Ogunka, Richard Iheanyichukwu and Goodness Orluwene 2019. Application of generalizability theory in estimation of variance components in National Examination Council essay questions in English Language. The African Journal of Behavioural and Scale Development Research. 1, 2 (Aug. 2019). DOI:https://doi.org/10.58579/ajbsdr.v1i2.24.