cerebral angiography

a noninvasive technique for examining brain structure by taking X-rays after special dyes have been injected into cerebral blood vessels. Inferences about adjacent tissue can be made from examination of the principal blood vessels. It has been largely superseded by techniques based on magnetic resonance imaging, such as magnetic resonance angiography. Also called cerebral arteriography.

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Psychology term of the day

November 18th 2024

predictive validity

evidence that a test score or other measurement correlates with a variable that can only be assessed at some point after the test has been administered or the measurement made. For example, the predictive validity of a test designed to predict the onset of a disease would be strong if high test scores were associated with individuals who later developed that disease. It is one of three types of criterion validity. Also called predictive criterion-related validity; prospective validity. See also concurrent validity; retrospective validity.