Abstract
The application of self-reports of traffic accidents is increasing within traffic safety work and research, yet many of the methodological aspects related to self-reporting are unknown. This thesis examines the correctness of self-reported information and its congruency with police reports of the same traffic accidents. The effect of various sampling methods and survey designs on e.g. response rates and the demographic composition of respondents is furthermore investigated. The thesis also presents ideas for the possible application of the self-report methodology within the area of traffic safety as well as highlighting fields of application where self-reports should not be deployed. (Author/publisher)