Despite its advantages, longitudinal research also faces several challenges:
Attrition: The loss of participants over time can lead to attrition bias, which may affect the validity of the findings. Time and Cost: Longitudinal studies often require significant time and financial resources to follow participants over extended periods. Complex Data Management: Handling and analyzing longitudinal data can be complex and requires specialized statistical techniques. Ethical Considerations: Maintaining participant confidentiality and obtaining informed consent for extended periods can be challenging.
