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n. any drug or other agent (e.g., the hormone vasopressin) that causes constriction of blood vessels so that the diameter of the vessels is reduced. The vasomotor nerves of the sympathetic nervous system also serve as vasoconstrictors. Vasoconstrictor drugs are used to increase blood pressure that has fallen to dangerously low levels. Also called vasopressor.

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Psychology term of the day

June 19th 2024

cautious shift

cautious shift

a choice shift in which an individual making a decision as part of a group adopts a more cautious approach than the same individual would have adopted had he or she made the decision alone. Studies suggest that such shifts are (a) rarer than the opposite risky shift and (b) most likely to occur when the majority of the members of the group, prior to discussion, favor a cautious rather than a risky choice. See also group polarization.