Stephen von tetzchner biography

Stephen von tetzchner

Jon Stephenson von Tetzchner (Icelandic: Jón; born 29 August in Seltjarnarnes) is an Icelandic-Norwegian programmer and businessman.

Professor of developmental psychology and school psychology at the Department of Psychology, University of Oslo, Norway.

My research covers different areas of development, with particular emphasis on the development of communication and language.

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