Showing 2 results for Ashayeri
Amir Mohammad Shahsavarani,, S. Kazem Rasoolzadé Tabatabaei, Hassan Ashayeri, Kolsoom Sattari, Mostafa Mohammadi,
Volume 3, Issue 1 (5-2009)
Abstract
The purpose of the present study was to investigate the effects of stress on visual selective (focused) attention according to openness to experience. Sixty 21-36 year-old male students (M= 26.7) were selected and placed in 3 groups (Original, O & Control) using random multi-stage sampling. The Original and O groups’ subjects administered the cognitive stressor tasks and then their selective (focused) visual attention was measured in term of errors in counting and errors in classification. In control group only selective (focused) visual attention was assessed. Neuropsychological variables were also assessed as control variables. The Original group subjects showed significantly more scores in both counting and classification errors (p<0.0001) and O group showed significantly more scores in both errors than the Original (p<0.01). The results reveal that stress has negative effects on selective (focused) visual attention. These findings are not consistent with other related research that is discussed regarding to considerations of openness to experience and neuropsychological control variables.
Neda Nazarboland, Parviz Azadfallah, Ali Fathi Ashtiani, Hasan Ashayeri,
Volume 5, Issue 1 (9-2011)
Abstract
This study investigated the degree of cortical arousal of the forehead during working memory performance in personality dimension of anxiety. Based on Gray’s definition of personality dimension of anxiety, in a pseudo-empirical study a sample of female students (n=793) aged from 18 to 28 years old completed Eysenck Personality Questionnaire and Carver and White’s Approach/Avoidance scale. 15 subjects whose scores were simultaneously in the upper distribution of Neuroticism and lower distribution of Extraversion (N+E-) were selected as high trait anxiety group (Anx+), and low trait anxiety group (Anx-) consisted of 15 subjects with higher scores of Extraversion and lower scores of Neuroticism (N-E+). Then their EEG was taken in baseline mode and while performing working memory task. Total scores in 1-back working memory task were taken as the indicator of working memory performance and EEG alpha oscillation during 1-back task was taken as cortical arousal index. Data were analyzed using T-test for independent samples. Results revealed that high trait anxious subjects showed more arousability in their right and left cortex of forehead during working memory performance, while their performance in working memory tasks was impaired in comparison with low trait anxious group. These Results supported Processing Efficiency Theory, which means although high trait anxious individuals employed higher mental effort during executive functions, their processing efficiency was impaired.
