مطالب

This study aimed to examine the predictive role of hope and emotion regulation in perceived discrimination among adults with physical disabilities. The study employed a correlational descriptive design with a sample of 390 adults with physical disabilities, selected based on the Morgan and Krejcie table. Participants completed validated measures assessing perceived discrimination, hope, and emotion regulation, including the Perceived Discrimination Scale, the Adult Hope Scale, and the Emotion Regulation Questionnaire. Data analysis was conducted using Pearson correlation to examine associations between variables and multiple linear regression to determine the predictive effect of hope and emotion regulation on perceived discrimination. Statistical analyses were performed using SPSS-27, with significance set at p < 0.01. The results indicated a significant negative correlation between hope and perceived discrimination (r = -0.45, p < 0.01) and between cognitive reappraisal and perceived discrimination (r = -0.38, p < 0.01), while expressive suppression was positively correlated with perceived discrimination (r = 0.41, p < 0.01). The regression model was statistically significant (F(2, 387) = 53.04, p < 0.01) with an R² value of 0.27, indicating that hope and emotion regulation explained 27% of the variance in perceived discrimination. Hope (B = -0.39, p < 0.01) and cognitive reappraisal (B = -0.28, p < 0.01) negatively predicted perceived discrimination, whereas expressive suppression (B = 0.31, p < 0.01) was a positive predictor. The findings suggest that hope and adaptive emotion regulation strategies, particularly cognitive reappraisal, serve as protective factors against perceived discrimination, whereas expressive suppression exacerbates discriminatory perceptions. These results highlight the importance of psychological interventions aimed at fostering hope and teaching adaptive emotion regulation strategies to mitigate the impact of discrimination in individuals with physical disabilities.

This research investigates how CEO traits influence a company's financial outcomes. The study, which focused on firms listed on the Tehran Stock Exchange (TSE) from 2013 to 2023, employed panel data models for estimation and testing. Indicators like CEO ownership, duality, and tenure were utilized to represent CEO characteristics, while Return-on-Assets (ROA) was used to evaluate Firm Performance (FP). The findings revealed a positive and significant correlation between CEO ownership and tenure with FP (ROA). Additionally, CEO duality did not show a significant connection with FP. Although similar research has been conducted in developed markets, comprehensive studies of this nature have been relatively rare in the Iranian economic context, which possesses distinct features such as the impact of governmental institutions, specific taxation regulations, and an ownership structure characterized by concentration

In this paper, the European option pricing is done using neural networks in the Black-Scholes-Vasicek market. The general purpose of this research is to compare the accuracy of neural network and Black-Scholes-Vasicek models for the pricing of call options. In the sequel, the finite difference method is applied to find approximate solutions of partial differential equation related to option pricing in the considered market. In the design of the artificial neural network required for this research, the parameters of the Black-Scholes-Vasicek model have been used as network inputs, as well as 720 data from the daily price of stock options available in the Tehran Stock Exchange market (in 1400) as the network output. The approximate solutions obtained in this article, which were carried out by two methods of neural networks and finite differences on the Tehran stock exchange based on the daily price of stock options, are shown that neural networks are more accurate method comparing with finite difference. The comparison of pricing results using neural networks with real prices in the assumed market is presented and shown via diagram, as well. In this paper, the European option pricing is done using neural networks in the Black-Scholes-Vasicek market. The general purpose of this research is to compare the accuracy of neural network and Black-Scholes-Vasicek models for the pricing of call options. In the sequel, the finite difference method is applied to find approximate solutions of partial differential equation related to option pricing in the considered market. In the design of the artificial neural network required for this research, the parameters of the Black-Scholes-Vasicek model have been used as network inputs, as well as 720 data from the daily price of stock options available in the Tehran Stock Exchange market (in 1400) as the network output. The approximate solutions obtained in this article, which were carried out by two methods of neural networks and finite differences on the Tehran stock exchange based on the daily price of stock options, are shown that neural networks are more accurate method comparing with finite difference. The comparison of pricing results using neural networks with real prices in the assumed market is presented and shown via diagram, as well.

