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August 2008
Item Analysis of C, D and E Series from Raven’s Standard Progressive Matrices with Item Response Theory Two-Parameter Logistic Model
The present report is focused on the Item Response Theory research methodology and descriptive potential. Its purpose is to present the item analysis of C, D and E Series from Raven’s Standard Progressive Matrices which were given to 506 Bulgarian high school students. The basic concepts and underlying assumptions of IRT are briefly reviewed. The latent variable is defined after a short check of some intelligence theories and a detailed examination of the used items. After the verification of IRT assumptions, the Two-parameter logistic model is selected for the analysis. The estimated item parameters are interpreted in accordance to suggested guidelines. Item Characteristic Curves and Item Information Functions are plotted and their features are also discussed. (more...)Posted on August 2008
August 2008
Workaholism types among Turkish physicians: Potential antecedents and consequences
This study examined potential antecedents and consequences of workaholism types among 431 male and female physicians in Turkey. Three workaholism types (Work Enthusiasts, Work Addicts, Enthusiastic Addicts) and one non-workaholic type (Unengaged workers) previously identified by Spence and Robbins (1992) were compared. Antecedents included personal and work situation characteristics and personality factors; consequences included work experiences, work outcomes and indicators of psychological well-being. (more...)Posted on August 2008
August 2008
Depression and body image disturbances among females seeking treatment for obesity in Saudi Arabia
Obesity is an increasingly prevalent disease around the world and is becoming one of the main public health problems in developed countries. The relationship between obesity and psychological distress continued to be debated by researchers and clinicians. This study aimed to assess depression and body image disturbances in obese patients seeking treatment for obesity. (more...)Posted on August 2008