Predicting data quality of proxy reports in egocentric network studies

Egocentric network studies and many general population surveys rely on proxy reports about network contacts of study participants that are asked in name interpreter questions. A central concern is the extent to which proxy reports match the answers these contacts would give themselves if they would be directly interviewed. Based on the theory of survey satisficing, the present research proposes a theoretical framework that allows predicting when proxy reports are likely to match self-reports. Congruence is higher if respondents possess the motivation and ability to answer a proxy question effortfully, and if the task is not too difficult. Moreover, the theory of survey satisficing states that motivation, abilities, and task difficulty are not independent of each other, which provides an explanation for inconsistent findings in the literature. Results from two egocentric network studies study among German adults (N = 756) and among Dutch middle school students (N = 679), in which network contacts were also interviewed, are in line with these hypotheses. Design recommendations for egocentric network studies are provided.