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Gribbons, Barry; Herman, Joan – 1997
Among the different types of experimental design are two general categories: true experimental designs and quasi- experimental designs. True experimental designs include more than one purposively created group, common measured outcomes, and random assignment. Quasi-experimental designs are commonly used when random assignment is not practical or…
Descriptors: Comparative Analysis, Control Groups, Evaluation Methods, Evaluation Utilization
Helberg, Clay – 1996
Abuses and misuses of statistics are frequent. This digest attempts to warn against these in three broad classes of pitfalls: sources of bias, errors of methodology, and misinterpretation of results. Sources of bias are conditions or circumstances that affect the external validity of statistical results. In order for a researcher to make…
Descriptors: Causal Models, Comparative Analysis, Data Analysis, Error of Measurement
Dzierlenga, Donna; Friedlander, Jack – 1981
Practical information is provided, in a question and answer format, for community college officials who are planning to conduct a community needs assessment. A brief discussion of the usefulness of needs assessment surveys to the college planning process is followed by descriptions of eight steps to be followed in planning and conducting a survey:…
Descriptors: Bias, Community Colleges, Community Needs, Community Study