![]() The reliability of the instrument is measured using internal consistence reliability, which is measured by alpha coefficient reliability or Cronbach Alpha. The content validity is assessed by the experts and the construct validity is measured by Exploratory Factor Analysis (EFA). The instrument in the form of questionnaire is distributed to a sample of 120 primary and secondary school teachers. The instrument is developed based on a conceptual framework developed by Daniel Stufflebeam, that is the CIPP (context, input, process and product) Evaluation Model. The aim of this study is to develop and assess the validity and reliability of an instrument to measure the perception of teachers towards the SBA implementation in schools. ![]() A valid, reliable and practical instrument is needed to evaluate the implementation of the school-based assessment (SBA) system.
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