There is a rich history of experimentation to understand the effects of incentives on the decision to cooperate with a survey request. However, few studies have used a full factorial design to simultaneously test the impacts of both the value of a noncontingent incentive and the value of a contingent incentive. Furthermore, there is little reported on the effects of these two forms of incentives when used to build a new measurement panel from an existing panel. Our paper will report the findings of a pilot study conducted by Knowledge Networks, in which national random sample of 400 households was drawn from KnowledgePanel®, Knowledge Networks’ probabilitybased online panel. These households were invited to participate in a multi-media measurement panel. A noncontingent incentive was given to all sampled households – a $2 bill mailed in a brief letter alerting the households they were chosen for the new study. The following week a formal invitation to join the new study was mailed, in which the households received either a (noncontingent) $5 or $10 cash incentive. The letter also promised the respondents that if they joined the new panel they would receive a (contingent) incentive of either $10 or $25 each month they remained in the panel. We will discuss the main effects and interaction effects on cooperation metrics (i.e., our dependent variables) in the experiment, including how a set of demographic and psychographic variables (i.e., covariates) known about each of the 400 households mediated these effects. We also will report findings from a follow-up survey, conducted after the recruitment period for the new panel ended, in which 76% of the 400 invited households completed a detailed questionnaire about their motives for wanting (or not) to participate in the new panel, including the role the incentives offered played in their final decision.