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.
DSST test symbol coding table. DSST, digit symbol substitution test, that is based on a digital-symbol coding table, where each digit from 1 to 9 corresponds to a symbol. The subjects matched symbols to numbers as many times as they could in a coding table for 90 s, and the higher the score, the better the cognitive function.
