Practice Quiz

CLEP Intro Edu Psych

Category - Testing

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Mrs. Olivas has so many essays to grade that she asks an assistant to grade half the essays. Mrs. Olivas is a thorough grader and marks students off for errors in grammar, punctuation, and spelling. The assistant on the other hand, gives full points to any student whose ideas she agrees with. Overall, the essays scored by Mrs. Olivas received lower grades than the tests scored by the assistant. What can be said about the grading method?
  1. It is reliable
  2. It is valid
  3. It is neither reliable nor valid
  4. It is both reliable and valid
Explanation
Answer: C - Reliability refers to the consistency of a measurement. Validity refers to whether a test measures what it is intended to measure. In this example, the grading was inconsistent, or unreliable. Mrs. Olivas graded in a very different way than her assistant. Each student’s grade depended greatly on the person who graded the essay. A test that is not reliable cannot be valid.
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