Table 1.

Descriptive summary of the correlations between regressors for all subjects

	N *	Mean r	SD	MIN	MAX
Low Pain – High Pain	20	−0.2312	N/A**	N/A**	N/A**
Low Pain - Ratings	12	0.0480	0.1713	−0.2810	0.4472
High Pain - Ratings	16	0.2873	0.2139	−0.1407	0.7651
Low Pain – Button Press	8	0.0203	0.0854	−0.1554	0.1909
High Pain – Button Press	17	0.1762	0.0823	−0.0098	0.3323
Ratings – Button Press	20	0.3696	0.1466	0.1180	0.6782

^*Number of subjects (maximum = 20) whose regressors show a significant correlation at p< .05.

^**Due to fixed experimental conditions there was no variation across subjects for these two regressors.