Professor sanchez is interested in studying development of motor skills. she collects data from 200 one-year-olds and follows and assesses them for a period of five years. what type of research design is professor sanchez using? a. cohortb. longitudinalc. correlationald. cross-sectional

The anwer is B. Longitudinal.

Explanation:

Longitudinal research is carried under the same conditions, over the same subjects over different periods of time. It's especially useful for examining behavioral data. However, the most significant disadvantage is that they are time-consuming and might be expensive. Moreover, the subjects might not even continue participating in the research.

we need a diagram to you sorry

answer; i believe the correct answer is (federalist);