Abstract
College students were preselected on the personality variables need Achievement (nAch) and manifest anxiety (Anx) to form a 3 by 3 factorial arrangement and to relate these measures to probability-learning, decisionmaking, and risk-taking behaviors. After receiving 90 training trials on each of three green lights which had probabilities of 1/6, 1/2, and 5/6 of being followed by a red event light (probability-learning), Ss were asked to make decisions about the predictive reliabilities of these lights when they occurred in combinations or singly, while the red light was covered (decision-making). Ss were then given a zero expected value gambling game and a double-or-nothing final bet. Neither personality variable showed a consistent relationship to probability-learning, decision-making, or risk-taking behavior according to various criteria.
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