{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T11:08:43Z","timestamp":1782385723876,"version":"3.54.5"},"reference-count":48,"publisher":"SAGE Publications","issue":"8","license":[{"start":{"date-parts":[[2016,11,25]],"date-time":"2016-11-25T00:00:00Z","timestamp":1480032000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Atten Disord"],"published-print":{"date-parts":[[2017,6]]},"abstract":"<jats:p>Objective: This study evaluated whether sluggish cognitive tempo (SCT) is separable from ADHD\u2013inattention (IN) and uniquely associated with internalizing dimensions in preschool children in South Korea. Method: Mothers of 172 preschool children (ages 4-6 years; 52% girls) rated children\u2019s SCT, ADHD-IN, ADHD\u2013hyperactivity\/impulsivity (HI), oppositional defiant disorder (ODD), aggression, emotional reactivity, anxiety\/depression, somatic complaints, withdrawal, and sleep problems. Results: Eight of 10 SCT symptoms showed convergent and discriminant validity with ADHD-IN. ADHD-IN remained significantly positively associated with ADHD-HI, ODD, and aggressive behavior after controlling for SCT, whereas SCT was no longer positively associated with these externalizing behaviors after controlling for ADHD-IN. Both SCT and ADHD-IN were uniquely associated with greater emotionally reactivity, anxiety\/depression, and withdrawal. Only SCT was uniquely associated with somatic complaints, and only ADHD-IN was uniquely associated with sleep problems. Conclusion: Findings replicate results with children and adolescents, thus expanding evidence for the validity of SCT in early development.<\/jats:p>","DOI":"10.1177\/1087054716680077","type":"journal-article","created":{"date-parts":[[2016,11,25]],"date-time":"2016-11-25T20:10:25Z","timestamp":1480104625000},"page":"623-631","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":33,"title":["Can Sluggish Cognitive Tempo Be Distinguished From ADHD Inattention in Very Young Children? Evidence From a Sample of Korean Preschool Children"],"prefix":"10.1177","volume":"21","author":[{"given":"SoYean","family":"Lee","sequence":"first","affiliation":[{"name":"Sookmyung Women\u2019s University, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G. 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