“…The Early Head Start evaluation, for example, found that parenting and social-emotional developmental outcomes were strongest for Black children and that families experiencing three risk factors (e.g., single parenthood, receiving public assistance, teen parenthood) showed stronger effects than families with either fewer or more risk factors (Love et al, 2002). Within the early intervention literature, stronger results have also been reported for more intensive programs measured as hours of contact, part-day versus full-day, total years of intervention, and extent of compliance with program standards (Campbell & Carmey, 1994;DeSiato, 2004;Love et al, 2002;Ramey et al, 1992;Reynolds et al, 2001). For these reasons, we examined differential pre-K effects by family income (using free lunch eligibility as a proxy for family income) and racial-ethnic group of the children and by their enrollment in half-or full-day programs.…”