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. 2012 Feb 21;3:24. doi: 10.3389/fpsyg.2012.00024

Table 1.

The two new problems studied in Experiment 1, and the main results.

Problem (N) Recent events
Experimental results
The predictions of I–SAW
Recent choice Recent payoff from R Contingent R-rate Implied recency effect R-rate over all trials Contingent R-rate Implied recency effect R-rate over all trials
1 (48) S: 0 with certainty R: (10, 0.1; −1) S High: +10 0.23 + 0.29 0.25 + 0.41
Low: −1 0.06 0.11
R High: +10 0.60 0.81
Low: −1 0.79 0.82
2 (48) S: 0 with certainty R: (1, 0.9; −10) S High: +1 0.21 0.57 0.18 0.59
Low: −10 0.31 0.20
R High: +1 0.84 + 0.89 +
Low: −10 0.69 0.75

The contingent R-rates are the proportions of R choices as a function of the recent choice and the recent payoff from R. The implied recency effect is the sign of the difference between the R-rates after high and low payoffs from R given the same recent choice. When the recent choice is S, the recent payoffs from R are the recent “forgone payoffs,” and the contingent R-rate is the proportion of switches from S to R. When the recent choice is R, the recent payoffs from R are the recent “obtained payoffs”, and the contingent R-rate is the proportion of repeated R choices. N is the number of subjects.