• Jan Dirk Blom


The term kalopsia comes from the Greek words kakos (bad, unpleasant) and opsis (seeing). It is used to denote a negative affective connotation of sensory, illusory, and hallucinatory phenomena, in the sense that these are perceived as ugly, sinister, and/or menacing. The term kakopsia is used in opposition to *kalopsia (i.e. seeing things as beautiful, friendly, and/or comforting).


Greek Word Illusory Movement Kinetic Depth Effect Piper Methysticum German Psychiatrist 
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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Jan Dirk Blom
    • 1
  1. 1.Parnassia Bavo Group & University of GroningenThe HagueThe Netherlands

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