extraneous variable

a measure that is not under investigation in an experiment but may potentially affect the outcome or dependent variable and thus may influence results. Such potential influence often requires that an extraneous variable be controlled during research. See also confound.

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Psychology term of the day

February 23rd 2025

thiopental

n. an ultrashort-acting barbiturate used primarily as an anesthetic that can be administered intravenously to produce almost immediate loss of consciousness. It may also be used as an antidote for an overdose of stimulants or convulsants. At one time, it was occasionally used in psychotherapy to induce a state of relaxation and suggestibility. In nonmedical circles, it gained notoriety as a truth serum. U.S. trade name: Pentothal.