Department of Psychology, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
Brain Cogn. 2011 Nov;77(2):215-22. doi: 10.1016/j.bandc.2011.08.007. Epub 2011 Sep 13.
In the present experiment, we used search asymmetry to test whether the sustained attention to response task is a better measure of response inhibition or sustained attention. Participants performed feature present and feature absent target detection tasks using either a sustained attention to response task (SART; high Go low No-Go) or a traditionally formatted task (TFT; high No-Go low Go) response format. In addition to performance, we employed functional near infrared spectroscopy (fNIRS) to measure lateral cerebral oxygenation levels and self-reports of Tense Arousal, Energetic Arousal, task related and unrelated thoughts occurring during the tasks. Detections were lower and reaction times longer in the feature absent search than the feature present search regardless of response format. Detections were lower, but reaction times shorter in the SART than the TFT regardless of feature search. Greater right than left frontal hemisphere activation occurred in the SART than the TFT. In addition, the SART was more fatiguing based on self-reports than the TFT, but there were no differences in Task-Unrelated Thoughts across task conditions. Overall, the results suggest the SART places high response inhibition, not necessarily sustained attention, demands on participants.
在本实验中，我们使用搜索不对称性来测试持续注意反应任务是否是反应抑制或持续注意的更好衡量标准。参与者使用持续注意反应任务（SART；高 Go 低 No-Go）或传统格式任务（TFT；高 No-Go 低 Go）反应格式执行特征存在和特征不存在目标检测任务。除了表现，我们还使用功能近红外光谱（fNIRS）来测量侧脑氧合水平以及在任务期间发生的紧张唤醒、精力唤醒、与任务相关和不相关的思维的自我报告。无论响应格式如何，在特征不存在搜索中，检测结果都较低，反应时间都较长。在 SART 中，检测结果较低，但反应时间比 TFT 短，无论特征搜索如何。与 TFT 相比，SART 中右前额叶半球的激活程度大于左前额叶半球。此外，与 TFT 相比，SART 根据自我报告更疲劳，但任务条件之间没有任务无关思维的差异。总的来说，结果表明 SART 对参与者提出了高反应抑制的要求，而不是持续注意。