Objective: This study aimed to investigate the mediating role of anxiety in the relationship between parental conflict and adolescent sleep problems. Methods: A descriptive correlational design was employed using a sample of 404 adolescents from Pakistan, selected based on the Morgan and Krejcie table. Participants completed standardized questionnaires measuring perceived parental conflict, anxiety symptoms, and sleep disturbances. Data analysis was conducted using SPSS-27 for Pearson correlation analysis and AMOS-21 for Structural Equation Modeling (SEM). The assumptions of normality, linearity, and multicollinearity were confirmed prior to analysis. The SEM approach allowed for testing both direct and indirect pathways within the proposed mediation model. Findings: Results from Pearson correlation indicated significant positive associations between parental conflict and anxiety (r = .51, p < .001), anxiety and sleep problems (r = .55, p < .001), and parental conflict and sleep problems (r = .47, p < .001). The structural model demonstrated good fit indices (χ² = 204.38, df = 84, χ²/df = 2.43, GFI = 0.94, AGFI = 0.91, CFI = 0.96, TLI = 0.95, RMSEA = 0.059). SEM analysis showed that parental conflict significantly predicted anxiety (b = 0.38, p < .001) and sleep problems (b = 0.19, p < .001), while anxiety significantly predicted sleep problems (b = 0.42, p < .001). The indirect effect of parental conflict on sleep problems through anxiety was also significant (b = 0.16, p < .001), confirming the mediating role of anxiety. Conclusion: The findings indicate that anxiety is a significant mediator in the relationship between parental conflict and adolescent sleep disturbances. These results underscore the need for family-based and anxiety-focused interventions to address sleep problems in adolescents exposed to high-conflict home environments.

Objective: The aim of this study was to compare the effectiveness of mindfulness-based therapy and transactional analysis on sexual function and sexual satisfaction in female patients with bipolar disorder. Methods: In this study, 20 women with bipolar disorder who referred to the Gyrus Specialty Neurology and Psychiatry Clinic in Tehran from April to August 2022 were selected through purposive sampling and randomly assigned to three groups: mindfulness-based therapy, transactional analysis therapy, and a control group. All participants completed the Female Sexual Function Index (FSFI) by Rosen et al. (2000) and the Sexual Satisfaction Scale by Larson et al. (1998) before and after the intervention. The mindfulness-based therapy group underwent eight 90-to-120-minute sessions held twice a week, while the transactional analysis group received treatment in nine 60-to-120-minute sessions held twice a week. Data were analyzed using descriptive statistics and repeated measures analysis. Findings: The results indicated that both mindfulness-based therapy and transactional analysis therapy had an effect on sexual function and sexual satisfaction in female patients with bipolar disorder. Moreover, a comparison of the effectiveness of the two therapeutic approaches across all dimensions showed that mindfulness-based therapy had a greater impact on sexual function and sexual satisfaction in female patients with bipolar disorder compared to transactional analysis. Conclusion: Therefore, the use of mindfulness-based therapy is recommended in psychology clinics.

Objective: The present study aimed to examine and compare the effectiveness of emotion-focused therapy and schema therapy on attachment styles and emotion regulation in women affected by infidelity. Methods and Materials: This research employed a quasi-experimental design with a pretest–posttest and control group. The statistical population included all women affected by infidelity who referred to counseling centers in Tehran in 2023. From this population, 45 participants were selected using purposive sampling and randomly assigned to three groups: the first experimental group (emotion-focused therapy, 15 participants), the second experimental group (schema therapy, 15 participants), and the control group (15 participants). The experimental groups received the respective interventions across a set number of sessions, while the control group did not receive any intervention. All three groups were assessed at pretest, posttest, and follow-up stages using the Attachment Styles Questionnaire and the Emotion Regulation Questionnaire. Findings: Data analysis using repeated measures analysis of variance and post hoc tests indicated that both therapeutic approaches led to significant improvements in attachment styles and enhanced emotion regulation abilities in women affected by infidelity (p < .05). Moreover, a comparison of results showed that schema therapy demonstrated greater effectiveness than emotion-focused therapy in certain indices. Conclusion: Based on the findings, emotion-focused therapy and schema therapy can be considered effective approaches for promoting secure attachment styles and improving emotion regulation among women affected by infidelity.