Impact of Length or Relevance of Questionnaires on Attrition in Online Trials: Randomized Controlled Trial

• Main Authors: McCambridge, Jim (Author), Kalaitzaki, Eleftheria (Author), White, Ian R (Author), Khadjesari, Zarnie (Author), Murray, Elizabeth (Author), Linke, Stuart (Author), Thompson, Simon G (Author), Godfrey, Christine (Author), Wallace, Paul (Author)
• Format: Book
• Published: JMIR Publications, 2011-11-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

BackgroundThere has been limited study of factors influencing response rates and attrition in online research. Online experiments were nested within the pilot (study 1, n = 3780) and main trial (study 2, n = 2667) phases of an evaluation of a Web-based intervention for hazardous drinkers: the Down Y...