Research Proposal: Assessing Intervention Programmes Aimed at Improving Matric Performance in Serial Underperforming Secondary Schools at UMzinyathi District in KwaZulu-Natal. VALIDITY AND RELIABILITY / TRUSTWORTHINESS In quantitative study: Validity and Reliability For a quantitative study, you need to discuss the principles of Reliability and Validity Discuss the criteria for reliability and validity e.g. construct validity, theoretical validity, concurrent validity, test-retest reliability, inter-rater reliability, etcetera. Demonstrate how you are going to adhere to the criteria for reliability and validity in your study In qualitative study: For a qualitative study, discuss the following criteria of quality: a) credibility (in preference to internal validity); b) transferability (in preference to external validity/generalisability); c) dependability (in preference to reliability); d) confirmability (in preference to objectivity). Discuss how you are going to adhere to the criteria outlined above.