Question 1
2.5 out of 2.5 points
This figure depicts the typical relation found between a person's age (in years) and
his or her reaction time in a simple reaction time task (e.g., time to press a button
when a light turns green).
Figure: Age and Reaction
Question 1
0 out of 5 points
If an extreme score is added to a data set, increasing the
range of data, the standard deviation will:
Selected Answer:
decrease.
Answers:
get closer to 0.
decrease.
increase.
be unchanged.
Question 2
5 out of 5 points
Profess
Question 1
5 out of 5 points
Which of these situations is an example of randomly assigning participants to
conditions in a study?
Selected Answer:
Correct Every time a participant shows up for his study, Mark flips a coin to
determine which condition to p
Question 1
0 out of 5 points
Dr. Feldman was interested in the effect of Valium on motor performance. He had his
student research assistants inject 30 rats in the experimental group with a small
amount of Valium and 30 rats in the control group with salin
Question 1
5 out of 5 points
A clinical researcher was interested in determining whether her interventions for
depression were effective in minimizing depression symptoms among her
participants. To assess the effectiveness of her treatment program, she ad
Question 1
5 out of 5 points
When F is significant:
Selected Answer:
one does not know which specific means differ significantly.
Answers:
the values of the means that are closest together are the only ones that are
significant.
the values of the means th
Question 1
5 out of 5 points
The distribution of means based on a sample size of 45, pulled from a population
distribution with a mean of 100 and a standard deviation of 15, would have a
standard error of:
Selected Answer:
2.24.
Answers:
2.24.
3.00.
25.82
Question 1
5 out of 5 points
If there is less than a(n) _ percent chance of rejecting the null hypothesis when it
is false, there is insufficient power.
Selected Answer:
80
Answers:
50
60
80
90
Question 2
5 out of 5 points
Statistical power is a measure o
Question 1
5 out of 5 points
A psychologist is interested in whether working memory is influenced by sleep loss.
The psychologist administers a measure of working memory to a group of subjects
at 8 A.M. on Day 1 of the study and then again at 8 A.M. on Da
Question 1
5 out of 5 points
What are the consequences of failing to meet the assumptions of a parametric test
when performing research?
Selected Answer:
If the test is robust to the violation, it does not invalidate the research; however, it
may make it