This study evaluated the internal and external validity of self-report and parent-report measures of sluggish cognitive tempo (SCT) in South Korean adolescents. Adolescents (N = 469, ages 13–17 years; 50.2% boys) completed self-report measures of SCT and attention-deficit/hyperactivity disorder inattention (ADHD-IN) in addition to measures of internalizing and externalizing psychopathology, social problems, and grades. Parents rated adolescents on SCT, ADHD-IN, internalizing and externalizing psychopathology, and social problems. Using adolescent self-report, 11 of 15 SCT symptoms showed convergent and discriminant validity with ADHD-IN. Using parent-report, all 15 SCT symptoms showed convergent and discriminant validity with ADHD-IN. For within source analyses, SCT showed unique and stronger associations than ADHD-IN with internalizing psychopathology whereas ADHD-IN showed unique and stronger associations than SCT with externalizing psychopathology. SCT and ADHD-IN showed similar unique associations with social problems, whereas ADHD-IN was more strongly related than SCT to grades. Across source analyses also supported the differential unique associations of SCT and ADHD-IN with internalizing and externalizing psychopathologies. This study provides initial evidence for the internal and external validity of SCT with South Korean adolescents, extending support for the transcultural validity of SCT to the important developmental period of adolescence.

这项研究评估了韩国青少年自我报告速度和父母报告速度缓慢的认知节奏（SCT）的内部和外部有效性。青少年（N = 469，年龄13-17岁；50.2％的男孩）除了将心理病理学，社会问题和年级内部化和外部化的措施外，还完成了SCT和注意力缺陷/多动障碍注意力缺乏症（ADHD-IN）的自我报告措施。父母对青少年的SCT，ADHD-IN，内在和外在的心理病理学以及社会问题进行了评估。使用青少年自我报告，在15种SCT症状中，有11种表现出ADHD-IN的收敛性和判别力。使用父母报告，所有15种SCT症状在ADHD-IN中均显示出收敛性和判别性。对于源内分析，SCT与内在性精神病理学相比，显示出比ADHD-IN独特且更强的关联，而ADHD-IN与内在性心理病理学显示比SCT独特且更强的关联。SCT和ADHD-IN与社会问题表现出相似的独特关联，而ADHD-IN与SCT与年级之间的关联更紧密。跨源分析还支持SCT和ADHD-IN与内部和外部心理病理学之间的独特区别联系。这项研究为韩国青少年SCT的内部和外部有效性提供了初步证据，将对SCT跨文化有效性的支持扩展到了青少年的重要发育时期。