Whenever feasible, the process of evaluation of the human services involves the use of two groups. The assignment and the use of the two groups generally include:
A) comparing the gain scores of a group of clients who received the treatment/service at one time with another group that received the treatment/service in a different agency 10 years ago
B) comparing the pretest and posttest scores of a group of people before and after the treatment/service
C) comparing the pretest and posttest scores of a group of people who did not receive the service/treatment
D) comparing the gain scores of a group of clients who received the treatment/service with the scores of a group of clients who did not receive the treatment/ service
Correct Answer:
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