Educational Psychology, School of Education, Moi University,

Kenya. Theses; The effects of item difficulty, item discrimination, and

type of item response theory model on the distributions and effectiveness of

LZ and ECIZ4 Appropriateness Indices.

Educational Measurement, Statistics and Evaluation, University of

Ottawa, Canada. Theses: The effects of item difficulty and examinee

ability on the distributions and effectiveness of LZ and ECIZ4 Person-Fit

Indices.

Bachelor of Education in Double Maths. Kenyatta

University, Kenya.