EAS Publisher | Determining the Psychometric Properties of Non-Verbal Intelligence Test (NVIT) Among Pupils Using Classical Test Theory in Rivers State

Determining the Psychometric Properties of Non-Verbal Intelligence Test (NVIT) Among Pupils Using Classical Test Theory in Rivers State

DOI : https://doi.org/10.36349/easjpbs.2021.v03i04.001

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In test development, there is the need for accurate estimation of item difficulty, discrimination and distracter indices of the test especially in the classical test theory. The study adopted instrumentation research design. The sample of the study was 1000 drawn from students in public junior secondary school one in Rivers West Senatorial District, Rivers State. The sample was drawn through multi stage sampling procedure. The instrument for data collection was a 50 item non-verbal intelligence test developed and standardized by the researcher in 2007. The instrument yielded a reliability coefficient of .92 and was determined through the use of Kuder-Richardson estimate21. Results of the study showed that most of the items of the non-verbal intelligence test possessed moderate difficulty index and discrimination index and distracter index. Based on the results, the researcher recommended that there should be more awareness on the development of non-verbal intelligence test and the regular training of test developers on intelligence testing generally and non-verbal intelligence test in particular.

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