Kristian Weihs: Science: Psychology: "An Evolutionary Approach Underlying Personal Construct Psychology (PCP): Herbert Spencer's assumption of an originally homogeneous universe and George Kelly's PCP".

Presented his current research at the XVth International Congress on Personal Construct Psychology at the University of Huddersfield, England in July 2003. The project explored the relationship between George Kelly's personal construct psychology and Herbert Spencer's evolutionary epistemological assumptions.