Pain Measurement
NRS, pain
Participants verbally rated the pain intensity of each pressure stimulus on a Numeric Rating Scale (NRS), with the endpoints 0 representing no pain and 10 worst pain imaginable. Participants were able to rate their pain up to a decimal point. They were asked to only rate above zero (thus 0.1 and upwards) when they started to feel pain next to feeling a sensation of pressure. The verbally reported NRS ratings were entered into a computer by the experimenter after each trial.