1. Sample size greater than 500, and not limited to a specific group by design (e.g., only children of a specific race, poverty level, or program) |
2. Measured 1 or more of the predictors of early school success among children prior to school entry |
3. Longitudinal studies with initial assessment prior to school entry and with follow-up at least 6 months later |
4. Follow-up at age 54 months (4.5 years) or beyond |
5. Assessment of cognitive capacity or academic achievement at a follow-up |
6. Articles published during or after 1980. |