Some formal qualities of obsessional thinking.
D000293:Adolescent; D000328:Adult; D001007:Anxiety; D003071:Cognition; D003657:Decision Making; D004644:Emotions; D005260:Female; D006184:Habits; D006801:Humans; D008297:Male; D009771:Obsessive-Compulsive Disorder; D011582:Psychological Theory; D013850:Thinking