Table 4. Contingency table for perception of the thermal grill illusion (TGI).
Gender | Category | Low 5-HTT | High 5-HTT |
Male | TGI-responder | 5 | 4 |
Poor-responder | 4 | 4 | |
Female | TGI- responder | 2 | 12 |
Poor-responder | 10 | 3 |
VAS-ratings of the sensory-discriminatory dimension (pain intensity) and the affective-motivational dimension (unpleasantness) were used in this tentative dichotomization of subjects. See section ‘TGI-response, sensory vs affective ratings’ for the criteria used.