• Save
10 hong kong_oct_2012
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share

10 hong kong_oct_2012

  • 359 views
Uploaded on

 

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
359
On Slideshare
359
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
0
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. AIMS Wearable cameras as potential criterion measure of activity type & context in free living scenarios... Its worthwhile walking down the corridor to your computer science department...British Heart FoundationHealth Promotion Research Group
  • 2. British Heart FoundationHealth Promotion Research Group
  • 3. CLARITY Centre, DublinSocial/Agency Collaborators Industry Collaborators CSET Core
  • 4. Microsoft
  • 5. Behavioural Epidemiology Framework links between physical activity &health Translate Identify Test into correlates interventions practice Measure physical activitySallis & Owen, 1999
  • 6. If you cannot measure it, you cannot improve it...Lord Kelvin
  • 7. Maybe we should look for some ideas in computer science domain...British Heart FoundationHealth Promotion Research Group
  • 8. Self report is limited... Recall error... Comprehension problems... Social desirability error...Kelly, IJBNPA 2011, 8:44Armstrong, Sprts Med 06, 36:1067–1086
  • 9. Accelerometers != behaviour Accelerometers measure activity levels but not behaviours...British Heart FoundationHealth Promotion Research Group
  • 10. % adults meeting physical activity recommendations … from same study! Self report : 50% Accelerometer: 5% Self-report : 38% Accelerometer: 5%USA NHANES: Toiano et. al., 2008HSE: 2009
  • 11. GPS also has limitations... GPS + GIS doesnt measure at-the- moment context...British Heart FoundationHealth Promotion Research Group
  • 12. GIS doesnt live in-the-moment... GPS + GIS doesnt measure at-the- moment context...British Heart FoundationHealth Promotion Research Group
  • 13. GPS + GIS doesnt measure at-the- moment context...British Heart FoundationHealth Promotion Research Group
  • 14. Maybe we should look for some ideas in computer science domain...British Heart FoundationHealth Promotion Research Group
  • 15. Photos supporting diet recall...Arab, Eu J Clin Nutr 2011;65(10):1156–62
  • 16. Mann, Computer 1997, 30; 25-32Tano, ICME conf 2006; 649-652
  • 17. Autographer
  • 18. Android phoneQiu, Multimedia Modelling Conf. 2012
  • 19. Google Glass
  • 20. SenseCamSenseCamHodges, Ubicomp conf., 2006
  • 21. Day in the life of video...SenseCamHodges, Ubicomp conf., 2006
  • 22. Ethics ok SenseCamBritish Heart FoundationHealth Promotion Research Group
  • 23. SenseCam & Active travel...Active TravelU.K. National Travel Survey
  • 24. Journey time = 20 minutesKelly, IJBNPA 2011, 8:44
  • 25. Journey time = 12 min 38 secKelly, IJBNPA 2011, 8:44
  • 26. Self-report error in adults travel... Car +2 min 08 sec (S.E. 60 sec) Walk +1 min 41 sec (S.E. 45 sec) All journeys +2 min 34 sec Bike +4 min 33 sec (S.E. 64 sec) (S.E. 32 sec)Kelly, IJBNPA 2011, 8:44
  • 27. test Then show Paul Journey2School...Kelly, 2012, Am J Prev Med 43(5), 546 – 550
  • 28. AdolescentsBias of +10 seconds per journey (95%CI -33 to +53)Limits of agreement ~ 16.5 minutes....Kelly, 2012, Am J Prev Med 43(5), 546 – 550
  • 29. test Then show Paul Journey2School...Kelly, 2012, Am J Prev Med 43(5), 546 – 550
  • 30. SenseCam & accelerometer... Activity Type = ?? Context = ?? Actical MVPA Threshold Journey background minutes time = 20British Heart FoundationHealth Promotion Research Group
  • 31. backgroundDoherty, Lancet conf. 2012 (in press)
  • 32. backgroundDoherty, Lancet conf. 2012 (in press)
  • 33. Doherty, Lancet conf. 2012 (in press)
  • 34. Can SenseCam images identify accelerometer episodes? 79% of episodes could be coded (n=311) - 14% had no associated image data (n=57) - 3% unsure of activity from images (n=10) - 2% images too dark to code (n=7)Doherty, Lancet conf. 2012 (in press)
  • 35. Can SenseCam classify accelerometer episodes by activity type and context? 311 episodes coded - 12 PA Compendium categories identified - 114 PA compendium subcategories identified 59% outdoors, 39% indoors 33% leisure time, 33% transportation, 18% domestic, 15% occupational 45% episodes non-social, 33% direct social, 22% social/not-engagedDoherty, Lancet conf. 2012 (in press)
  • 36. Activity type...Doherty, Lancet conf. 2012 (in press)
  • 37. Activity context...Doherty, Lancet conf. 2012 (in press)
  • 38. Data mangement of images? 1.8 million images for single study: - 150 participants - 6 days of travel - 2000 images per dayBritish Heart FoundationHealth Promotion Research Group
  • 39. Sitting accelerometer signalBritish Heart FoundationHealth Promotion Research Group
  • 40. Walking accelerometer signalBritish Heart FoundationHealth Promotion Research Group
  • 41. Driving accelerometer signalBritish Heart FoundationHealth Promotion Research Group
  • 42. Pattern recognition...SenseCamHodges, Ubicomp conf., 2006
  • 43. FUTURE OF WEARABLE CAMEARAS IN HEALTH ?British Heart FoundationHealth Promotion Research Group
  • 44. NEW CRITERION MEASURE OF EXPOSURE TO LIFESTYLE BEHAVIOURS IN FREE-LIVING SCENARIOS... AND THE SOCIAL & ENVIRONMENTAL CONTEXT IN WHICH THEY OCCUR...British Heart FoundationHealth Promotion Research Group
  • 45. Existing pattern recognition studies only trained in the lab... Better behaviour identification critical in cross-section & longitudinal studies...Staudenmayer, MSSE 2012;44:S61-S67Zhang, Med Sci Sports Exerc. 2012;44:742-8
  • 46. Behavioural Epidemiology Framework links between physical activity &health Translate Identify Test into correlates interventions practice Measure physical activitySallis & Owen, 1999
  • 47. test backgroundBritish Heart FoundationHealth Promotion Research Group
  • 48. Engaging images help motivation? Behavioural epi framework again...Browne, Memory 2011; 19(7); 713-722St. Jacques, Memory 2011;19(7);713-722
  • 49. Facilitating self-efficacy? Behavioural epi framework again...Bauman, Lancet 2012; 380; 258-271
  • 50. Identifying opportunities?Healy, Diabetes Care 2008Linden, IEEE Inet Comp 2003;7(1);76- 80
  • 51. In summary... - Wearable cameras are becoming a useful criterion measure - In future they may facilitate behaviour change MAKE SURE TO VISIT YOUR COMPUTER SCIENCE AND ENGINEERING DEPARTMENTS!British Heart FoundationHealth Promotion Research Group