Answer:
Cross-sectional
Explanation:
Cross-sectional studies: The cross-sectional studies are defined as the involvement of various groups of people who shares few characteristics but differ in the variable of interest in the study. It can be used in developmental psychology.
For example: educational background, socioeconomic status, religion, ethnicity, etc.
The cross-sectional studies are cost-effective and time-saving. it takes relatively lesser time as compared to the longitudinal studies.
