Browsing by Author "Odewabi, Oyedele Sunmoye"

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    Relationship between test item parameters and options length in 2015 Neco Chemistry multiple choice items among secondary school students in Osun State
    (Department of Educational Foundations and Counseling, Faculty of Education, Obafemi Awolowo University., 2024) Odewabi, Oyedele Sunmoye
    This study determined the difficulty indices of three-option, four-option and five option multiple choice 2015 National Examination Council (NECO) Chemistry items. It calculated the discrimination indices of the three variants of multiple choice 2015 National Examination Council (NECO) Chemistry items. It further estimated the guessing parameter of the three types of multiple choice 2015 National Examination Council Chemistry items; and finally determined the relationship between options length and difficulty indices. This was with a view to establishing the relationship between Test Items Parameters with respect to option Length in 2015 NECO Chemistry multiple choice items. The study adopted the descriptive survey research design. The population comprised Senior Secondary School (SSS III) Students who registered and sat for National Examinations Council Chemistry Examination Paper III in 2023 among the three Local Governments selected from each Senatorial District (SD), 36 secondary school were selected from 1,432 secondary schools in Osun State. A sample of 931 Students of SSS III Chemistry intact classes in all selected schools in the three Senatorial Districts (SDs) of Osun State was used, employing multi-stage sampling procedure. Research instrument that was used for the study were the Chemistry Achievement Test (CAT) and answer sheet Optical Mark Reader (OMR). The instrument was developed by subject experts in NECO, as such the validity of the instrument was assumed. Pilot-test was done using 30 respondents that were not within the selected sample but have similar characteristics. The results obtained showed that the three options multiple-choice, four option multiple-choice and five option multiple-choice test items have a Kuder-Richardson Reliability estimates of 0.76, 0.70 and 0.73 respectively. With the three option version of the Chemistry test significantly more difficult than the five option version of the tests (mean difference = 1.69, p < 0.05). Similarly, the four option version of the Chemistry test was significantly more difficult than the five option version of the test (mean difference = 1.82, p < 0.05). The discrimination parameters of the test versions were found not to be statistically significant (F (1.048, 61.849) = 0.353, P > 0.05). The results also showed that the three option version of the 2015 NECO Chemistry test was significantly more vulnerable to guessing than the four and five option versions of the test (mean difference = 0.05, P < 0.05; mean difference = 0.20, P < 0.05 respectively). The results also showed that the four option version of the 2015 NECO Chemistry test was significantly more vulnerable (mean difference = 0.15, P < 0.05) to guessing than the five option version of the test. The relationship between difficulty indices and the length of the options were significantly high (r = -0.51, p < 0.05). The study concluded that the relationship between Test Items Parameters and option length of 2015 National Examination Council Chemistry multiple choice items adequately revealed the extent to which the items were difficult, and the extent to which they discriminated and vulnerability to guessing among the students.