Longitudinal study vs Case study

what’s the difference between a case study and a longitudinal study since both seem to be done over a long period of time? also can you explain what a cross sectional study is?

A case study is a single individual or at least a very exclusive population, and is therefore not generalizable. A longitudinal study is a larger sample size that aims to be generalized.

A case study is a study of only one individual or event, usually rare (like a child who has a hemispherectomy). A longitudinal study examines a group of people over a long period of time. I am thinking that you can point out that there is some overlap, as long as you demonstrate that you understand that cases are studies of single events while longitudinal is a term that refers to the length of time and not the number of people being studied.

Cross-sectional research involves using different groups of people who differ in the variable of interest but share other characteristics, such as socioeconomic status, educational background, and ethnicity. Cross-sectional research studies are often used by researchers studying developmental psychology.

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