The validity of children's self-reported exposure to traffic

Abstract

This paper reports on a series of studies of the validity of children's self-reported exposure to traffic. The studies were conducted within a larger case-control study carried out in the metropolitan area of Perth, Western Australia. For these validity studies, subjects were randomly selected from the original pool of case (n = 100) and control (n = 400) subjects. Three techniques were used to assess the validity of the self-reported 'habitual exposure', namely, the 'moving observer' technique, pedestrian diaries, and a test of construct validity. The child's regular walking activities during the course of a typical week was considered the child's 'habitual exposure'. The 'moving observer' ..