PROFILE Deborah Perry Director Selinda Research Associates, Inc. About informal science Projects Take Two: A Study of the Co-creation of Knowledge on Museum Web 2.0 Sites DIG: Scientists in Alaska's Scenery Research Informal Geoscience Education on a Grand Scale: The Trail of Time Exhibition at Grand Canyon Beyond Cognition and Affect The Exploration Zone at The Field Museum: Front-End Evaluation The Informal Learning Program at the Chapin Hall Center for Children at the University of Chicago President's Message: What On Earth Is Going On? The Museum Impact and Evaluation Study: A Study of Relationships The Museum Impact and Evaluation Study: How Visitors Relate to Science and Technology Museums Measuring Learning With the Knowledge Hierarchy Evaluation Experiment Benches: Summative Evaluation Report “Oh my goodness. The whole thing is about ratios!” A longitudinal summative evaluation of visitor experiences in four Math Moves! exhibitions. Science from the Start: Final Evaluation Summary A Summative Evaluation of Visitors' Gallery Experiences at The Detroit Institute of Arts Hunters of the Sky Summative Evaluation Report DIG: Scientists in Alaska's Scenery - Frontier Scientists Summative Evaluation Report Summative Evaluation of the Trail Of Time at Grand Canyon National Park for University of New Mexico Summative Evaluation of Geometry Playground for The Exploratorium Web 2.0 at the Museum of Life and Science: Final Report for the Take Two Institutional Research Study at the University of Washington Summative Evaluation of POLAR-PALOOZA Underground Adventure