Abstract
60 Ss were run in a 2 × 2 design, in which Ss were given three successive 20-trial blocks of choice alternatives for which the probability of the cue provided being correct was markedly different during the second 20-trial block, being high if the first and third were low, or vice versa. The other major independent variable was number of alternatives. Data were compared with Ss run under identical conditions without any interpolated changes in cue probability. The following conclusions were reached. The effect of experience is to shift behavior in the direction of a statistically more advantageous strategy. This effect is relatively small in the present situation because of the low risk nature of the experimental situation.
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