محاسبه اندازه اثر در طرح‌های تک‌آزمودنی با استفاده از روش‌های ناهمپوش

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده روانشناسی، دانشگاه تبریز

2 هیئت علمی دانشگاه تبریز

3 دانشگاه تبریز

4 دانشیار گروه روانشناسی دانشگاه تبریز

چکیده

گزارش اندازه ­اثر در طرح­های تک ­آزمودنی در سال­های اخیر بسیار مورد توجه قرار گرفته است. روش­های متنوعی برای محاسبه اندازه اثر در طرح­های تک ­آزمودنی وجود دارد. پژوهش حاضر با هدف توصیف محاسبه اندازه­ اثر‌ با استفاده از روش­های ناهمپوش که غیرپارامتریک و نابسته به توزیع هستند و همچنین بررسی نقاط قوت و ضعف هر یک از این روش­ها را انجام شد. در یک پژوهش تک ­آزمودنی از نوع AB دوازده جلسه درمان نوروفیدبک برای بررسی اثربخشی آن بر بهبود توجه بینایی- فضایی در یک کودک 8 ساله مبتلا به اختلال خواندن انجام شد. برای    جمع­آوری داده­ها از آزمون پاسنر استفاده شد و برای تحلیل داده­ها، اندازه اثر با استفاده از     روش­های ناهمپوش PND، PAND،‌ ECL، PEM، NAP و TAUnovlap محاسبه شد. نتایج پژوهش نشان داد که میزان اندازه اثر با استفاده از روش­های ناهمپوش بین 69 تا 84 درصد به­دست آمد که­ نشان­دهنده اثربخشی مثبت نوروفیدبک در بهبود توجه بینایی- فضایی بود. پژوهش حاضر می­تواند راهنمای پژوهشگران و درمانگران در نحوه استفاده از روش­های ناهمپوش برای محاسبه اندازه اثر در طرح­های تک­ آزمودنی و تصمیم­گیری درباره اثرات درمان باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Calculating Effect Size in Single-Case Research using Nonoverlap Methods

نویسندگان [English]

  • Elnaz Mousanezhad Jeddi 1
  • Shahram Vahedi 2
  • Mohammad Ali Nazari 3
  • Touraj Hashemi 4
1 Department of Psychology, University of Tabriz
2 Professor of Psychology
3 University of Tabriz
4 University of Tabriz
چکیده [English]

Reporting of the effect size in single subject designs that there are different ways to calculate it, has received an increased attention in recent years. Objective: The aim of this paper is to describe the calculating of effect size using non-overlap methods that are non-parametric and distribution-free and also evaluate their strengths and limitations. In a AB single subject design, 12 sessions of neurofeedback training were done for an 8-years old child who had reading disorder to determine its effectiveness in improvement of the visuospatial attention. Data was gathered using Posner Test and analyzed using PND, PAND, ECL, PEM, NAP and TAUnovlap methods. The result showed that effect sizes were obtained between 69 to 84% indicating the effectiveness of treatment in improving of visuospatial attention. This paper could be a guideline for researchers and clinicians in using non-overlap methods for calculating the effect size and deciding about the effect of treatment.

کلیدواژه‌ها [English]

  • Effect size
  • Non-overlap methods
  • Single subject design
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