Table 1 Summary of hierarchical multiple regression analysis with percent of trials with food transfer as criterion (N = 96).

From: Altruistic food sharing behavior by human infants after a hunger manipulation

Regression stepPredictor variablebSEtΔR2P
Step 1Group29.696.254.750.190.000007
Step 2   2.540.100.002
 Siblings13.836.182.24 0.028
 Ethnic-cultural background30.7710.213.02 0.003