Using the Internet to Promote Health Behavior Change: A Systematic Review and Meta-analysis of the Impact of Theoretical Basis, Use of Behavior Change Techniques, and Mode of Delivery on Efficacy

Thomas Webb   ^{1 †} ;   Judith Joseph   ^{2 †} ;   Lucy Yardley   ^{2 †} ;   Susan Michie   ^{3 †}

¹ Department of Psychology, University of Sheffield, Western Bank, Sheffield, United Kingdom

² School of Psychology, University of Southampton, Southampton, United Kingdom

³ Research Department of Clinical, Educational, and Health Psychology, University College London, London, United Kingdom