96 Ss learned a 23-row button maze under 1 of 3 stress conditions and partial or continuous reinforcement. Stress conditions were error, error and speed instruction, or error and speed instruction plus irrelevant shock. Number of errors were an increasing function of stress, but rate (responses per second) suggested a non-monotonic function. Reinforcement schedule was not an effective variable. Results were discussed with relation to competing response tendencies associated with motivation.
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