High correlations between extraversion (E) and level of pain tolerance have been found in two experiments which used a method of continuously increasing level of the pain stimulus. The present experiments found no such correlation in two quite independent samples (ns = 29, 52) when a method of increasing the stimulation in discrete steps was used. The different findings appear to be due to the methods used in measuring pain tolerance, discrete steps vs continuous increase in pain stimulus. Nevertheless, the reported relationship between E and tolerance of intensity of a pain stimulus was not supported.
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