درخت حوزه‌های تخصصی

The purpose of the research is to analyze the effects of ethical leadership and organizational politics on individual and team creativity, focusing on the mediating role of knowledge hiding. The study is a descriptive-correlational survey and is applied in terms of purpose. The statistical population included employees of selected public organizations in the Eqlid County, totaling 950 individuals. 270 individuals were selected using a non-probability convenience sampling method based on the rule of thumb for SEM as the sample. To collect data, the following measures were used: Brown's et al. (2005) Ethical Leadership scale, the Organizational Politics scale by Kacmar and Carlson (1997), the Knowledge Hiding scale by Serenko and Bontis (2016), the Individual Creativity scale by Zhou and George (2001), and the Hanke's (2006) Team Creativity scale. The validity of scales was confirmed using the content validity, and the reliability was examined using Cronbach's alpha, yielding values of 0.89 for the Ethical Leadership, 0.82 for the Organizational Politics, 0.92 for the Knowledge Hiding, 0.87 for the Individual Creativity, and 0.85 for the Team Creativity. For data analysis, SEM and the AMOS software were used. The results of the study fitted the research model, indicating that ethical leadership and organizational politics have a significant negative impact on knowledge hiding. Additionally, knowledge hiding has a significant negative effect on both individual and team creativity of employees. By reducing knowledge hiding behaviors through ethical leadership and organizational politics, the level of creativity among employees at both individual and team levels increases.

 Objective: Being overweight and obese in adolescence is associated with severe health effects during their lifetime The purpose of this study was to explain the mediating role of self-compassion in the relationship between family cohesion, stress, and quality of life with body mass index in adolescent girls Method: The current research was descriptive-multiple linear regression From among the statistical population of the research, 250 teenage girls were selected as the research sample using a multi-stage cluster sampling method, and finally, after dropping 50 people from the sample group, the data of 200 of them were analyzed. The tools of data collection included the Samani Family Cohesion Questionnaires (2001), Byrne and Mazano Stress (2002) Scale, the World Health Organization Quality of Life (1996) questionnaire, and the NAF Self-compassion (2003) inventory. For data analysis, structural equation modeling was performed using SPSS26 and AMOS24 software. Results: The results showed that the model of body mass index based on the quality of life, family cohesion, and stress with the mediating role of self-compassion has a good fit. It also indicated that family cohesion, stress, and quality of life did not predict body mass index in adolescent girls, But quality of life predicts body mass index in adolescent girls. Conclusion: It seems that self-compassion plays a mediating role in the relationship of body mass index with family cohesion, stress, and quality of life in adolescent girls. 

 Objective: This study aimed to examine the effects of reality therapy on improving psychological capital and sense of cohesion among Iranian Patients with Multiple Sclerosis. Method: This study was performed in Tehran in 2021. Sampling was employed to select 36 participants who completed the Psychological Capital Questionnaire and Sense of Cohesion Scale in the pretest, posttest, and onemonth follow-up stages. The participants of the experimental group underwent eight weekly 90-minute sessions to receive the online reality therapy; However, the control group received no intervention. Results: Data analysis showed a significant difference in psychological capital and sense of cohesion in the experimental group compared to the control group (P< 0/05). There was a significant difference in three subscales of psychological capital (i.e., self-efficacy, resilience, and hope) and two subscales of the sense of cohesion (i.e., perceptibility and controllability) in Patients with MS in the experimental group (P <0.05), but no significant difference in optimism (a subscale of the psychological capital) and significance (a subscale of sense of cohesion) (P> 0.05). Conclusion: Due to the effects of reality therapy on patients with multiple sclerosis, this psychological therapy can be employed to improve the psychological capital and sense of cohesion.

The presence of a suitable organization in the organization can improve performance and effectiveness, and as a result, increase the efficiency of organizations. Among the indicators that the organizational culture has an organizational effect according to its characteristics. This study was conducted with the aim of the effect of organizational culture on the organizational effectiveness of administrative staff with the mediation of organizational creativity in the employees of the education. The research method was correlational. The sample population was 172 employees based on Singh and Moscow's sample size determination table. data collect, Dennison's Organizational Culture Questionnaire (2000), Parsons (2005) Organizational Effectiveness Questionnaire (AGIL) and Dorabjee, Lumley, and Cartwright (1998) Organizational Creativity Questionnaire were used. The reliability of the questionnaires was obtained using Cronbach's test as 0.88, 0.90 and 0.89 respectively. The data were analyzed using SPSS25 and Lisrel8.8 software by structural equation modeling method. The findings of the research showed that organizational culture has a positive and significant effect on organizational creativity. Organizational creativity does not affect organizational effectiveness. Also, organizational culture has a positive and significant effect on the organizational effectiveness of office employees through the mediating role of organizational creativity. It is suggested that managers increase the level of organizational creativity in themselves and the organization by rediscovering and recognizing the organizational culture and using its strengths. They can accelerate this by providing continuous and diverse training and using different methods in order to increase the level of knowledge and improve job skills.