Vrtunski P B, Mack J L, Boller F, Kim Y
Cortex. 1976 Dec;12(4):395-404. doi: 10.1016/s0010-9452(76)80043-3.
The effect of delayed auditory feedback (DAF) on the performance of verbal and nonverbal tasks at two levels of difficulty by patients with left or right hemispheric lesions and non brain-damaged controls was compared. All subjects showed DAF effects, as measured by increases in response duration and intensity. While controls showed an increase in DAF effects as a function of increased task difficulty, the brain-damaged patients failed to show such an increase on tasks on which they were presumably impaired (verbal tasks for lefts, nonverbal for rights). Findings suggest a clear dissociation between DAF effects in unilateraly lesioned patients due to the nature of the stimulus material and its difficulty level.
比较了延迟听觉反馈（DAF）对左半球或右半球病变患者以及非脑损伤对照者在两种难度水平的言语和非言语任务表现的影响。所有受试者均表现出DAF效应，通过反应时长和强度的增加来衡量。虽然对照组的DAF效应随任务难度增加而增强，但脑损伤患者在他们可能受损的任务（左脑损伤患者的言语任务，右脑损伤患者的非言语任务）上并未表现出这种增加。研究结果表明，由于刺激材料的性质及其难度水平，单侧病变患者的DAF效应之间存在明显分离。
