Ballinger C T, Varley C K, Nolen P A
Am J Psychiatry. 1984 Dec;141(12):1590-3. doi: 10.1176/ajp.141.12.1590.
Effects of methylphenidate on measures related to reading were studied in a group of nine boys who had attention deficit disorder with hyperactivity; a double-blind crossover design using active drug and placebo was used. Administration of methylphenidate improved subjects' performance on language processing tests but not their performance on oral reading measures. The findings provide evidence in support of a two-factor theory of attention deficit disorder.
对一组九名患有注意力缺陷多动障碍的男孩，研究了哌甲酯对与阅读相关指标的影响；采用了使用活性药物和安慰剂的双盲交叉设计。服用哌甲酯改善了受试者在语言处理测试中的表现，但在朗读指标方面没有改善。这些发现为支持注意力缺陷障碍的双因素理论提供了证据。
