Research abstracts
• These should address the role of digital interventions in health behaviour change and should clearly indicate the Rationale, Aims, Methodology (e.g. experiment, RCT, survey, interview study, think-aloud study, observational study), Analysis, Results and Conclusions. Unless there are good reasons not to, these should be used as headings.

• Abstracts involving primary research (rather than reviews or conceptual analyses) must have followed the appropriate standards of ethics in research and have received appropriate ethical approval.

• Data collection and analysis should be complete at time of submission. If not, authors will need to provide a persuasive case that the results will be available by the time of the conference.

• Conclusions must state the generalisable message resulting from the research reported. See this guidance on writing conclusions for abstracts: www.addictionjournal.org/pages/writing-the-abstract.

• Please use the Frontiers abstract system to submit.

Application abstracts
• These should include a description of what will be demonstrated and how the project/product was developed, tested and used.

• Innovative product descriptions or demonstrations may be included in a dedicated demonstration session depending on the number of submissions.

• Please use the Frontiers abstract system to submit.

Symposia abstracts

• These should describe a series of 'research abstracts' focused on a particular topic and will include a minimum of four oral presentations from different authors on a related topic.

• Submissions must state the convenor and a discussant to provide an overview and facilitate discussion.

• Please email your submission to jamie.brown@ucl.ac.uk using the subject line CBC DHC 2017 Submission.

Panel discussion/debate abstracts
• These should describe a proposed topic and will involve four contributors and a facilitator.

• The description should use the following headings: objectives, rationale and summary outlining the focus of each contributor's approach.

• Please use the Frontiers abstract system to submit.