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Tick, Nouchka T.; Van Der Ende, Jan; Koot, Hans M.; Verhulst, Frank C. – Journal of the American Academy of Child & Adolescent Psychiatry, 2007
Objective: The societal changes experienced by Western societies in recent decades have raised concerns about increases in the level of children's mental health problems. Although studies of secular changes in the prevalence of psychiatric diagnoses have indeed shown increases, their results may have been influenced by methodological problems,…
Descriptors: Check Lists, Medical Research, Emotional Disturbances, Hyperactivity