World Library  
Flag as Inappropriate
Email this Article

Four boxes test

Article Id: WHEBN0028951454
Reproduction Date:

Title: Four boxes test  
Author: World Heritage Encyclopedia
Language: English
Subject: Clouding of consciousness, Digit symbol substitution test
Publisher: World Heritage Encyclopedia

Four boxes test

The Four boxes test is a computer-based test used to measure reaction times. In the test, a black circle appears in one of four boxes on the screen, and the patient presses the corresponding key on the keyboard as quickly as possible. The next circle appears after 500 ms, until 52 circles have been exposed. The computer measures the time the subject takes to complete the test and the number of errors they make.[1]

The test has been used to measure long-term cognitive dysfunction in elderly people who have undergone an operation.[2] When subjects had undergone anesthesia with different drugs, and were then tested using the Stroop Colour and Word Interference Test, the Digit symbol substitution test and the Four Boxes test, recovery times varied both by anesthetic and by type of test.[3] Other studies have shown that there is an association between Postoperative cognitive dysfunction (POCD) and impaired performance in the four boxes test, but that the test is not a good predictor of POCD.[4]


This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.