KakaoKTT: Set of SPSS macros for item analysis - classical test theory

Abstract

A set of newly developed computer programs called Kakao are presented in this paper. The set of programs is intended for the item analysis of instruments in the field of behavioral sciences. The programs are developed in Matrix program language as macros for statistical package SPSS for Windows. These macros are open source programs, which are free and very simple to use. They can run only within SPSS statistical package. KakaoKTT is designed for the item analysis based on the Classical Test Theory and its supportive models. It contains a selection of measuring characteristics of items and their respective tests, along with a short description of each presented coefficient. Besides classical indicators of measuring characteristics, there are a number of indicators based on Guttman's measurement model. KakaoKTT accepts dichotomous and polychotomous items scored in the same direction.