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Background: Study of personality can help to explanation of pathology in mental disorders. The aim of this study was to examine major depressive disorder (MDD) based on revised- reinforcement sensitivity theory (r-RST). Materials and Methods: Forty-five patients with MDD along with 45 healthy individuals as a control group participated in the present study. Following the informed consent form, Structured Clinical Interview (SCID-I), General Intelligence Test (SGIT), Jackson's 5-factor questionnaire for assessing personality, and Beck Depression Inventory (BDI-II) were administered to the two groups. Data were analyzed using Chi-square, independent t-test, analyses of variance (ANOVA), and multiple analyses of variance (MANOVA). Results: MANOVA results showed a significant difference between MDD and control groups in the items of Jackson's 5-items questionnaire. The MDD group score in r-BAS (P

Background: Rheumatoid arthritis (RA) is an inflammatory disease involving small and large joints. In addition to physical problems and physical disabilities, this disease has social and psychological consequences such as depression, anxiety and lack of a purposeful life. This study aimed to compare the emotional components, chronic fatigue and sleep quality in healthy individuals and patients with rheumatoid arthritis. Materials and Methods: In this case-control study, 40 patients with rheumatoid arthritis referred to the office of rheumatologists in Kashan and 40 healthy individuals were purposefully selected. The research instruments included the Anxiety, Stress, Depression (Depression Anxiety Stress Scale), Chronic Fatigue Scale and Pittsburg Sleep quality index questionnaires. Data analysis was performed using SPSS software version 22 with Mann-Whitney U test and independent t-test. Results: The results showed that the level of emotional components and chronic fatigue in the rheumatoid arthritis group was significantly higher than the healthy group (P