Invisible Forces Exhibition: Using Evaluation to Improve an Exhibition

This paper presents the methodology and findings of an evaluation of the "Invisible Forces" exhibition at the California Museum of Science and Industry. The exhibit was designed to convey specific concepts related to electricity and magnetism, capture visitor interest for durations of 15 minutes or more of continuous use, be self-contained and comprehensible without reference to other exhibits or extensive text, and appeal to a broad range of ages and backgrounds.