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.
Performance levels of children with autism, Down syndrome, and typical development on the Delayed Non-Matching to Sample, as measured by the number of trials required before achieving criterion performance, and the number of errors committed before achieving criterion performance.
