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Predicted probability of habit-consistent action as a function of number of repetitions (black circles). The red line shows the least-squares fit of a three-parameter exponential model, y = a/(1 + exp(−b*x − c)). (Left) Experiment 1b, in which the habit concept was primed. (Right) Experiment 1c, in which the habit concept was not mentioned explicitly. Error bars represent standard error of the mean.
