From the ad (bolding added):
Full-time research assistant position in the Department of Psychology. The position calls for work on two main aspects of research into the cognitive psychology of deductive and probabilistic reasoning: experiments and computer modeling. The experimental work includes helping in the design of experiments, carrying them out face-to-face or writing code to administer them on the Web, and coding and analyzing their results. The computational work includes helping in the development of programs that model human reasoning, i.e., writing code for certain functions (in Common Lisp). The work also includes making literature searches and helping in the preparation of manuscripts for publication.
ht: Rainer Joswig