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Validation of the three-parameter sigmoidal model used to estimate differences between curves displayed in Figure 3, that is, the effect of context on the reduction of pupil dilation. Model fits (dashed lines) are overlaid on ribbons that reflect ±1 standard error of the mean of the group data. Dots reflect latencies (directly labeled) for the predicted curves to reach the level of 10% reduction relative to the maximum value observed for the low-context sentences.
