Consider how you might rate the performance of three instructors from whom you are currently taking a course.
(a) Would it be harder to rate the instructors' performance or to rank their performance? Why?
(b) Write three items to use in rating the instructors--one each to rate them in terms of an attribute, a behaviour, and an outcome.
(c) Which measure in (b) do you think is most valid? Which is the most reliable? Why?
(d) Many colleges use questionnaires to gather data from students about their instructors' performance. Would it be appropriate to use the data for administrative decisions? What about for developmental decisions? What about other decisions? Why or why not?
It will be harder to rank their performance. The reason is that each of the three instructors teaches different subjects and uses different teaching methods. Ranking them will be difficult. However, it will be less hard to use a rating scale and rate each instructor separately on different performance criteria.
The three items to use in rating instructors:
1. How do you rate the personality of your instructor? (Attribute)
2. How do you rate the communications of your instructor? (Behavior)
3. How do you rate your learning experience from the instructor? (Outcome)
Reliability means that each time the question is asked, the same results are obtained. On the other hand, validity means that the question and its ...
This posting gives you a step-by-step explanation of Performance Appraisal . The response also contains the sources used.