TABLE 1.
Experimental groups
| Group name | Device type | Answer format | Motivational message |
|---|---|---|---|
| PC‐Text | PC | Text | No |
| PC‐Image | PC | Image | No |
| PC‐ImagePush | PC | Image | Yes |
| S‐Text | Smartphone | Text | No |
| S‐Image | Smartphone | Image | No |
| PC‐ImagePush | Smartphone | Image | Yes |
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.