Your Cart

Your cart is empty

Home  >  Transactions of NAMP VOL 6

34. Unidimensionality and local independence assumptions of item response theory of the WAEC and NECO standardised Mathematics tests by P. O. Olonade a and J. G. Adewale Transactions Vol. 6 (Jan., 2018), pp. 344 - 354
Sale price: $5.00
Quantity:

Unidimensionality and local independence assumptions of item response theory of the WAEC and NECO standardised Mathematics tests

P. O. Olonade a and J. G. Adewaleb

a,bInternational Centre for Educational Evaluation, Institute of Education, University of Ibadan, Ibadan, Nigeria

Abstract. This study investigated the assumptions of Item Response Theory (IRT) in the standardised mathematics tests of Senior School Certificate Examination (SSCE) of the WAEC and the NECO in Lagos State using factor analysis and polychoric correlation methods. The 50-item 2014 SSCE Standardised Multiple Choice Mathematics Tests from each of WAEC and NECO were administered on two thousand, one hundred and forty nine (2,149) students randomly selected from 48 schools in Lagos State, Nigeria. The responses of the students were analysed using factor analysis, polychoric correlation. Results showed that the 50-item each of WAEC and NECO 2014 SSCE measure students‟ mathematics ability establishing unidimensionality of the tests; none of the items provided clue for answering another item establishing local independence of the test items. Therefore, unidimensionality and local independence assumptions should be obeyed in assessment that uses IRT.

Keywords: Item response theory, unidimensionality, local independence, standardised Mathematics tests

Close
Loading...