In October 2009, the LISS panel completed a questionnaire on general support for vigilantism, belief in a just world, and confidence in the justice system. This concerns the second measuring moment of the study 'Explaining Public Support for Vigilantism'. Panel members were assigned at random to one of two groups. This group assignment determined the order in which a panel member was presented three blocks of questions. The first group first answered questions about general support for vigilantism, then about belief in a just world, and finally about confidence in the justice system. The second group answered questions in the reverse order. In September 2009, the first questionnaire was administered to the same panel members that were selected for the second questionnaire.