Which of the following statements is true about carrying out experiments and quasi-experiments in social agencies?
A) The intervention being tested is almost always implemented in the intended fashion.
B) The control condition almost never is contaminated by interaction between clients in the experimental and control groups.
C) Practitioners might violate the research protocol for case assignment to make sure that clients receive the intervention being evaluated.
D) Outside agencies can be relied upon to refer enough clients to ensure obtaining a sufficient sample size.
After the delivery of their baby, new parents in hospital A were given a poison-control test. While at the hospital they attended a training session on poison control. At the end of a week, they were given the poison-control test again. After the delivery of their baby, new parents in hospital B were given the poison-control test. One week later they were given the test again. What kind of design is being used?
A) pretest-posttest control group:
B)time series.
C)nonequivalent comparison group:
D) cross-sectional design.
E) multiple time-series.
Which of the following is descriptive of simple time-series designs?
A) They guard against a process of maturation that could occur and would otherwise go undetected.
B)Regular fluctuations that occur apart from the experimental stimulus cannot be identified.
C)They serve as a protection against the possible influence of some extraneous factor.
D) The fewer data point, the better.
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