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Table 4 Criteria used to develop items for complementary medicine questionnaires 1

From: Development of the adult and child complementary medicine questionnaires fielded on the National Health Interview Survey

1 Literacy level of questions at 8th grade or below  
2. Specific questions are generally easier to answer than broad ones 8. Questions covering multiple concepts are decomposed into single questions
3. Question captures what researcher intended (i.e. every respondent answering the same question) 9. Questions are designed to avoid social desirability effects
4. Question interpreted as intended by persons in a range of socio-demographic groups 10. Avoid:
   a. questions worded in the negative
5. Response categories fit the question and are non-overlapping, clear and unambiguous    b. complex questions
   c. questions combining two items in one (double barreled)
6. Reference periods are clear and match respondent’s ability to recall    d. jargon
   e. ambiguous terms
7. Terms and definitions are defined    f. questions that lead respondents toward a particular answer
  1. 1This criteria were identified from the literature: References [4244].