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

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.