100 Common Mistakes in Scientific Research

1. Choosing an unclear research question.
2. Selecting an inappropriate study design.
3. Weak literature review.
4. Using outdated references only.
5. Failure to identify research gaps.
6. Poor hypothesis formulation.
7. Lack of clear objectives.
8. Conducting research without a protocol.
9. Inadequate planning before starting the study.
10. Ignoring pilot testing.
11. Using an insufficient sample size.
12. Incorrect sample size calculation.
13. Selection bias during recruitment.
14. Nonrepresentative participant selection.
15. Poor inclusion and exclusion criteria.
16. Recruiting participants from only one limited population.
17. High loss to follow-up.
18. Poor participant adherence monitoring.
19. Inadequate randomization.