درخت حوزه‌های تخصصی

The study analyzed a corpus of 40 emails of requests composed by Vietnamese students to their university lecturers. The study purpose was to identify politeness strategies composed by Vietnamese students using Brown and Levinson’s model and Blum-Kulka, House and Kasper’s framework as guidelines. To obtain the results, a discourse analysis was implemented. The AnConc software was used as a research tool for the study. 40 emails from 80 students were collected and divided into three types of requestive emails: assistance, confirmation and consideration, and recommendation for data analysis. Syntactical and lexical modifiers were examined and politeness markers were identified manually by the assistance of the AnConc software. The results indicated that Vietnamese students often used status-stating, deferent and solidary politeness strategies to approach their professors for personal requests. While using these three strategies, the target students had to use syntactical and lexical devices such as modals, interrogatives, please, and hedges as speech acts or supportive moves to gain their requestive purposes. The study also identified a common pattern that Vietnamese students liked to use the email corpus in the direction of salutation, self-introduction, requests, reasons for request, and thank compliments. The study has pedagogical implications for language teachers and learners; e.g. email writing should be taught to students, especially ESP students as these students do not know the format and the appropriate language they should use in email composition. Language students should also pay attention to the correct formal form and cultural differences when composing requestive emails delivered to their professors.

This study aimed at determining the effect of forehead cortex electric current stimulation on inhibitory control and working memory in people with attention deficit and hyperactivity disorder (ADHD), using TDCS device. The method used was quasi-experimental research with pretest-posttest control group design. The participants were 24 children with attention deficit and hyperactivity disorder aged 7-11 who referred to Baqiyatallah Hospital in 1397. Children were randomly divided into experimental (n = 12) and control (n = 12) groups. The experimental group was intervened in 10 sessions, 3 times a week, and each session was 20 minutes. Assessments were performed in 3 steps, a day before the intervention, and a day after the intervention ended, and finally at the follow-up phase, two months after the intervention was accomplished. Go/no Go and N-back tests were used to evaluate inhibitory control and working memory, respectively.  A repeated measurement method was applied to analyze the data. Findings revealed that brain electric stimulation program improves working memory and inhibitory control in children with attention deficit hyperactivity disorder. Therefore, brain electric stimulation program can be used to enhance the working memory and inhibitory control of children with attention deficit hyperactivity disorder.

The present study aimed to compare the effects of physical, cognitive and combined rehabilitation on improving working memory and cognitive flexibility of the elderly living in the nursing home. This quasi-experimental study was carried out with a pretest-posttest design in four groups with the control group. The statistical population consisted of all elderly residents of a nursing home in Tehran. 48 people were selected randomly and divided into four groups (three experimental groups and one control group). For the experimental groups, intervention programs, including physical, cognitive, and combined rehabilitation, were conducted in three sessions of one hour each week for two months. The data were collected using a working memory capacity scale and a cognitive flexibility inventory (CFI). Data was analyzed using a one-way analysis of covariance (ANCOVA) and Bonferroni post hoc test using SPSS software version 22. The results showed that all three types of rehabilitation programs have a significant effect on improving the working memory and cognitive flexibility of the elderly (P <0.001). Also, the mean of the groups in the pre-test and post-test stages showed that among the three programs, the combined rehabilitation program had more efficacy in improving the working memory and cognitive flexibility of the elderly and there was no difference between the two types of physical and cognitive rehabilitation programs (P> 0.001) According to the findings, combined rehabilitation programs can be effective in improving the working memory and cognitive flexibility due to the focus on both physical and cognitive aspects.

The purpose of this study was to investigate the role of informal English language teaching in childhood on English knowledge and attitude towards the English language in adulthood. The research design was of a causal-comparative nature. The statistical population included all the first-year undergraduate students of Islamic Azad Universities who had been studying humanities in the academic year of 2015-2016. A sample size of 200 students was selected by multistage cluster sampling method. The research tools were English knowledge test and attitude questionnaire which were developed by the researcher.  Statistical analyses using MANOVA was implemented. Findings revealed that the informal English language teaching in childhood, as compared to its absence, leads to more English knowledge and improves attitude towards the English language in adulthood. Based on the obtained results, it is recommended that English language learning should not only start at an earlier age but it should also and be taught informally.