Clin Genet. 1999 Dec;56(6):447-9.

Relation of mathematical ability to psychosis in Iceland.

Karlsson JL.

Institute of Genetics, Reykjavik, Iceland.

A study of mathematically gifted Icelanders demonstrates an increased risk of mental illness in their ranks. Psychotic disorders are also frequent among their relatives. Linkage of academic records with previously published data on the family distribution of psychosis reveals a pattern compatible with the hypothesis that high arousal plays a role in reasoning ability.