The Family Affluence Scale was used as a proxy for respondents’ socioeconomic status (SES) (Currie et al., 2008). This validated measure of SES was composed of four questions. Participants were asked “How many computers does your family own?” “Do you have your own bedroom for yourself?” “Does your family own a car, van or truck?” and “During the past 12 months, how many times did you travel away on vacation with your family?” The resulting scale was further divided into tertiles, to reflect low, medium and high socioeconomic status.
