Methods of validating a test instrument

The use of reliability types (test-retest, split half, alternate form, internal consistency) depends on the nature of data (nominal, ordinal, interval/ratio). For example, to assess reliability of questions measured on an interval/ratio scale, internal consistency is appropriate to use. Following these five steps in questionnaire development and testing will enhance data quality and utilization of research.

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Each step depends on fine tuning and testing of previous steps that must be completed before the next step.

Approval from the Institutional Review Board (IRB) must also be obtained.

Following IRB approval, the next step is to conduct a field test using subjects not included in the sample. An analysis of research designs used in agricultural and extension education.

Good preparation and understanding of Step1 provides the foundation for initiating Step 2.

After developing a thorough understanding of the research, the next step is to generate statements/questions for the questionnaire.

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