Alireza Moradi, Mahboobeh Bagheri, Peyman Hassani Abharian,
Volume 6, Issue 4 (3-2019)
Abstract
The aim of this research was to determine the effectiveness of tDCS and cognitive rehabilitation of working memory and the combination of these two methods on speed of processing and symptoms of dyslexia on bilingual children. Research method; semi experimental (pre-test, post-test and control group). Research population included all of the bilingual children at both sex at the age of 7-11 in Tehran and Kahrizak cities. Available samples were selected through Wexler intelligent questionnaire and Nama dyslexia test scores, so that 40 dyslexic students (based on school diagnostic system) and situated randomly in 4 groups: a) intervention by tDCS brain stimulation, b) computational cognitive rehabilitation via working memory module of RehaCom, c) simultaneous intervention of computational cognitive rehabilitation and brain stimulation tDCS and d) control group. Nama and speed of processing (SDMT) tests have been performed on all of the four groups in pre-test and post-test in order to data collecting. Data analysis results using analysis of multi-variable covariance in SPSS-22 showed that mentioned interventions could have meaningful changes in speed of processing and in decreasing dyslexia symptoms. Post hoc test results also showed that combination method first of all and then brain stimulation method have been the most effectiveness, but the mere computational cognitive rehabilitation method has not been influenced on these two variables alone.
Reza Chamani, Dr. Fatemeh Bagherian, Omid Shokri,
Volume 7, Issue 1 (volume7, Issue 1 2019)
Abstract
The purpose of this study is to determine the quality of individual economic decision making under risk and uncertainty. The research method is a quasi-experiment with single group and a post-test. The total population of the students of Shahid Beheshti University in 97 was 8.700 and due to non-normal distribution, we should use non-parametric Wilcoxon test, with sample of 180. The tool used to investigate the role of cognitive biases that prospect theory in economic decision-making was predicted was a multi-dimensional task we built which measured 31 problems in 5 sections that through phenomena such as risk aversion, loss aversion, ambiguity aversion, reference dependency, probability weighting and so on in shows irrationality in economic decision–making. Higher score means more irrational according to neoclassical economics. The median of scores was 25 out of 31 scores. In other words, more than 80% of participants received grades above 50% (or 15.5 points) (p <0.05). These findings fully supported the prospect theory that first two cognitive psychologists proposed as a correction to the expected utility theory. The prospect theory can explain, and can predicts, and intends to dissolve the gap between economy and psychology. The present research is an initial step in showing the significant role of psychology and cognition in economic decision-making and emphasize the importance of psychology in explaining economic tendencies and findings especially in our country, as the founders of the economy have expressed many centuries ago.
