An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Núñez RE, Cornejo C.Núñez RE, et al.Cogn Sci. 2012 Aug;36(6):965-91. doi: 10.1111/j.1551-6709.2012.01237.x. Epub 2012 Mar 14.Cogn Sci. 2012.PMID: 22417143Free article.