Item Discrimination of Intelligence Test Items: A Quality Assurance Test for an Assessment Tool

Abstract

Item discrimination is an essential technique for making the item analysis for selecting the appropriate items for intelligence test. It helps to identify items which can be revised or discarded, thus building a quality items for IQ assessment tool. The study focussed on item analysis of 100 items of four intelligence types. These items of intelligence test conduct on 1500 people of different age groups adolescence to adulthood. Through item discrimination explored the items discriminatory power with the help of MS excel 2010 and SPSS. Through item analysis we rejected 23 items which item discriminatory power was zero, negative and less than 0.5. item discrimination range in present study was 0.5 -0.45. reliabilities of all types of the intelligence likewise linguistic, observational, mathematical and logical were .88, .80, .89 and .90 respectively. These reliabilities were higher and indicating the present tool of intelligence authentic and reliable. This is a quality assurance test for measuring the individuals intellectual capabilities.