Before commencing the data collection, the researcher first liaised with the MOH for the approval to
conduct this research. Sample of questionnaire survey was also taken to the MOH’s authorized
government officers for their comments and improvement. The comments were carefully noted and
rephrased. This type of validity is needed in order to ensure the clarity of the question items for the
targeted food handlers’ in the institutions under the MOH’s control. Subsequently, the written approval
letter from the MOH and a personalized letter were attached together with the questionnaire survey.