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The Society for Mathematical Psychology promotes the advancement and communication of research in mathematical psychology and related disciplines. Mathematical psychology is broadly defined to include work of a theoretical character that uses mathematical methods, formal logic, or computer simulation. The Society journal is the Journal of Mathematical Psychology.

Thaddeus Cowan, a longtime member and SMP Secretary-Treasurer from 1996 to 2002, died on June 7, 2012 at the age of 77. Thad was retired from Kansas State University (KSU) and was living in Bozeman, MT. In addition to KSU, Thad taught at the University of Connecticut, Albion College, Oklahoma State University and Weber State University. Thad was the primary organizer of the 2003 SMP meeting that was held at Weber State University in Ogden, Utah. Thad is remembered for his brilliant papers and talks, his distinctive laugh, his infectious enthusiasm, his expansive curiosity, and his valuable service to the field of mathematical psychology. Among his contributions, Thad used topology to show how people interpret impossible figures like those of artist M.C. Escher--two-dimensional representations that could never be reproduced in three dimensions. Thad also used mathematical braid theory to turn the Penrose triangle inside-out. In another paper, Thad used mathematical catastrophe theory to model approach-approach and avoidance-avoidance conflicts. Thad will be missed by his many friends in SMP.