Validity & reliability of the research instrument

Speaker: Prof Dr Mohd Sahandri Gani Hamzah from UPM
Date: 20 June 2009
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Warwick and Linninger (1975) '2 basic goals in questionnaire design

1. to obtain info relevant to the purposes of the survey.
   
2. to collect this info with maximal reliability and validity.

- Validity involves the accuracy of the instrument.
- send to expert for approval (at least 5) and need to carry pilot study to test the reliability of the instrument.

3 basic approaches (Mason & Bramble, 1989)
- content validity
- construct validity
- criterion-related validity