1. 1Psychology, Northwestern University, 2029 Sheridan Road, Evanston, Illinois 60208-2710; b-jee@northwestern.edu
2. 2duttal@northwestern.edu
3. 3gentner@northwestern.edu
4. 4Science Education Resource Center, Carleton College, Northfield, MN 55057; cmanduca@carleton.edu
5. 5Department of Psychology, Temple University, Weiss Hall, 1701 N 13th Street Philadelphia, Pennsylvania 19122; tshipley@temple.edu
6. 6Department of Geosciences, University of Wisconsin, 1215 West Dayton St, Madison, WI 53706-1692; basil@geology.wisc.edu
7. 7Science Education Resource Center, Carleton College, Northfield, MN 55057; cormand@carleton.edu
8. 8Department of Earth and Planetary Sciences, Northwestern University, 1850 Campus Dr. Evanston, Illinois 60208-2150; brad@earth.northwestern.edu