A psychologist develops a new assessment instrument for depression. She gives it to a sample of clients and then, some time later, gives it to the same sample again. What aspect of the assessment is she evaluating?

Reliability

Explanation:

Reliability has to do with the nature of estimation. In its regular sense,  reliability is the "consistency" or "repeatability" of your measures. Before we can characterize reliability definitely we need to lay the basis. In the first place, you need to find out about the establishment of dependability, the genuine score hypothesis of estimation. Alongside that, you have to comprehend the various sorts of estimation mistakes since blunders in estimates assume a key job in debasing reliability. With this establishment, you can think about the fundamental hypothesis of dependability, including the exact meaning of reliability. There you will discover that we can't compute reliability – we can just gauge it.