Effect of monetary reward level on memory precision in Experiment 3.

(A) Subject-averaged circular variance of the estimation error distribution as a function of the trial-by-trial score multiplier. Payment Condition 1 refers to the group of subjects whose bonus was calculated on the score summed across all trials and Payment Condition 2 to the group whose bonus was calculated on 9 randomly selected trials. Error bars indicate 1 s.e.m.