Behavioral observation scales: a. Measure how frequently employees engage in certain behaviorsb.
b. Are a norm-referenced appraisal formatc.
c. Require little time for completion of an appraisal using this format
d. Require less training for the rater than most other methods of appraisale.
e. Are accurately described by all of the above

e. Are accurately described by all of the above

Explanation:

Behavioral observation scales are methods of evaluating and measuring the frequency with which employees engage in behaviors required for them to excel at their work assignments. A weighted average of the overall score measures the relative importance of each measure. These tests are norm-referenced, and this implies that the test compares the performance of each test taker to others

The format of the test is such that it is rated and individuals just have to tick the frequency of their performance. This makes the process less time-consuming. Raters do not also have to undergo intensive training to be able to administer these tests.

answer(d) all of the choices are correct;