Give three characteristics of a good measure. Explain why each is important, in your own words.
What will be an ideal response?
Ans: Three characteristics of a good measure are reliability, validity, and low social desirability. Reliability means that people score roughly the same each time they take they test (test-retest reliability). This is important because if scores changed every time you took the test, it would not be a good measure of someone’s stable characteristic. People change but not that much and not often. Validity measures whether or not a measure actually measures what it is supposed to measure. This just makes sense. If an item says its measuring intelligence, but it actually measures experience with a topic, then it will not predict the ability to learn a new subject or to do well on a behavior that the person has no experience. Finally, low social desirability refers to the idea that the measure is not susceptible to people responding in a way that just makes them look good. When conducting research, we want to know the truth. We do not want people just to answer in a way that makes them look favorable, we will not find the negatives about people’s lives and sometimes, the negatives are the truth.
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