title: Point-of-decision prompts for increasing park-based physical activity: a crowdsource analysis.
abstract: OBJECTIVE
  To examine the potential efficacy of using point-of-decision prompts to influence intentions to be active in a park setting.
  
  
  METHODS
  In June 2013, participants from across the U.S. (n=250) completed an online experiment using Amazon's Mechanical Turk and Survey Monkey. Participants were randomly exposed to a park photo containing a persuasive, theoretically based message in the form of a sign (treatment) or an identical photo with no sign (control). Differences in intentions to engage in moderate-to-vigorous physical activity within the park were examined between the two conditions for multiple gender, age, and race groups.
  
  
  RESULTS
  Participants who were exposed to the park photo with the sign reported significantly greater intentions to be active than those who viewed the photo without a sign. This effect was stronger for women and largely null for men, but no differences were observed across age or race groups.
  
  
  CONCLUSIONS
  Point-of-decision prompts are a relatively inexpensive, simple, sustainable, and scalable strategy for evoking behavior change in parks and further testing of diverse messages in actual park settings is warranted.
authors.affiliation: Department of Health Promotion, Education and Behavior, Prevention Research Center, Arnold School of Public Health, University of South Carolina, 915 Greene Street, Room 529, Columbia, SC 29208, USA. Electronic address: atkaczyn@mailbox.sc.edu.
authors.forename: Andrew T
authors.initials: AT
authors.lastname: Kaczynski
authors.affiliation: Department of Parks, Recreation and Tourism, School of Natural Resources, University of Missouri, 105 ABNR Building, Columbia, MO 65211, USA. Electronic address: sonjaws@missouri.edu.
authors.forename: Sonja A
authors.initials: SA
authors.lastname: Wilhelm Stanis
authors.affiliation: Brown School, Prevention Research Center, Washington University in St. Louis, One Brookings Drive, CB 1196, St. Louis, MO 63130, USA. Electronic address: ahipp@wustl.edu.
authors.forename: J Aaron
authors.initials: JA
authors.lastname: Hipp
mesh_terms: D000293:Adolescent; D000328:Adult; D063045:Crowdsourcing / Q000379:methods*; D003625:Data Collection; D004779:Environment Design; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010781:Photography; D011633:Public Facilities / Q000706:statistics & numerical data*; D011998:Recreation / Q000502:physiology; D014481:United States; D055815:Young Adult
keywords: Built environment; Crowdsourcing; Parks; Physical activity