Somayeh Rezayimanesh; Nahid Shetab boushehri; Parvaneh Shafee nia; Mohammadreza Doostan
Volume 2, Issue 6 , December 2016, , Pages 107-122
Abstract
Introduction: Nowadays, the research results suggest that brainwaves change in different Psychological conditions. Therefore, this study aims to investigate the cognitive challenges on quantitative electroencephalography (QEEG) pattern. Method: EEG was recorded from Cz in 26 right-handed individuals ...
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Introduction: Nowadays, the research results suggest that brainwaves change in different Psychological conditions. Therefore, this study aims to investigate the cognitive challenges on quantitative electroencephalography (QEEG) pattern. Method: EEG was recorded from Cz in 26 right-handed individuals including 13 male and 13 female students. During two conditions: At rest condition Subjects looked at the white screen computer for one minute from a distance of 90 cm. Then, ‘React Traking soccer’ was run for one minute (cognitive challenges condition). Findings: The data analysis showed that the main effect of mental condition (from rest to cognitive challenge) was not significant (F=2/73, p < 0/05) but the main effect of frequency band (F=159/412, p < 0/05) and interaction effect of frequency bands and mental condition were significant (F=21/10, p < 0/05). These results suggest that cognitive challenge interact with different frequency bands and frequency bands, indicating that the amplitude of different frequency bands modulated in different mental states (from rest to cognitive challenge). Conclusion:Findings of the present study approved the role of cognitive challenge on changing brain waves associated with cognition compared to baseline.
Raha Rostamifar; Mohammad Jalilvand
Volume 2, Issue 5 , September 2016, , Pages 57-70
Abstract
Introduction: The aim of this study was to investigate effect of exercise on visual-auditory and auditory-visual dual frequency assignment in psychological refectory period. Method: 45 students from 18 to 28 years were chosen through purposive sampling from Khorramshahr and were randomly divided into ...
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Introduction: The aim of this study was to investigate effect of exercise on visual-auditory and auditory-visual dual frequency assignment in psychological refectory period. Method: 45 students from 18 to 28 years were chosen through purposive sampling from Khorramshahr and were randomly divided into three groups: practicing with task visual-auditory, task auditory-visual and control group, each group consisted of 15 people. The dual task test visual-audio and audio-visual was done with all subjects. The interval between the two stimuli was 50 and 75 (short distance) 200 and 250 ms (long distance) (Generally 8 trial visual-audio and 8 trial audio-visual). The training program included 5 sessions in 5 days. Each session includes 12 blocks of 8 trials with visual-auditory double task personification pre-test and the two-minute rest intervals between blocks. Findings The results of ANOVA showed that there was a significant difference between the groups in terms of all sequences in all four stimulus onsets but there was no significant difference between the display of the visual stimulus presentation and auditory presentations. Conclusion: Double Task Practice by increasing the stimulus-response compatibility reduces the need for attention and reducing the required attention capacity which is possible for the two stimuli at the same processing can have positive effect on psychological refectory period as well as the task of visual-auditory and auditory- visual with an interval of high and low.
