Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A phrase was assigned a value of −1 each time it was chosen as the least preferred phrase and +1 if it was the most preferred phrase, while accounting for clustering by respondent and by choice task. We set the least preferred phrase as the reference, so that a phrase with a preference weight of 2 is twice as preferred relative to the reference phrase.
