What is Longitudinal research? research methodology

What is Longitudinal research?

In longitudinal research, researchers examine the features of a unit at more than one time.

longitudinal research
Figure: Longitudinal research

What are examples of Longitudinal research?

Different computer parts are observed at different time to measure the computer speed(as shown in figure 1).

What are advantages of Longitudinal research?

  • More powerful as compared to cross sectional research.

What are advantages of Longitudinal research?

  • Much more  time-consuming
  • Much more expensive than cross-sectional

What are three types of Longitudinal research?

  • Cohort
  • Panel
  • Time Series

What is time series research?

It is longitudinal research. In time series research same type of data and information is gathered on a group of units or people across different and multiple time periods.

What is example of  time series research?

  • Teacher and course evaluation in a university. Evaluation is done for each subject and for each teacher in the end of each semester. one course is evaluated multiple time in different years.
  • A university result ration is measured each year

What is panel study?

It is longitudinal research. In panel study, researchers observes exactly the same unit, people or group across multiple and different time periods. It is difficult to carry out because some people leave or die. Exact same people are not always available for a researcher.

What is cohort analysis?

It is longitudinal research. Cohort analysis is similar to panel study but there is a some difference that the exact same people or units having the same behaviour or life experience are observed.

What is example of cohort analysis?

  • All students got the admission in same year.
  • All employee hired in the same month.