Title:
ESTIMATING THE EFFECTS OF THE INSTRUMENTATION FACETS AND THEIR INTERACTIONS ON SCORE DEPENDABILITY IN EXAMINATIONS USING GENERALIZABILITY THEORY

Authors:
Nkechi Patricia-Mary Esomonu and James Uzomba Okeaba

Abstract:
This study estimated the effects of instrumentation facets and their interactions on score dependability in examinations, using the Generalizability Theory. With students’ low performance in mathematics examinations, it is needful to estimate the effects of the instrumentation facets and their interaction on score dependability using generalizability theory. Three research questions and two hypotheses were posed to guide the study. The study population comprised 5,085 SS3 students of the 34 Governmentowned senior secondary schools in Yenagoa LGA of Bayelsa State. Section A of the 2019 NECO Mathematics main paper and 2019 NECO Mathematics Marking Scheme were used to collect the data. EduG version 6.0-e based on ANOVA and Generalizability theory was used to answer the threes research questions. A 95% confidence interval was computed using the S E variance components to determine whether there was a significant difference in the instrumentation facets’ effects and their interactions to measurement error and score dependability in examinations. The study’s findings revealed that the facet items contributed about 18.5% of the measurement error while the facet makers had 0% effect on the score dependability. Items and markers were not significantly different in their contributions to score dependability and an index of dependability of 0.93 that is high enough to maximize reliability was obtained when we have level of markers at 2 and the items at 10.

Keywords:
Generalizability theory, instrumentation facets, dependability, students, Yenagoa,

DOI:
http://dx.doi.org/10.37500/IJESSR.2021.4226