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تأثیر دستبرتری و دشواری تکلیف بر پهنای مؤثر هدف و دقت زمانی تکلیف مبادلۀ سرعت- دقت فیتز | ||
| رشد و یادگیری حرکتی ورزشی | ||
| مقاله 7، دوره 11، شماره 3، آذر 1398، صفحه 343-360 اصل مقاله (973.56 K) | ||
| نوع مقاله: مقاله پژوهشی Released under CC BY-NC 4.0 license I Open Access I | ||
| شناسه دیجیتال (DOI): 10.22059/jmlm.2019.276449.1431 | ||
| نویسندگان | ||
| محمدرضا دوستان* 1؛ لیلا فرزاد2؛ اسماعیل صائمی3؛ ملیحه نیکنام2 | ||
| 1مربی گروه رفتار حرکتی، دانشکده علوم ورزشی، دانشگاه شهید چمران اهواز، اهواز، ایران | ||
| 2کارشناس ارشد رفتار حرکتی، دانشگاه آزاد اسلامی واحد شوشتر، شوشتر، ایران | ||
| 3استادیار گروه رفتار حرکتی، دانشکده علوم ورزشی، دانشگاه شهید چمران اهواز، اهواز، ایران | ||
| چکیده | ||
| هدف از پژوهش حاضر، بررسی تأثیر دستبرتری و دشواری تکلیف بر پهنای مؤثر هدف و دقت زمانی تکلیف مبادلۀ سرعت- دقت فیتز بود. پژوهش حاضر از نوع پژوهش‌های نیمه‌تجربی بود. ابزار مورد استفاده شامل پرسشنامۀ دست برتری ادینبورگ، قلم نوری، دستگاه سنجش مبادلۀ سرعت- دقت، لپ‌تاپ، کرنومتر و مترونوم بود. جامعۀ آماری پژوهش را دانش‌آموزان 14 و 15 ساله و نمونه را 20 نفر تشکیل دادند (20=n) که به روش نمونه‌گیری در دسترس در پژوهش شرکت کردند. آزمودنی‌ها به دو گروه 10 نفرۀ راست‌دست و چپ‌دست تقسیم شدند. هر آزمودنی چهار کوشش 30 ثانیه‌ای تکلیف ضربه‌زنی دوطرفه به اهداف موردنظر را هماهنگ با صدای مترونوم انجام می‌داد. کوشش‌ها شامل دو تکلیف آسان و دشوار بود که آزمودنی هر تکلیف را با دست برتر و غیربرتر، هماهنگ با صدای مترونوم که با ضرباهنگ 300 هزارم ثانیه تنظیم شده بود، انجام داد. برای تحلیل آماری داده‌ها از تحلیل واریانس با اندازه‌گیری‌های تکراری در سطح معناداری 05/0 استفاده شد. نتایج نشان داد که دستبرتری و دشواری تکلیف بر پهنای مؤثر هدف تأثیر معناداری ندارد (973/0p= و 611/0p=). همچنین دستبرتری بر میانگین وقفۀ زمانی نیز تأثیر نداشت (135/0p= و 785/0p=)، ولی در اندام غیربرتر میانگین وقفۀ زمانی برای تکلیف دشوار بیش از تکلیف آسان بود (001/0p=). به‌نظر می‌رسد شرکت‌کنندگان در تکالیف دشوار با کاهش سرعت حرکت سعی می‌کنند میزان خطای فضایی را ثابت نگه‌دارند و سرعت را فدای دقت فضایی می‌کنند. همچنین خطای زمانی (میانگین وقفه) بیشتر تحت تأثیر دشواری تکلیف است تا دستبرتری. | ||
| کلیدواژه‌ها | ||
| پهنای هدف؛ دست برتری؛ دشواری تکلیف؛ قانون فیتز | ||
| عنوان مقاله [English] | ||
| The Effect of Handedness and Task Difficulty on Effective Target Width and Temporal Accuracy in Fitts’ Speed-Accuracy Tradeoff Task | ||
| نویسندگان [English] | ||
| Mohammadreza Doustan1؛ Leila Farzad2؛ Esmaeel Saemi3؛ Maliheh Niknam2 | ||
| 1Instructor, Department of Motor Behavior, Faculty of Sport Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran | ||
| 2MSc of Motor Behavior, Faculty of Sport Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran | ||
| 3Assistant Professor, Department of Motor Behavior, Faculty of Sport Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran | ||
| چکیده [English] | ||
| The aim of this study was to investigate the effect of handedness and task difficulty on effective target width and temporal accuracy of the Fitts’ speed-accuracy tradeoff task. The present study was semi-experimental and the tools used included Edinburgh handedness questionnaire, light pen, speed-accuracy measurement device, laptop, chronometer, and metronome. The statistical population consisted of students aged between 14 and 15. The sample included 20 students who participated in this study by convenience sampling method. They were divided into two groups: left-hand and right-hand (each group 10 subjects). Each participant performed 4 trials (each trial 30 seconds) of dual target tapping task in rhythm with the metronome sound. The trials consisted of two easy and difficult tasks and each subject performed each task with dominant and not-dominant hands in rhythm with the metronome sound set up at 300 milliseconds. For statistical analysis of data, variance analysis with repeated measures was used at the significance level of 0.05. The results showed that in dominant hand, the handedness and difficulty of the task had no significant effect on the effective width of the target (P=0.973, P=0.611). Also, the handedness did not affect the average time lag (P=0.135, P=0.785), but in non-dominant hand, the average time lag was more for the difficult task than the simple task (P=0.001). In difficult tasks, participants seem to be trying to keep the spatial error rate constant by reducing the speed of the movement and to sacrifice speed for the spatial accuracy. Also, the time error (mean lag) is more influenced by the difficulty of the task than the handedness. | ||
| کلیدواژه‌ها [English] | ||
| Fitts’ law, handedness, target width, task difficulty | ||
| مراجع | ||
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