A practical application of research in public policy involves decisions on funding early intervention programs for disadvantaged children. A policymaker, such as a state governor, must determine if these programs are effective before allocating taxpayer funds. Extensive research by psychologists and other scientists has shown that while effectiveness varies, these programs are generally beneficial and can produce positive long-term outcomes. By examining this research, a leader can make an informed decision, identifying and funding the specific programs that are most effective and yield the best results.