Semipartial correlations indicating the unique variance predicted by each variable in the full hierarchical regression model.

* p ≤ 0.05** p ≤ 0.01*** p ≤ 0.001^ When the two “extreme altruist” outliers were included in the Helping Game regression, the relationship between empathic concern and helping behavior became non-significant (Empathic Concern Δ R2 = 0.016, p = 0.12).Trait empathic concern (the emotional component of compassion) predicts unique variance in both the Helping Game and within Punishers (spend > $0) in the Punishment Game.