Lists were presented in four randomised orders and participants were sequentially assigned to a list order. For CL, lists were presented on screen as a 2-column table with a check box next to each item. On each screen, the research question was visible, along with the progression of responses so that participants could see the series of answers that led them to the current screen. For the PL, printed lists of the attributes, consequences and values were provided to each respondent to accompany the ‘‘charts’’.