Assistant Professor, Psychology: Univeristy of Pennsylvania
Assistant & Associate Professor, Psychology and by courtesy Computer Science: Georgia Institute of Technology
Visiting Scholar: Stanford, 2000-present (CSLI)
Cognitive Scientist (part time), Visiting Researcher: Palo Alto Research Corportation, 2005 present.
Senior Research Scientist, Research Associate: Institute for the Study of Learning and Expertise, 2001-present.


B.A. Psychology: Earlham College.
Ph.D. Psychology [Experimental & Developmental]: University of Michigan.