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Causes of Developmental Disorders
Karmiloff, Annette. "Development itself is key to understanding developmental disorders". Page 1. Published October 1, 1998. Retrieved on November 26, 2011 from: http://www.sciencedirect.com/science/article/pii/S1364661398012303 Karmiloff, Annette. "Development itself is key to understanding developmental disorders". Page 1. Published October 1, 1998. Retrieved on November 26, 2011 from: http://www.sciencedirect.com/science/article/pii/S1364661398012303

One theory that supports environmental causes of developmental disorders is one that involves stress in early childhood. Researcher and child psychiatrist Bruce D. Perry, M.D., Ph.D, theorizes that Perry, Bruce D. and Szalavitz, Maia. "The Boy Who Was Raised As A Dog", Basic Books, 2006, p.2. ISBN: 9780465056538 In his works he compares Perry, Bruce D. and Szalavitz, Maia. "The Boy Who Was Raised As A Dog", Basic Books, 2006, p.2.] Other stress theories suggest that even Payne, Kim John. “Simplicity Parenting: Using the Extraordinary Power of Less to Raise Calmer, Happier, and More Secure Kids”, Ballantine Books, 2010, p. 9.ISBN: 9780345507983.