Cohen proposed effect-size conventions based on the effects observed in psychology research in general because
A) experimenters need to assess whether the obtained effect size will allow them to reject the null hypothesis.
B) determining how large an effect can be expected in a given experiment is difficult.
C) they follow from the original scales he developed.
D) they are more accurate than calculating a minimum meaningful difference.
Question 2
If a counseling psychologist wants to know if doubling the number of counseling sessions attended by students experiencing severe test anxiety will reduce or increase the amount of anxiety the students report just before a test, the statistical test
the psychologist would use would be
A) one-tailed because only one issue is discussedtherapy sessions.
B) one-tailed because there is only one interaction between the therapy and anxiety.
C) two-tailed because there are two variableswhether or not students undergo therapy and how anxiety is affected.
D) two-tailed because the direction of the effect of increasing the amount of therapy is not predicted.
A hypothetical example of the bottleneck effect.
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