Final answer:
Validity is the extent to which a test yields the same results as other established measures of the same phenomena. Reliability, on the other hand, refers to the consistency and reproducibility of a given result. Validity and reliability are important considerations in research.
Step-by-step explanation:
Validity is the extent to which a test yields the same results as other established measures of the same phenomena. Being consistent in measurement does not necessarily mean that something has been measured correctly. Reliability, on the other hand, refers to the consistency and reproducibility of a given result. Validity and reliability are important considerations in research as researchers strive to use instruments that are both highly reliable and valid.