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.
Nathan JG, Anderson DR, Field DE, Collins P.Nathan JG, et al. Among authors: anderson dr.Hum Factors. 1985 Aug;27(4):467-76. doi: 10.1177/001872088502700410.Hum Factors. 1985.PMID: 4093139No abstract available.
Gibbons J, Anderson DR, Smith R, Field DE, Fischer C.Gibbons J, et al. Among authors: anderson dr.Child Dev. 1986 Aug;57(4):1014-23. doi: 10.1111/j.1467-8624.1986.tb00262.x.Child Dev. 1986.PMID: 3757597