In order to combine words into grammatically sensible sentences, one needs to adhere to proper rules of:

As a result of reading several research articles on the long-term effects of daycare, a state legislature passes a new law mandating that all daycare providers modify their practices to be in consistent with this research. This action reflects a. how research can affect social policy

b. the benefits of doing meta-analytic research. c. the importance of longitudinal studies. d. why correlational research is superior in some ways to experimental research.

In which research design are age differences and cohort differences hopelessly tangled?

a. Cross-cultural b. Cross-sectional c. Longitudinal d. Sequential