The Effectiveness Of Using Rating Scale Model In Calibrating Items Of The Big Five Personality Factors Scale On Taiz University Students

Abstract

   The research aims to verify the effectiveness of using the rating Scale Model in the analysis of the big five personality factors on Taiz University students. To achieve the aim of the research, the big five personality factors scale which consists of (60) items was administered to the research sample which consisted of (504) male and female student. The sample was selected from the faculties of Arts, Administrative Sciences, Engineering and Applied Sciences using the stratified random method. The Winsteps program was used to calibrate the responses according to rating scale models, which is one of the item response theory models. The results revealed the effectiveness of rating scale model in calibrating items of the big five personality factors scale since (10, 10, 10, 11, 11) items corresponded with the rating scale model out of 12 items in each of the five factors (neuroticism, extraversion, openness to experience, agreeableness, and Conscientiousness) respectively. Besides, the results revealed that the data of the big five-personality factors scale fulfilled the model assumptions. The rate of person's reliability coefficients for each factor was (0.77, 0.80, 0.80, 0.77 and 0.88) respectively. While the rate of the items reliability coefficients for the five factors was (0.98, 1, 1, 1, 0.99) respectively.