This study tried to control for all the confounding factors, so it looked at children who were equally intelligent and from the same social-class background, so it seemed as if it was the reading which really helped those children go on and score better on those school tests later in their lives.
در این تحقیق  تمام عوامل غیرمنتظره را مدنظر قرار دادند به کودکانی نگاه کردند  که هوش یکسانی داشتند و از طبقه اجتماعی یکسانی می‌آمدند، پس بنظر می‌رسید که این خواندن بود  که بچه‌ها را کمک می‌کرد که در امتحانها به نتایج بهتری برسند،