

- Examples of Research Designs
This site by Dr. Jeff Oescher offers some examples of experimental and non-experimental research designs.
- Design
This site is Trochims research design section of the extensive website at Cornell. It has hyperlinks to information on internal validity, types of designs, experimental design, quasi-experimental design, pre-post designs, and other related topics.
- Advances in Quasi-Experimental Design
This is an interesting look at quasi-experimental designs.
- Threats to Validity
An outline and explanation that includes headings such as: threats to internal validity, threats to external validity, and fundamental concepts of validity.
- Basics of Experimental Design
This non-technical guide discusses many terms and definitions related to experimental designs.
- Experimental Research Methods
Notes explaining experimental research methods. Use arrows to advance through notes.
- Research Methods Glossary
The definition of experimental research and many other related terms.
- Research Design
Another Trochim site on experimental research design.
- Experimental Design
A slide show defining experimental design.
- Single Subject Research Design
A single?subject research design worksheet in an outline format that walks you through the steps of single?subject research.
- Research Designs
A site that lists characteristics of pre-experimental designs, true experimental designs, quasi?experimental designs, and others.
- Securing Internal Validity
This is part of Trochims website discussing internal validity.
- Experimental Design Internal Validity
A tutorial on threats to internal validity with links to the nine threats.
- Single Group Threats to Internal Validity
A Trochim site titled focused on single group threats to internal validity.
- External Validity
A Trochim site discussing external validity.
- True and Quasi Experimental Design
This site includes a discussion on true and quasi?experimental designs. It discusses limitations,
recommendations for evaluation, and additional readings.
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