@nursing_research

1. Types of Research Design
By- Salman khan

2. Introduction
• There is lack of consensus on the uniform
classification of research designs.
• The following discussion presents the most
practical and simplified classification, which is
practiced by most of the prestigious research
institutions and eminent research scholars.

3. Types of Research Design
• Generally, research designs are classified into
three broad categories and several subtypes:
1. Quantitative Research Design
2. Qualitative Research Design
3. Mixed (Triangulation) Method

4. 1. Quantitative Research Design
A. Experimental Research Designs
B. Non experimental/ Observational Research
Designs
C. Specific Quantitative research designs

5. A. Experimental Research Designs
i. True experimental design
ii. Quasi Experimental design

6. i. True experimental design/
Randomized controlled trial
a) Basic true experimental designs
b) Specific true experimental designs

7. a) Basic true experimental designs
• Post test only control design
• Pre test post test control group design
• Solomon four group design

8. b) Specific true experimental designs
• Parallel group design
• Split body design
• Factorial design
• Randomized block design
• Crossover design
• Latin square design

9. ii) Quasi Experimental design
• Non randomized control group design
• Non equivalent control group post test only
design
• Time series non equivalent control group design
• Time series design
• Time series with withdrawn re-instituted
treatment design
• One group pretest post test design

10. B. Non experimental/ Observational
Research Designs
i. Correlational research design
ii. Descriptive research design
iii. Exploratory research design
iv. Survey research design

11. i Correlational research design
a) Cohort research design
b) Case control research design
c) Analytical cross-sectional design

12. a) Cohort research design
• Prospective cohort research design
• Historical cohort research design
• Ambispective cohort research design

13. b) Case control research design
• Nested case control research design
c) Analytical cross-sectional design

14. ii) Descriptive research design
a) Univariate descriptive design
b) Comparative descriptive design

15. a) Univariate descriptive design
• Prevalence studies/ Cross sectional descriptive
design
• Incidence studies/ longitudinal descriptive
design

16. C. Specific quantitative research
designs
• Clinical trials
• Evaluation research
• Outcome research
• Operational research
• Methodological research
• Secondary data analysis
• Meta analysis
• Ecological studies

17. 2. Qualitative Research Design
• Phenomenological research
• Ethnographic research
• Grounded theory
• Case study
• Historical research
• Action research

18. 3. Mixed (Triangulation) Method
• Convergent design
• Exploratory sequential design
• Extended design