Final answer:
Concurrent validity is used to compare a new test's measurement with a 'gold standard' measurement to determine its accuracy.
Step-by-step explanation:
The type of validity in which an interpretation is justified by comparing a measurement to a "gold standard" measurement at approximately the same time is known as concurrent validity. This form of validity is used to assess the accuracy of a new test by comparing it to an established test that is already considered valid for the same purpose, demonstrating that the new test is capable of producing similar results.
In general, ensuring that a measurement or tool is both reliable and valid is crucial in research. Reliability focuses on the consistency of a measurement over time, while validity focuses on how well the measurement reflects what it is intended to measure. Valid measurements must be reliable, but not all reliable measurements are automatically valid.