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.
P values between the completion time of all forms.
| Form comparisons | P value |
| Single-page form and multipage form | <.001 |
| Single-page form and conversational form | .02 |
| Single-page form and paper sheet | <.001 |
| Multipage form and conversational form | .10 |
| Multipage form and paper sheet | <.001 |
| Conversational form and paper sheet | <.001 |
