The purpose of the evaluation study is to rigorously evaluate the impact of MOCEP on child and parent outcomes among Palestinian refugees in Beirut, Lebanon. This evaluation employs an innovative, mixed-methods bio-behavioral approach to investigate the associations among social contexts; maternal, child and family functioning; and reduction in violence through the promotion of harmonious family relationships. The results of this study have implications for improving the lives of and reducing violence for the hundreds of thousands of families with young children living in fragile contexts. We hypothesize that when MOCEP is implemented with fidelity (i.e., delivered as intended by design), participating families will experience reduced violence in their homes and have better individual and intra-family outcomes than families who do not participate in the program.