DOI: 10.36347/sjpms.2021.v08i09.002

Pages: 171-178

This study focused on the application of generalizability theory to estimate the dependability of Dorathy’s Critical Thinking Scale (DCTS) for university students in the South-South Geo-Political Zone of Nigeria. Three research questions guided the study. A G-study design was used for the study. A stratified proportionate random sampling technique was used to draw a sample size of 1,041 participants from the population. The reliability coefficient realized from the pilot study was 0.86. Research question one was answered using ANOVA by variance component, research question two was answered using relative and absolute errors, while research question three was answered using dependability coefficient. The result showed that the DCTS has a good variance component. For items it was .003 with 1.42%, occasion revealed .007 with 3.30% while the error was 0.202 with 95.3%. The relative and absolute errors were 0.0014 and 0.0111. The dependability coefficient for DCTS was 0.63. Recommendations were made including that stakeholders in the universities should imbibe evaluating students with the use of critical thinking because it is dependable. Also, G-theory should be used to determine the reliability of the instrument as it would result in multiple sources of variations.