4/30/2023 0 Comments Inter rater reliability psychology![]() The results of the CTT study show that Kappa and Krippendorff alpha statistical techniques failed to provide information about the sources of the errors causing incompatibility in the criteria. Raters used an analytical rubric developed by the International Baccalaureate Organization (IBO) as a scoring tool. In this descriptive research data consists of twenty individual investigation performance reports prepared by the learners of the International Baccalaureate Diploma Programme (IBDP) and also five raters who rated these reports. The Kappa and Krippendorff alpha techniques based on CTT were used to determine the inter-rater reliability. The aim of this study is to analyse the importance of the number of raters and compare the results obtained by techniques based on Classical Test Theory (CTT) and Generalizability (G) Theory.
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