twin control

in a twin study, a method in which the target twin—that is, the one who has had certain experiences or training or has been exposed to the experimental condition—is compared with the twin who has not had the experiences, training, or treatment and therefore serves as a control. Also called cotwin control.

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Psychology term of the day

December 26th 2024

tractotomy

n. the surgical interruption of a nerve tract in the brainstem or spinal cord. One form of tractotomy is of benefit in bipolar disorder that is resistant to other forms of treatment.