Pat Wright is working to develop a new test of basic math skill. This test will be used to screen candidates for administrative positions in the company's warehousing and supply function. In conducting research during the test development process, Pat administers the test multiple times to a group of subjects over a five$-$day period. He hopes to to assess the stability or consistency of the test, which is also an assessment of the extent to which it is free from random error. What specifically is Pat trying to assess or measure concerning this new test?

Predictive validity

Concurrent validity

Content validity

Reliability