Question 1 (0.5 points) Which of these is NOT a potential drawback of a within-g
ID: 2929508 • Letter: Q
Question
Question 1 (0.5 points)
Which of these is NOT a potential drawback of a within-groups design?
Question 1 options:
Extraneous differences are held constant across conditions.
Participants cannot be returned to their original state after each condition.
Demand characteristics may result from hypothesis guessing with repeated testing.
Order effects can threaten internal validity.
Question 2 (0.5 points)
What is the name for a variable that the experimenter holds constant on purpose?
Question 2 options:
dependent variable
independent variable
control variable
confound variable
Question 3 (0.5 points)
Eric designs a study to examine drink preferences of university freshmen. He is planning to have all of the freshmen who participate in his study drink a cup of coffee then rate their enjoyment of the coffee, then drink a cup of tea and rate their enjoyment of the tea, and finally drink a cup of milk and rate their enjoyment of the milk. Eric tells Theresa about the plans for his study and she says she is concerned that he could have a problem with order effect in his study. How can Eric fix this problem?
Question 3 options:
matched groups
random sampling
counterbalancing
random assignment
Question 4 (0.5 points)
In psychology lab, Tetiana is conducting an experiment on depth perception using the Howard-Dolman box. Inside the box are two vertical rods and a horizontal ruler. The participant manipulates the rods until they appear to be aligned at the same distance away, then the experimenter measures how far out of alignment they are. There are three conditions: left eye only, right eye only, and both eyes. Tetiana is using a repeated-measures design. She finds that d = 1.53. What effect size is this?
Question 4 options:
weak
moderate
strong
This cannot be determined without knowing the number of participants.
Question 5 (0.5 points)
Eric designs a study to examine drink preferences of university freshmen. He is planning to have all of the freshmen who participate in his study drink a cup of coffee then rate their enjoyment of the coffee, then drink a cup of tea and rate their enjoyment of the tea, and finally drink a cup of milk and rate their enjoyment of the milk. What kind of design is this?
Question 5 options:
posttest only
pretest/posttest
concurrent measures
repeated measures
Question 6 (0.5 points)
According to Cohen’s conventions for effect size, how do you describe an effect size when d = 0.50?
Question 6 options:
not existent
weak
moderate
strong
Question 7 (0.5 points)
What is the name for the level of the independent variable that is intended to represent a neutral condition?
Question 7 options:
treatment group
manipulation group
experimental group
control group
Question 8 (0.5 points)
Which of these is NOT an advantage of within-groups designs?
Question 8 options:
elimination of practice effects
assurance of equivalence of the groups
requirement of fewer participants
more statistical power
Question 9 (0.5 points)
____________ is an extra dependent variable that can be used to help researchers quantify how well an experimental manipulation worked.
Question 9 options:
A pilot study
A Latin square
Counterbalancing
A manipulation check
Question 10 (0.5 points)
What design is an experiment in which each participant is randomly assigned to one level of the independent variable and then tested on the dependent variable once?
Question 10 options:
within-groups
repeated measures
pretest/posttest
posttest only
Extraneous differences are held constant across conditions.
Participants cannot be returned to their original state after each condition.
Demand characteristics may result from hypothesis guessing with repeated testing.
Order effects can threaten internal validity.
Explanation / Answer
Q1) Which of these is NOT a potential drawback of a within-groups design?
Answer: Extraneous differences are held constant across conditions.
Q2) What is the name for a variable that the experimenter holds constant on purpose?
Answer: control variable
Q 3) Eric designs a study to examine drink preferences of university freshmen. He is planning to have all of the freshmen who participate in his study drink a cup of coffee then rate their enjoyment of the coffee, then drink a cup of tea and rate their enjoyment of the tea, and finally drink a cup of milk and rate their enjoyment of the milk. Eric tells Theresa about the plans for his study and she says she is concerned that he could have a problem with order effect in his study. How can Eric fix this problem?
Answer: counterbalancing
Q4) In psychology lab, Tetiana is conducting an experiment on depth perception using the Howard-Dolman box. Inside the box are two vertical rods and a horizontal ruler. The participant manipulates the rods until they appear to be aligned at the same distance away, then the experimenter measures how far out of alignment they are. There are three conditions: left eye only, right eye only, and both eyes. Tetiana is using a repeated-measures design. She finds that d = 1.53. What effect size is this?
Answer: strong
Q5) Answer: repeated measures
Q 6) Answer: moderate
Q 7) Answer: control group
Q 8) Anwer: elimination of practice effects
Q9 Answer: A manipulation check
Q10 Answer: posttest only