Increasingly, funders of education and rehabilitation programs are demanding that those programs incorporate evidence-based practices into their work with students and clients. It seems reasonable to insist that the interventions that are used by practitioners are based on scientific studies that have demonstrated their effectiveness. Too often, however, in the field of services for individuals with visual impairments, we have relied on practices that are based on tradition and professional beliefs of what might work. It is not that the field has an aversion to using scientific evidence but rather that this situation is related to the limited number of intervention studies from which such an evidence base is founded.

中文翻译：

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建立证据基础，一次进行一项研究

教育和康复计划的资助者越来越多地要求这些计划将基于证据的做法纳入与学生和客户的合作中。坚持认为从业人员使用的干预措施是基于已证明其有效性的科学研究看来是合理的。但是，在为视障人士提供服务的领域中，我们经常依赖于基于传统和可能可行的专业信念的做法。这并不是说该领域不愿使用科学证据，而是这种情况与建立这样的证据基础的干预研究数量有限有关。