%0 Journal Article
%T Comparing Psychometric Properties of Lower Asymptote Three-Parameter Logistic model (3PL), Upper asymptote 3PLu model and both asymptotes (4PL) based on University Entrance Exam Data
%J Journal of Modern Psychological Researches
%I University of Tabriz
%Z 2717-3852
%A Mohammadloo, Javaad
%A Izanlou, Belal
%D 2020
%\ 06/20/2020
%V 15
%N 57
%P 50-66
%! Comparing Psychometric Properties of Lower Asymptote Three-Parameter Logistic model (3PL), Upper asymptote 3PLu model and both asymptotes (4PL) based on University Entrance Exam Data
%K Item response theory؛ 4PL Model؛ 3PL model
%K lower asymptote
%K upper asymtote
%R
%X The purpose of present study is to compare Psychometric properties of lower asymptote (3PL), upper asymptote (3PLu) and four-Parameterl (4PL) with lower and upper asymptote Logistic models. 3PL model is obtained by adding lower asymptote to 2PL model, and 4PL model is obtionaed by adding upper asymptote to the 3PL, with removing lower asymptote from 4PL, 3PLu is obtained. In order to campare mothels, Data from University Entrance Exam 1394 (2015), is used for analysis (mathematics-physics science, empirical sciences , humanity science groups). A random sample of 6000 selected and analyzied. The mirt package in R software was used for items analysis. .fitting In test level, the DIC index showed that, except chemistry, in other tests, the 3PL model was more appropriate than the 4PL model. Results based on Bayes factor (BF) index in general are consistent with the DIC index results. The correlation between raw and estimated ability scores of all five models is high, and the estimated ability by models was not significantly different. At high levels of ability the information of 3PL model is more informative than 4PL model. Generally, the 4PL does not show a specific advantage over the 3PL, unless for items have better fit to the 4PL. Of course, the effect of sample size on these results is not clear, and it is necessary this results to be compared according to the sample size in future research.
%U https://psychologyj.tabrizu.ac.ir/article_10875_2956c56bbf1ca7f2619bc4f37958fe97.pdf