follow Dictionary.com

Capitol vs. capital? What's the difference?

control group

noun
1.
(in an experiment or clinical trial) a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated.
Origin of control group
1950-1955
1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for control group
Contemporary Examples
Historical Examples
  • The test group shows no gain over the control group in strength of grip.

    Adenoids and Diseased Tonsils Margaret Cobb Rogers
  • There is no control group, and consequently, no way of knowing whether the improvement was due to the removal of the defect.

    Adenoids and Diseased Tonsils Margaret Cobb Rogers
  • The test group contains eight cases which made a poorer score at the end of the interval, the control group six.

    Adenoids and Diseased Tonsils Margaret Cobb Rogers
  • As a control group, there were chosen 45 boys who had had no operation, and who lived and worked under the same conditions.

    Adenoids and Diseased Tonsils Margaret Cobb Rogers
  • The greatest loss in strength of grip is found in the control group, but the greatest gain is also in this group.

    Adenoids and Diseased Tonsils Margaret Cobb Rogers
British Dictionary definitions for control group

control group

noun
1.
any group used as a control in a statistical experiment, esp a group of patients who receive either a placebo or a standard drug during an investigation of the effects of another drug on other patients
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Contemporary definitions for control group
noun

in a test or trial, a group that does not receive the new treatment being studied and which is compared to the group that does receive the new treatment

Usage Note

medicine

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
Cite This Source
control group in Medicine

control group n.
A group used as a standard of comparison in a control experiment.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for control group

Few English speakers likely know this word

Word Value for control

9
12
Scrabble Words With Friends