ISSN: 2226-6348
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Various criticisms have been leveled against psychological testing. A large proportion of the criticism pivots on fairness of test to the various identifiable groups taking the same test. This article discusses the meaning, types and sources of test item bias as well as different methods of detecting it in a testing situation. One of the implications of test item bias in Nigerian educational system is that it blurs the essence of testing which is to reveal the latent ability of examinees. Test item bias also affects the vital psychometric properties of measurement results in terms of validity and reliability. It is recommended that examination bodies should construct test items in such a manner that items are free from writing errors such as wordiness, irrelevancy, offensiveness, and excessive stimulations, so that when an inadequacy exists between groups’ examination scores, the disparity will be attributed to true differences in whatever the test purports to measure in the examinees. The paper emphasizes that educators should take more cognizance of the possibility of test item bias in a testing situation and with this kind of effort, candidates from educationally disadvantaged areas and low socio-economic status would be certain to be fairly treated.
Anastasia, A., & Urbina, S. (2006). Psychological testing. New Delhi: Prentice Hall
Berk. (2007). Item Bias detection methods for small samples. Dissertation abstract international.
Camilli, G., & Shepard, L. A. (2009). Methods for identifying biased test items. (Vol. 4) Thousand Oaks, CA: Sage Publications.
Clauser, B. E., & Mazor, K. M. (2008). Using statistical procedures to identify differential item functioning test items. Educational Measurement: Issues and Practice, 17, 31-44.
Dibu-Ojerinde, O. O. (2006). Test item bias and implication for testing in Nigeria. Nigerian Journal of Guidance and Counseling, 3 (1-2), 108-116.
Emaikwu, S. O. (2011). Evaluation of student’s ability in schools. Being a paper presented at a workshop on teaching practice on Friday, 29th July in the College of Agricultural & Science Education, Federal University of Agriculture Makurdi, Benue State
Hambleton, R. K., & Cook, L. (2005). Latent trait models and their use in analysis of educational test data. Journal of Educational Measurement, 14 (3), 75-96
Joshua, M. T. (2005). Test/item bias in psychological testing: Evidence in Nigerian system. A paper presented at the annual conference of Nigerian Association of Educational Psychologists held at Ahmadu Bello University Zaria from 24th -28th March.
Lord, F. M. (2002). Applications of item response theory to practical testing problems. Hillsdale, New Jessey: Erbaum press.
Lumsden, R.T. (2003). Sampling from a matrix with application to the theory of testing. Princeton University: Statistical research group report no.53
Nunnally, R. S. (2008). Using the Rasch approach to measurement in solving practical school testing problems. Journal of Educational Measurement, 13 (4), 116 – 124
Pine S. M. (2006). Applications of item response theory to the problem of test bias. Research report of the Department of psychology, University of Minnesota.
Swaminathan, H., & Rogers, H. J. (2005). Detecting differential item functioning using logistic regression procedures. Journal of Educational Measurement, 2 (7), 361-370.
Zumbo, B. D. (2009). A Handbook on the theory and methods of differential item functioning (DIF):Scores. Ottawa, ON: Directorate of Human Resources Research and Evaluation, Department of National Defense.
In-Text Citation: (Emaikwu, 2012)
To Cite this Article: Emaikwu, S. O. (2012). Issues in Test Item Bias in Public Examinations in Nigeria and Implications for Testing. International Journal of Academic Research in Progressive Education and Development, 1(1), 172–184.
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