analytic methods of signal detection theory were employed to assess the utility of reinforcers. Four pigeons were trained to detect the presence or absence of a stimulus by pecking one of two side keys in a trial‐by‐trial choice paradigm. The relative rate of positive reinforcement for correct choices was varied to offset the biasing effects of electric shock for incorrect right side‐key choices. The effects of relative rate of reinforcement on bias were similar at all shock intensities even though the subjects' sensitivity changed during the course of the experiment. The relative rate of reinforcement required to produce equal bias was calculated and plotted against shock intensity to generate utility functions. The relative rate of reinforcement necessary to offset the bias induced by shock was an increasing function of shock intensity.