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Cobern, William W.; Adams, Betty A. J. – International Journal of Assessment Tools in Education, 2020
What follows is a practical guide for establishing the validity of a survey for research purposes. The motivation for providing this guide is our observation that researchers, not necessarily being survey researchers per se, but wanting to use a survey method, lack a concise resource on validity. There is far more to know about surveys and survey…
Descriptors: Surveys, Test Validity, Test Construction, Test Items
Peer reviewed Peer reviewed
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Cobern, William W.; Adams, Betty A. J. – International Journal of Assessment Tools in Education, 2020
Researchers need to know what is an appropriate sample size for interview work, but how does one decide upon an acceptable number of people to interview? This question is not relevant to case study work where one would typically interview every member of a case, or in situations where it is both desirable and feasible to interview all target…
Descriptors: Interviews, Sample Size, Generalization, Qualitative Research