Which of the following best describes the purpose of a control group in an experiment?
Question 2
Which of the following is a key characteristic of a correlational research method?
Question 3
In psychological research, what does the term 'reliability' refer to?
Question 4
Which of the following is an example of an operational definition in a psychological study?
Question 5
A researcher conducts a study on the relationship between hours of sleep and test performance. The correlation coefficient is found to be $r = -0.65$. What does this indicate?
