Reparation difficulty was manipulated by varying required signature counts of 5, 50, or 100.
Evidence
In order to manipulate the diffi culty of making reparations, we varied the number of signatures the participants would be asked to collect before they could return the petition. Participants read that they would need to collect 5, 50, or 100 signatures in the low, moderate, and high diffi culty conditions, respectively. Participants in the control condition read nothing about the petition, thus, the diffi culty of making reparations in this condition was ambiguous. — Michael T. Schmitt, Daniel A. Miller, Nyla R. Branscombe, and Jack W. Brehm, The Difficulty of Making Reparations…, 51