A
researcher examined the effect of relaxation training on insomnia.
Participants received 0, 2, 4, or 8 sessions of relaxation training.
Following training, the researcher measured how long it took the
participants
to fall asleep in their homes. The
average time for each group is presented in the following table:
TRAINING
SESSIONS
MEAN TIME (minutes)
0 72
2 58
4
31
8
14
1.
Provide definitions for independent variable and dependent variable.
2.
Identify the independent and dependent variables in the above scenario.
3.
How many levels of the independent variable are there? Explain.
4.
Is the independent variable quantitative or qualitative? Explain.
5.
Given the specifics of the experiment presented above, discuss a possible
confounding variable.