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تأثیر دست‌برتری و دستکاری شاخص دشواری بر مؤلفه‌های رفتاری و عصبی اجرای تکلیف مبادلة سرعت- دقت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مربی گروه رفتار حرکتی، دانشکده علوم ورزشی، دانشگاه شهید چمران اهواز، اهواز، ایران

2 دبیر تربیت بدنی، اداره آموزش و پرورش شهرستان شوشتر، شوشتر، ایران

3 استادیار گروه رفتار حرکتی، دانشکده علوم ورزشی، دانشگاه شهید چمران اهواز، اهواز، ایران

چکیده

هدف پژوهش حاضر، بررسی تأثیر دست‌برتری و دشواری تکلیف بر مؤلفه‌های رفتاری و عصبی تکلیف مبادلة سرعت- دقت بود. پژوهش ازنوع نیمه‌تجربی و به‌لحاظ هدف، بنیادی بود. شرکت‌کنندگان 20 دانش‌آموز ۱۴ و 15 ساله بودند. ابزارها شامل EEG چهارکاناله، قلم نوری و حسگر، لپتاپ، مترونوم و نرم‌افزارTarget-Tapping-Test  بود.شرکت‌کنندگان براساس نمراتپرسش‌نامة دست‌برتریادینبررگ، به دو گروهچپ‌برترو راست‌برتر تقسیم شدند و در مدت زمان ۳۰ ثانیه تکالیف سرعت- دقت ساده و دشوار را با دست برتر و غیربرتر انجام دادند؛ به‌طوری‌که خروجی رفتاری از قلم نوری و پد لمسی (خطاهای فضایی و زمانی) و داده‌های EEG از نواحی مغزی ثبت شد. برای تحلیل داده‌ها از تحلیل واریانس با اندازه‌گیری‌های تکراری در سطح معناداری 05/0 استفاده شد.نتایج نشان داد که دست غیربرتر بیش از دست برتر تحت‌تأثیر دشواری تکلیف قرار گرفت و خطای فضایی بیشتری داشت. دست‌برتری و دشواری تکلیف بر پهنای مؤثر هدف تأثیر معناداری نداشت. میانگین وقفة زمانی در اندام غیربرتر برای تکلیف دشوار بیش از تکلیف آسان بود. در ناحیة C3، توان موج گاما در تکلیف دشوار بیشتر و در افراد راست‌دست در دست غیربرتر بالاتر بود. در ناحیة F4‌، توان موج آلفا برای افراد چپ‌دست درهنگام انجام حرکت دشوار بالاتر از تکلیف آسان بود.به‌نظر می‌رسد که در تکالیف نیازمند دقت و سرعت، خطاهای فضایی و زمانی تحت‌تأثیر دشواری تکلیف قرار می‌گیرند؛ ولی خطای زمانی بیش از خطای فضایی تحت‌تأثیر دشواری تکلیف است تا دست‌برتری. همچنین، نواحی حرکتی نیمکرة چپ و فورنتال نیمکرة راست مهم‌تر از سایر نواحی در اجرای تکلیف هستند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Handedness and Manipulation of the Index of Difficulty on the Behavioral and Neural Components of Speed-Accuracy Trade Off

نویسندگان [English]

  • Mohammad Reza Doustan 1
  • Leila Farzad 2
  • Esmaeel Saemi 3

1 Teacher of Motor Behavior, Shahid Chamran University of Ahvaz

2 Teacher of Physical Education in Education Department of Shoushtar, Shoushtar

3 Assistant Professor of Motor Behavior, Shahid Chamran University of Ahvaz

چکیده [English]

The purpose of this study was to evaluate the effect of handedness and task difficulty on behavioral and neural components of speed-accuracy trade off. The study was a Quasi-experimental research and focused on fundamental research. The participants of this study consisted of 20 students aged 14 and 15 years old. The instrument was four-channel EEG, optical sensor with sensor, laptop, metronome, and Target-Tapping-Test software. Given the Edinburgh handedness questionnaire scores, participants were divided into two left-hand and right-hand groups. They performed the simple and difficult tasks in a 30s with dominant and non-dominant hands. At the same time, the behavioral output as output digits from the pen and tablet (spatial and temporal errors) and the EEG data from the brain regions. For data analysis, repeated measures ANOVA was used at the significance level of 0.05. The results showed that non-dominant limb is affected to the task difficulty than dominant hand, and has more spatial error. The handedness and task difficulty had no significant effect on the effective width of the target. In the non-dominant limb, the average interruption for difficult task was more than simple task. In the C3 region, the gamma wave power was higher in a difficult task than in an easy task, and in right-handed subjects was higher in the hand. In the F4 area, the power of the alpha wave was easy for left-hand people when performing difficult moves above the task. Seems, in tasks that require accuracy and speed, spatial and temporal errors are affected by the task difficulty and handedness, But the timing errors is more affected by the task difficulty than the handedness. It also seems that the left and right frontal lobe areas are more important than other areas in Fitz's task execution.

کلیدواژه‌ها [English]

  • Fitz's Task
  • Handedness
  • Task Difficulty
  • Brain Hemispheres
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رفتار حرکتی
دوره 10، شماره 34
زمستان 1397
دی 1397
صفحه 121-150
فایل ها
سابقه مقاله
  • تاریخ دریافت: 15 دی 1397
  • تاریخ بازنگری: 11 اسفند 1397
  • تاریخ پذیرش: 25 اسفند 1397
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