- Research Design
This site is Trochim's research design section. It has links to information on several types of designs (e.g., experimental, quasi-experimental, etc.), internal validity, and several other related topics.
- Designing Designs for Research
This is an excellent discussion of the issues related to developing research designs, particularly those known as experimental designs.
- The Basics of Experimental Design
This is a non-technical guide to issues related to experimental designs.
- Introduction to Validity
This is an excellent discussion of the concepts related to experimental validity in research.
- Internal Validity
This is Trochim's discussion of construct validity.
- Threats to Construct Validity
This is Trochim's discussion of the threats to construct validity.
- External Validity
This is the section in Trochim's site that relates to external validity and threats to it.
- ERIC Digest - True and Quasi-Experimental Designs
This is an excellent resource on true and quasi-experimental designs. It discusses the limitations, recommendations for evaluation, and additional resources.
- Quasi-Experimental Design
This is Trochim's discussion of many issues related to quasi-experimental design. It contains links to many other pages related to specific quasi-experimental designs.
- Two-Group Experimental Designs
This is Trochim's discussion of basic experimental designs. It contains several valuable links to other pages that discuss specific designs or issues related to them.
- Journal of the Experimental Analysis of Behavior
This is a research journal focused on single subject research.
