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.
The CAR of the initial trial was not significantly higher than that of a random guess. Significant improvement in CAR was observed in the second trial after a six-month interval.
CAR: correct answer rate.
| Initial trial | Second trial | P value | |
| CAR (%) | 61.1 ± 21.5 | 80.0 ± 15.8 | 0.01 |
