CLIO Contrasts

As discussed earlier, the CLIO study addressed two key research questions:

1. Is the combination of research‐based, literacy‐focused preschool, parenting, and parent‐child curricula (the CLIO combined curricula) more effective than the existing combination of services in Even Start?
2. Do research‐based parenting and parent‐child curricula (the CLIO parenting curricula) that focus on child literacy add value to the CLIO preschool curricula?

The first research question was addressed analytically by combining projects that received the CLIO combined curricula (study groups 2 and 4 in table ES-1) and comparing their outcomes with those of control projects (study group 5). The study’s second research question was addressed analytically by combining projects that received the CLIO combined curricula (study groups 2 and 4), and comparing their outcomes with those of projects that received the CLIO preschool curricula (study groups 1 and 3).