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Participants in pain had smaller task-evoked pupillary responses, which is thought to be an indicator of task engagement. However, the behavioral effects of pain from Experiments 1 and 2 were not replicated in Experiment 3. Taken together, pain led to poorer performance in the form of an increase in the relative frequency and extremeness of slow responses, increases in off-task thoughts, and reductions in a physiological indicator of task engagement. These data speak to theories of how pain competes with task goals for attention and neg