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JITAI stands for Just-in-time adaptive Interventions (
NAH16)
Florian Künzler
1
, Jan-Niklas Kramer
2
, Varun Mishra
3
, Bastien Presset
4
,
Shwana N. Smith
5
, David Kotz
3
, Urte Scholz
6
, Elgar Fleisch
1,2
& Tobias Kowatsch
2
1 ETH Zurich, 2 University of St.Gallen, 3 Dartmouth College, 4 University of Lausanne, 5 University of Michigan, 6 University of Zurich
Ally: A Smartphone-based
Physical Activity Intervention
1. Background
No behavior has an impact on human health as great
as physical activity (PA). We therefore developed
Ally, a smartphone-based 6-week PA intervention.
Ally seeks to exploit the ubiquity and sensing
capabilities of mobile phones to adapt the provision
of PA interventions to the context of the user.
2. Research Questions
(1) What are effective components of Ally, a mHealth
physical activity intervention?
(2) Can mobile sensor data predict opportune
moments for interventions?
3. JITAI Framework
4. Ally Field Study
5. Recruitment Process
We conduct a longitudinal factorial experiment to test
intervention components and collect a variety of sensor data.
References
Florian Künzler, Jan-Niklas Kramer & Tobias Kowatsch (2017) Efficacy of mobile context-aware n otification management systems: A
systematic literature review and met a-analysis", 2017 IEEE 13th Intern ational Conference on Wireless and Mobile Comp uting,
Networking and Communications (WiMob), 131-138, doi:10.1109/WiMOB.2017.8115839
Nahum-Shani, I., S. N. Smith, B. J. Spring, L. M. Collins, K. Witkiewitz, A. Tewari & S. A. Murphy (2016). "Just-in-Time Adaptive
Interventions (JITAIs) in Mob ile Health: Key Components and Design Principles for Ongoing Health Behavior Support." Annals of
Behavioral Medicine, ePrint ahead doi:10.1007/s12160-016-9830-8.
Lucerne | December 4 | 2017CSS Meets & Greets CDHI
Partner
State of vulnerability
and opportunity
State of receptivity
JITAI
Proximal
Outcome
Distal
Outcome
Invitations sent to
N = 30.000 CSS customers
n = 749 (2.5%)
clicked the invitation link
n = 311 (42%)
completed T1 survey
n = 273 (88%)
registered in the Ally system
n = 55 not eligible
n = 321 declined to participate
n = 62 dropped out
n = 191
gave reasons for not participating