19,710 rated or chosen profiles from 1,971 respondents, in up to 5 tasks of 2 profiles varying on 7 attributes.

About this table

Description	COVID-19 vaccine conjoint: 1,971 U.S. adults (Lucid, July 2020) each saw 5 pairs of hypothetical vaccines varying on 7 attributes (efficacy, duration, major and minor side effects, FDA approval, origin, endorsement); choice of vaccine A, B or neither, plus a 7-point likelihood of taking each.
Reference	Kreps, S., Prasad, S., Brownstein, J. S., Hswen, Y., Garibaldi, B. T., Zhang, B., & Kriner, D. L. (2020). Factors associated with US adults' likelihood of accepting COVID-19 vaccination. JAMA Network Open, 3(10), e2025594.
DOI	10.1001/jamanetworkopen.2020.25594
Licence	CC0 1.0
Source data	https://doi.org/10.7910/DVN/6BSJYP

Notes

Conjoint table (irw_conjoint). Respondents could choose vaccine A, B or neither: 2,071 of 9,855 tasks are opt-outs, with choice = 0 on both profiles. rating is the 1-7 likelihood of taking each vaccine (7 = extremely likely). FDA attribute text shortened; consent item and the authors' derived dummies dropped.

These notes describe the source data, which the IRW reproduces as released. All notes are listed on the Data Notes page.

Design

Topic	health covid
A profile represents	product service
Country	US
Language shown	unknown
Language of stored levels	en
Randomization restrictions	unknown
Task order	recorded in the deposit
Profile position	recorded in the deposit

Outcomes:

choice	asked whether they would choose vaccine A, vaccine B, or neither vaccine (paraphrase) [choice, opt-out allowed]
rating	How likely or unlikely would you be to get Vaccine A [B] [rating, 1 (extremely unlikely) to 7 (extremely likely)]

Columns

attr_durationattr_efficacyattr_endorsedattr_fdaattr_majorsideattr_minorsideattr_originchoicecov_agecov_covid_chinacov_covid_fed_approvecov_covid_futurecov_educationcov_evangelicalcov_flu_vaccinecov_gendercov_ideologycov_incomecov_insurancecov_mandatory_vaxcov_party_idcov_party_leancov_personal_contact1cov_personal_contact2cov_pharmacov_pres_approvalcov_race_1cov_race_2cov_race_3cov_race_4cov_race_5cov_race_6cov_religcov_statecov_vaccine_safetycov_work_homecov_work_statusidprofileratingtask

The layout (one row per respondent, task and profile; choice/rating outcomes; attr_ columns holding each attribute level as displayed) is defined in the IRW conjoint standard. What the outcomes asked is under Design above.

Get the data

Download CSVno account needed Browse on Redivisexplore and query Croissant metadataHugging Face, Kaggle, OpenML

Or load it directly in R or Python (both need a free Redivis account; the first call opens a browser to sign in):

# R
install.packages("remotes")
remotes::install_github("itemresponsewarehouse/Rpkg")
library(irw)
df <- irw_fetch("kreps_2020_covid_vaccine", source = "conj")

# Python
pip install irw

import irw
df = irw.fetch("kreps_2020_covid_vaccine", source="conj")

How to cite

@article{Kreps_2020, title={Factors Associated With US Adults’ Likelihood of Accepting COVID-19 Vaccination}, volume={3}, ISSN={2574-3805}, url={http://dx.doi.org/10.1001/jamanetworkopen.2020.25594}, DOI={10.1001/jamanetworkopen.2020.25594}, number={10}, journal={JAMA Network Open}, publisher={American Medical Association (AMA)}, author={Kreps, Sarah and Prasad, Sandip and Brownstein, John S. and Hswen, Yulin and Garibaldi, Brian T. and Zhang, Baobao and Kriner, Douglas L.}, year={2020}, month=Oct, pages={e2025594} }

Respondents	1,971
Rows (one per respondent, task and profile)	19,710
Tasks per respondent (most)	5
Profiles per task	2
Attributes	7
Tasks with no profile chosen	2,071

IRW version	v584
Redivis dataset	irw_conjoint v4.2
Redivis dataset DOI	10.57761/qkye-q530
Manifest pin for this IRW version	v4.2
Metadata source	irw_meta v44.0

kreps_2020_covid_vaccine