What causes a student to participate in a survey? This paper looks at survey response across multiple surveys to understand who the hard-core survey responders and non-responders are. Students at a selective liberal arts college were administered four different surveys throughout the 2002-2003 academic year, and we use the number of surveys participated in to understand how student characteristics such as demographics and personality affect cooperation. We find large attitudinal and behavioral differences between responders and non-responders. (Contains 4 tables and 1 figure.)