Table 1. The unstandardised and standardised regression coefficients for the variables included in the model which best accounted for variance in Helping.

Predictors	B	SE b	B	t-value	p-value
Step 1
Constant	0.4	0.07
SCR_Other_Pain	0.59	0.23	0.51	2.54	0.011
Step 2
Constant	0.58	0.09
SCR_Other_Pain	0.58	0.2	0.5	2.85	0.011*
Self-Other SCR Difference	−0.4	0.16	−0.46	−2.59	0.019*

SCR_Other_Pain = Skin conductance responses when observing the other's pain; Self-Other SCR Difference = absolute difference between skin conductance responses when participants received pain themselves and when observing pain in the other person. b = unstandardized coefficient; SE = standard error; β = standardized coefficient, providing a measure of the contribution of each variable to the model;

*p-value = two-tailed.