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.
| Domain | Level 1 screener probe questions | Level 2 screener probe questions |
|---|---|---|
| Sample/participants | Was the sample appropriate in size and scope? | Was the sample appropriate in size and scope? |
| How representative was the sample? | Did investigators use a sample matched for developmental level? | |
| Were there exclusion criteria based on other disabilities? |
