Researchers assess the correlation between scores obtained on two halves of a single test in order to measure the ________ of a test.

A) validity
B) reliability
C) standardization
D) normal distribution

The correlation between scores obtained on two halves of a test is a measure of how consistently the test measures what it is supposed to measure, which is the definition of reliability. Validity refers to how well the test measures what it is supposed to measure, while standardization refers to the process of establishing a consistent set of testing conditions and procedures. Normal distribution refers to the distribution of scores in a population, which may or may not be relevant to assessing the reliability of a test.