Previous Mental Load and Incentives Influence Anticipatory Arousal as Indexed by the Baseline Pupil Diameter in a Speech-in-Noise Task.

Although the SNR × monetary incentive × probe time interaction on the self-reported tendency to quit did not reach statistical significance, the size of this effect was medium; on average participants rated largest tendency to quit in the post-fatigue-hard SNR-low Incentive block.

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On the other hand, although not statistically significant, self-rated effort showed an increasing trend from pre- to post-fatigue for all the incentive and SNR conditions, suggesting that participants may have felt the need for compensatory effort in the post-load sequence block in order to keep up.

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