Brady J P, Berson J
Arch Gen Psychiatry. 1975 Nov;32(11):1449-52. doi: 10.1001/archpsyc.1975.01760290117014.
Fully right-sided stutterers (35) and fully right-sided nonstutterers (35) had a dichotic listening task to test hypotheses that stutterers have incomplete cerebral lateralization or reversed lateralization of speech function, or both. An assumption of the procedure is that a right-ear preference indicates left-cerebral dominance for speech. Six stutterers and no nonstutterers showed a reversal, ie, a left-ear preference. As a group, the remaining stutterers who showed no such reversal were the same as nonstutterers in the magnitiude of the right-ear preference. This suggests that a subset of stutterers may have an anomaly in the lateralization of speech functions. A nonsignificant tendency emerged for stutterers to show smaller between-ear differences on the test, consistent with the hypothesis that stutterers have less or incomplete lateralization of speech function than nonstutterers.
35名完全右侧口吃者和35名完全右侧非口吃者进行了一项双耳分听任务，以检验关于口吃者存在大脑语言功能侧化不完全或侧化逆转，或两者皆有的假设。该实验步骤的一个假设是右耳偏好表明左脑在语言功能上占主导地位。6名口吃者而非非口吃者表现出逆转，即左耳偏好。作为一个整体，其余未表现出这种逆转的口吃者在右耳偏好程度上与非口吃者相同。这表明一部分口吃者可能在语言功能侧化方面存在异常。口吃者在测试中表现出较小的双耳差异，这一趋势不显著，这与口吃者比非口吃者语言功能侧化程度更低或不完全的假设一致。
