Abdalla, A.M. and Ahmed, O.I. 2022. The usage of psychometric equations in processing of master and doctoral theses in the Sudanese universities in the Khartoum – the capital, during (2015- 2020). Journal of Educational and Psychological Sciences. 6, 1 (Jan. 2022), 122–140. DOI:https://doi.org/10.26389/AJSRP.R220621.