Experimental Evidence That Changing Beliefs About Mask Efficacy and Social Norms Increase Mask Wearing for COVID-19 Risk Reduction: Results From the United States and Italy

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ISPS ID: 
D177
Suggested citation: 

Bokemper et al., (2022). Replication materials for “Experimental Evidence That Changing Beliefs About Mask Efficacy and Social Norms Increase Mask Wearing for COVID-19 Risk Reduction: Results From the United States and Italy.” http://hdl.handle.net/10079/33092dd7-01e1-41eb-b80b-f2c460b3f803. ISPS Data Archive.

Author(s): 

Saad Omer, Paolo Pin, Amyn Malik, Elliott Paintsil, Scott Bokemper, Maria Cucciniello, Kathryn Willebrand, Gregory Huber, Tiziano Rotesi, Alessia Melegaro

Research design: 
Data type: 
Survey
Data source(s): 

Authors

Data source information: 

isps(at)yale(dot)edu

Field Date: 
2020-10-01 - 2020-11-08
Location: 
Location details: 
United States and Italy
Unit of observation: 
Individual
Sample size: 
5,759 (3,100 USA + 2,659 Italy)
Inclusion/exclusion: 
After providing informed written consent, respondents read an unrelated vignette to assess their attention. Those who did not answer a comprehension question correctly could not proceed with the study and exited the sample.
Randomization procedure: 
At the subject level, we randomized respondents at equal rates to a Placebo Control, where they read a message unrelated to the topic of the experiment, a Masks Protect You treatment that explains how masks stop some percentage of SARS-CoV-2 virus particles in the air from being inhaled by healthy people, and a Masks Protect Others treatment that explains how masks stop some percentage of SARS-CoV-2 virus particles from being expelled into the air by sick people.
Treatment: 
Our core randomized treatments allow us to test whether beliefs about mask efficacy and the mask wearing behavior of others as described in a vignette affect one’s own mask wearing and one’s willingness to encourage mask wearing by others.
Treatment administration: 
Web delivered
Outcome measures: 
beliefs about masks protecting you,beliefs about masks protecting others,behavioral intentions,third party judgment
Archive date: 
2022
Terms of use: 

ISPS Data Archive: Terms of Use.

Discipline: 
Area of study: 
Data file number Descriptionsort descending File format Size File url
D177F06 Curator README .txt 1776 Download file
D177F02 Data: ITA Public Replication .dta 11655410 Download file
D177F01 Data: US Public Replication .dta 12985157 Download file
D177F07 Metadata (DDI 3.2) .xml 2313856 Download file
D177F04 Program: Conduct ITA Analysis Final Public Replication .do 19730 Download file
D177F03 Program: Conduct US Analysis Final Public Replication .do 19820 Download file
D177F05 Survey instrument .pdf 374003 Download file