Saeid Aboghabish; Nahid Shetabboushehri; Afkham Daneshfar; Rasool Abedanzadeh
Volume 2, Issue 7 , February 2017, , Pages 93-106
Abstract
Introduction: Thus, this study was aimed to investigate the first stimulus simplification and significant interference on the second reaction time. Dual stimulus task is an appropriate way to investigate humans’ limited capacity of information processing. Methods: The participants included 17 male ...
Read More
Introduction: Thus, this study was aimed to investigate the first stimulus simplification and significant interference on the second reaction time. Dual stimulus task is an appropriate way to investigate humans’ limited capacity of information processing. Methods: The participants included 17 male students of Shahid Chamran University whose age average was 23.45±1.54. All of them performed a dual task test within four intervals of 50, 100, 300, 900 ms between asynchronous onset of two stimuli under congruent and incongruent and neutral conditions. Findings: The results of ANOVA with repeated measure at the significance level of P˃0.05 indicated that simplification of the first congruent stimulus, compared to incongruent and neutral stimuli; reduces the reaction time for second congruent and neutral stimuli. The required change of attention processes in dual task with second incongruent stimulus causes on significant effect of first congruent and neutral stimulus precedence over second incongruent stimulus. Conclusion: The findings suggest that simultaneous performance of dual tasks with high information processing capacity or divided attention among non-automatized tasks should be avoided. Moreover, for intial of simplification processes and significant interference at leat 100 ms be required.
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 ...
Read More
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.
