Does past/current pain change pain experience? Comparing self-reports and pupillary responses.

In terms of pupillary response, the 4°C–10°C group exhibited a significant difference in pupil diameter, whereas this was marginally significant in the 10°C–4°C group (4°C–10°C: p < 0.001; 10°C–4°C: p = 0.062).

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