NCT04787913

An Evaluation of a Dynamic Web-Based Visualization of Community Immunity

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 5,516 (actual)
• Sponsor: Laval University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

This study is a PhD project conducted by Ms. Hina Hakim, supervised by Dr. Holly O. Witteman, PhD, and co-supervised Dr. Daniel Reinharz, professors and researchers at the Faculty of Medicine at Laval University. The purpose of this study is to evaluate the effects of visualization conveying the concept of community immunity or herd immunity on risk perception (towards individual, family, community and vulnerable people in communities) (primary outcome) and on emotions, attitudes, knowledge, and behavioural intentions (secondary outcomes).

Detailed description

Visualization is a powerful communication mechanism that uses pre-attentive processing to communicate large amounts of information rapidly in understandable and compelling ways (Healey and Enns 2012). A systematic review demonstrates that there are some interventions available for conveying the concept of community immunity, and very few evaluate interventions for their effects on vaccine intentions and uptake as well as their precursors, such as knowledge, attitudes, knowledge and none on emotions (Hakim et al. 2018). The purpose of this study is to evaluate the effects of visualization conveying the concept of community immunity on risk perception (to individual, family, community and vulnerable people in communities) (primary outcome) and on emotions, attitudes, knowledge, and behavioural intentions (secondary outcomes).

Conditions

• Vaccine-Preventable Diseases

Interventions

Type	Name	Description
BEHAVIORAL	herdimm	In this visualization participants can build their own avatar representing themselves and 8 other avatars representing people around them, like their family or coworkers. Our visualization then uses these avatars in a brief narrated video explaining how herd immunity works.
BEHAVIORAL	guardianmeasles	A screen capture of an interactive visualization: https://www.theguardian.com/society/ng-interactive/2015/feb/05/-sp-watch-how-measles-outbreak-spreads-when-kids-get-vaccinated
BEHAVIORAL	theotheredmundmeasles	A gif showing measles spreading through populations with differing levels of vaccine coverage: https://imgur.com/gallery/8M7q8#J7LANQ4
BEHAVIORAL	sbsnewsgeneric	A video showing how herd immunity works in general: https://www.sbs.com.au/news/two-sydney-babies-too-young-to-be-vaccinated-infected-with-measles
BEHAVIORAL	publichealthagencycanadaflu	A video showing how herd immunity works in the context of influenza: https://www.canada.ca/fr/sante-publique/services/video/la-grippe-n-en-passez-pas-les-maux.html
BEHAVIORAL	robertkochgeneric	A web-based application showing how herd immunity works in general: http://rocs.hu-berlin.de/D3/herd/

Timeline

• Start date: 2021-03-01
• Primary completion: 2021-07-01
• Completion: 2021-07-01
• First posted: 2021-03-09
• Last updated: 2024-08-29

Locations

1 site across 1 country: Canada