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Weights on the speeds of trials n − 1 to n − 8. Human observers’ weights on the past trials (circles) are consistent with the performance of correlated speed model (diamonds) in that the weights sharply drop after n −1 trial. The adaptive mean model (squares) gives relatively large weights to the past trials. Human observers’ weights are computed from the first session of all 48 subjects’ data. Error bars represent SEs.
