When joyce takes a personality test, she is told that the test is reliable; that is, it must:?

I believe the answer is : produces the same results from one time to the next

When the result of a certain test is generally the same from one another, we can infer that the test result does not happen because some sort of 'luck' or random events. As the rate of unforeseen circumstances such as luck reduced, the reliability of the test would be increased.