Chained Equipercentile Equating of Senior School Certificate Multiple-Choice Test Items in Chemistry

Abstract

This study investigated chained equipercentile equating of Senior School Certificate Multiple Choice Test Items in Chemistry conducted by the West African Examinations Council (WAEC), the National Examinations Council (NECO) and National Business and Technical Examination Board (NABTEB). The study adopted the Non-Equivalent Groups Anchor Test design. A sample of 1,461 students was selected among Senior Secondary III students in the southwest geopolitical zone of Nigeria using a multi-stage sampling procedure. The 2017 WAEC, NECO and NABTEB SSCE multiple choice Chemistry papers were used as instruments for data collection.  The WAEC, NECO and NABTEB papers yielded coefficients of content validity of 0.78, 0.75, and 0.76 and reliability of 0.81, 0.77, and 0.78 respectively. Data obtained were analysed using mean and percentile rank.