1. Department for Developmental Psychiatry, Psychotic Disorders and Old Age Psychiatry, Medical University of Gdansk, Gdansk, Poland
2. Institute of Psychology, University of Gdansk, Gdansk, Poland
3. Andrzej Frycz Modrzewski Cracow University, Cracow, Poland and Center for Cognition and Communication, New York, N.Y., U.S.A.