Background/objective: Sluggish Cognitive Tempo (SCT) is an attentional disorder characterized by the symptoms of slowness in behavior or thinking, a lack of en.ergy, difficulty initiating and sustaining effort, daydreaming, and drowsiness. The aim of the present study was to investigate the distinctive attentional characteristics of SCT as compared to Attention-Deficit/Hyperactivity Disorder (ADHD). Method: A total of 110 adults were recruited and divided into four groups: SCT+ADHD, SCT, ADHD, and healthy controls. The Revised version of Attention Networks Test was used to investigate each group’s attentional profile. Results: The results revealed that the two SCT groups (SCT+ADHD and SCT) showed a significantly weaker orienting network due to the problems of engaging and disengaging attention than the other two groups. Additionally, the two ADHD groups (SCT+ADHD and ADHD) showed a significantly weaker executive control network than the other two groups. Conclusions: The findings demonstrate an attentional distinction between the SCT and the ADHD groups with a greater dysfunction in the orienting network in the SCT group as compared to the ADHD group. Furthermore, a greater executive control dysfunction was observed in the ADHD group as compared to the SCT group.

背景/目的：缓慢的认知节奏（SCT）是一种注意力障碍，其特征是行为或思维缓慢，精力不足，难以发起和维持努力，做白日梦和嗜睡。本研究的目的是研究与注意力缺乏/多动障碍（ADHD）相比，SCT的独特注意力特征。方法：共招募110名成年人，将其分为SCT + ADHD，SCT，ADHD和健康对照组四组。修订版的注意力网络测试用于调查每个小组的注意力状况。结果：结果显示，与其他两组相比，由于吸引和脱离注意力的问题，两个SCT组（SCT + ADHD和SCT）显示出明显较弱的定向网络。此外，两个ADHD组（SCT + ADHD和ADHD）显示出比其他两个组明显弱化的执行控制网络。结论：研究结果表明，与ADHD组相比，SCT和ADHD组之间存在注意区别，SCT组的定向网络功能障碍更大。此外，与SCT组相比，ADHD组观察到更大的执行控制功能障碍。