As an added control, Mackey and his team also asked the students to complete a mental task, to make sure that merely paying attention to the picture wasn't confounding his results.
另外一项控制Mackey博士和他的小组也要求被测学生完成一项精神任务，以确保光把精力投入到照片上不会混淆他的结果。
As an added control, Mackey and his team also asked the students to complete a mental task, to make sure that merely paying attention to the picture wasn't confounding his results.
另外一项控制Mackey博士和他的小组也要求被测学生完成一项精神任务，以确保光把精力投入到照片上不会混淆他的结果。
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