wers, then you might be able to perform well on the test even if you don’t actually understand the material.</p>
<p>It is usually impossible to measure a construct without some amount of error. In the example above, you might know the answer, but you might mis-read the question and get it wrong. In other cases, there is error intrinsic to the thing being measured, such as when we measure how long it takes a person to respond on a simple reaction time test, which will vary from trial to trial for many reas