Can be used to assess whether a child is developing at a rate comparable with that of other children of the same age and gender.

Which research model refers to the study of an individual, group, or community over a predetermined period? a. cross-sectional model b. sectional model c. cross-sequential model d. longitudinal model

Restricting immigrants from entering a country may be based on what belief?  

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?