The instruction given to participants before stimulation is translated from Norwegian: “You will now receive 30 electrical stimulations. The stimulations will come with a few seconds interval and will vary in strength. After each stimulation, please rate the pain from 0 (‘not painful’) and 10 (‘most intense pain imaginable’), as we have rehearsed earlier. While stimulation is ongoing, you should keep your eyes open and focus on the marking on the wall ahead of you. If you can avoid blinking, especially in the period directly following stimulation, that would be nice.” Subjects could use decimals when rating pain.

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