أثر اختلاف عدد نقاط تدريج الاستجابة لليكرت في الخصائص السيكومترية للمقاييس النفسية : مقياس الفعالية الذاتية نموذجا

الملخص EN

The study aimed to verify the impact of the number of response points to the Likert scale on the psychometric properties of psychological measures.

The researcher relied on the Self-efficacy scale as a model.

The study randomly sampled was chosen from students of the College of Educational Sciences at Imam Muhammad ibn Saud Islamic University, Department of Psychology, all the four study levels.

The study relied on the use of confirmatory factor analysis to estimate the construct validity to differentiate the difference between the different models best fitted.

The internal consistency stability was estimated by using Cronbach's alpha coefficient for each construct.

The results were in favor of the four-response model as the first section, then five-response, then triple, and then six-response model.

The seven-Likert point model was a poorly fitted one.

The study recommends relying on psychological tests and measures consisting of a four or six response grading in the case of scale whose psychological and emotional characteristics are affected by the type of the unbiased response, then, It is preferable to exclude any rejection response that is influenced by social acceptability.

The study also confirms the use of five-response grading because of its statistical robustness.