Sample interview questions: How do you ensure the reliability and validity of educational questionnaires in your research?
Sample answer:
Reliability
- Test-retest reliability: Administer the questionnaire to the same participants at two different time points and compare the results. Consistency between scores indicates reliability.
- Internal consistency reliability: Measure the consistency of responses within the questionnaire using measures such as Cronbach’s alpha or Guttman split-half reliability. High values (>0.7) suggest good internal consistency.
- Inter-rater reliability: If multiple researchers are involved, have them independently rate or score the questionnaire responses. Agreement between raters supports reliability.
Validity
- Content validity: Ensure that the questionnaire items adequately represent the intended constructs being measured. Obtain feedback from experts in the field.
- Criterion validity: Compare questionnaire scores to an established measure of the same construct. If the scores correlate highly, the questionnaire has criterion validity.
- Construct validity: Conduct factor analysis or other statistical methods to determine whether the questionnaire items load onto the hypoth… Read full answer
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