<prompt> Translate the following text to EnglishHata hivyo, utafiti uliofanywa katika chuo kikuu cha Harvard ulionyesha kwamba watu waliofanya kazi ya kufunika nyumba walifanya makosa makubwa mara sita zaidi kuliko watu waliochoka.  <response>: However, a Harvard study showed that the covering residents made serious mistakes six times more often than even fatigued residents. 