Page 39 - Development of Questionnaires for Quantitative Medical Research
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1. To retrieve
                             facts or
                           information





            4. To
          screen for        Four main           2. To
              or             types of         measure
          diagnose a        questionn         knowled
          disease in          aires            ge level
           a subject




                              3. To
                             measure
                              latent
                            variables


         Figure 2.1: Four main types of questionnaires
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