title: Children's GPS-determined versus self-reported transport in leisure time and associations with parental perceptions of the neighborhood environment.
abstract: This study aimed to examine both GPS-determined and self-reported walking, cycling and passive transport in leisure time during week- and weekend-days among 10 to 12-year old children. Comparisons between GPS-determined and self-reported transport in leisure time were investigated. Second, associations between parental perceptions of the neighborhood environment and GPS-determined walking, cycling and passive transport in leisure time were studied.
  
  
  
  Children (10 to 12-years old; n = 126) wore a GPS device and an accelerometer for 7 consecutive days to assess objectively measured transport in leisure time and filled out a diary to assess self-reported transport in leisure time. Parents completed a questionnaire to assess parental perceptions of the neighborhood environment. Pearson correlations and t-tests were used to test for concurrent validity and differences between GPS-determined and self-reported transport in leisure time. Generalized linear models were used to determine the associations between the parental perceptions of the neighborhood environment and GPS-determined transport in leisure time.
  
  
  
  Overall, children under-reported their walking and cycling in leisure time, compared to GPS-determined measures (all p values <0.001). However, children reported their passive transport in leisure time during weekend days quite accurate. GPS-determined measures revealed that children walked most during weekdays (M = 3.96 trips/day; 26.10 min/day) and used passive transport more frequently during weekend days (M = 2.12 trips/day; 31.39 min/day). Only a few parental perceived environmental attributes of the neighborhood (i.e. residential density, land use mix access, quality and availability of walking and cycling facilities, and aesthetics) were significantly associated with children's GPS-determined walking, cycling or passive transport in leisure time.
  
  
  
  To accurately assess children's active transport in leisure time, GPS measures are recommended over self-reports. More research using GPS with a focus on children's transport in leisure time and investigating the associations with parental perceptions of the neighborhood environment is needed to confirm the results of the present study.
authors.affiliation: Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.
authors.forename: Griet
authors.initials: G
authors.lastname: Vanwolleghem
authors.affiliation: Research Unit for Active Living, Department of Sport Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.
authors.forename: Jasper
authors.initials: J
authors.lastname: Schipperijn
authors.affiliation: Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.
authors.forename: Freja
authors.initials: F
authors.lastname: Gheysen
authors.affiliation: Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium. Greet.Cardon@Ugent.be.
authors.forename: Greet
authors.initials: G
authors.lastname: Cardon
authors.affiliation: Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.
authors.forename: Ilse
authors.initials: I
authors.lastname: De Bourdeaudhuij
authors.affiliation: Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.|Research Foundation Flanders (FWO), Egmontstraat 5, 1000, Brussels, Belgium.
authors.forename: Delfien
authors.initials: D
authors.lastname: Van Dyck
mesh_terms: D061725:Accelerometry; D001642:Bicycling; D002648:Child; D003625:Data Collection / Q000592:standards*; D004779:Environment Design; D005260:Female; D040362:Geographic Information Systems; D015438:Health Behavior; D006801:Humans; D007899:Leisure Activities; D008297:Male; D010290:Parents / Q000523:psychology*; D012111:Residence Characteristics / Q000706:statistics & numerical data*; D012449:Safety; D057566:Self Report; D012959:Socioeconomic Factors; D013997:Time Factors; D014186:Transportation / Q000379:methods*; D016138:Walking
keywords: Children; GPS; Physical environment; Transport in leisure time