Multiple Choice
A research assistant takes a survey of local high school students who participate in after-school sports about whether they have suffered a concussion in the last 90 days. This is an example of which method of controlling extraneous variables?
A) Random assignment
B) Bias selection
C) Random sampling
D) Manipulation control
Correct Answer:
Verified
Correct Answer:
Verified
Q2: A researcher is studying absorption rates of
Q3: A longitudinal design can often determine cause
Q4: A researcher wants to see if increased
Q5: Describe two threats to internal validity that
Q6: Which type of variable confuses the effect
Q7: A study designed to investigate an increase
Q8: A researcher would use between-groups design to
Q9: Randomization is one way researchers can control
Q10: Participants in trials of an experimental intervention
Q11: Following extensive research and examination of multiple