Paper Sources


  • Bakker, P. 1987. "Autonomous Languages of Twins." In: Acta Genet Med Gemellol. 36(2). pp. 233-238.
  • Bishop, D.V.M. / Bishop, S.J. 1998. "Twin Language: A Risk Factor for Language Impairment?" In: JSLHR. 41. February 1998. pp. 150-160.
  • Burlingham, Dorothy. 1952. Twins: a Study of Three Pairs of Identical Twins. New York: International Universities Press.
  • Crystal, David. The Cambridge Encyclopedia of Language. Cambridge: Cambridge UP, 1987.
  • Dodd, Barbara / McEvoy, Sandra. 1994. "Twin Language or Phonological Disorder?" In: Journal of Child Language. 21(2). June 1994. pp. 273-289.
  • Friedrich,Walter. 1983. Zwillinge. Berlin: Deutscher Verlag der Wissenschaften.
  • Haworth, Claire M. A. / Davis, Oliver S. P. / Plomin, Robert. 2012. "Twins Early Development Study (TEDS): A Genetically Sensitive Investigation of Cognitive and Behavioral Development From Childhood to Young Adulthood." In: Research and Human Genetics. 16(1). October 2012. pp. 117-125.
  • Horwitz, Allan V. / Videon, Tami M. / Schmitz, Mark F. / Davis, Diane. 2003. "Rethinking Twins and Environments: Possible Social Sources for Assumed Genetic Influences in Twin Research." In: Journal of Health and Social Behavior. 44. June 2003. pp. 111-129.
  • Koch, Helen. 1966. Twins and Twin Relations. Chicago: University of Chicago Press.
  • Lackman, Jon. 2011. "Dugon, Haus You Dinikin, Du-Ah. The Secrets of Twin Speak." In: Slate Magazin. Article. August 2011.
  • Lichtenberger, Waldemar. 1965. Mitmenschliches Verhalten eines Zwillingspaares in seinen ersten Lebensjahren. München: Ernst Reinhardt Verlag.
  • Mahieu, Julie K. 2011. "Expressive Language Development in Twins Versus Singletons at Early School Age." Master's Thesis. School for Master of Arts in Speech and Hearing Science University of Illinois. Urbana, USA. March 2011.
  • Moilanen, I. / Linna, S.-L. / Ebeling, H. / Kumpulainen, K. / Tamminen, T. / Piha, J. / Almqvist, F. 1999. "Are Twins' Behavioural/Emotional Problems Different from Singletons?" In: European Child & Adolescent Psychiatry. 4(8). August 1999. pp. 62-67.
  • Oliver, Bonamy / Dale, Philip S. / Plomin, Robert. 2004. "Verbal and Nonverbal Predictors of Early Language Problems: an Analysis of Twins in Early Childhood Back to Infancy." In: Journal of Child Language. 31(3). August 2004. pp. 609-631.
  • Schüller, Maike. 2002. "The Language Acquisition of Twins and Twin Language." Seminar Paper. In: Grin: Publish and Find Knowledge. June 2002. pp. 2-16.
  • Stromswold, Karin. 2006. "Why Aren't Identical Twins Identical?: Genetic, Prenatal and Postnatal Factors." In: Cognition. 101. October 2006. pp. 333-384.
  • Weirich, Melanie. 2011. "The Influence of Nature and Nurture on Speaker-Specific Parameters in Twins Speech: Acoustics, Articulation and Perception." Ph.D. Thesis. Philosophische Fakult├Ąt II. Humboldt Universit├Ąt. Berlin, Germany. June 2011.
  • Wolf, I.J. 2013. "The Aetiology of Idioglossia." In: pp. 171-176.
  • Vratny-Smith, Lisa. 2010. "Identical Twins & Language Development." Article. In: Last Access: 15 May 2013


Internet Sources


  • [INT 1] Article on Cryptophasia
  • [INT 2] about Idioglossia
  • [INT 3] Article about Idioglossia
  • [INT 4] Wiki Article about Idioglossia
  • [INT 5] Globometer about Number of Twins in the World
  • [INT 6] Wiki Article about Cryptophasia


Picture Sources


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