Guide to using the learning objectives


 

Learning Objectives for Chapter Four – Measuring and Manipulating Variables:  Reliability and Validity

 

Pages 85-96

 

1.   Define1 operational definition. Explain2 how operational definitions allow psychology to be a science.

2.   Discuss2 the difference(s) between bias and random error. Then, discuss2 the differences between observer bias and random observer error.

3.   Provide3 a list of methods that can be used to minimize or reduce observer bias. 

4.   For each item you listed in response to the above objective, defend4 the use of that method for reducing observer bias.

5.   Explain2 how random observer error can be reduced.

6.   Compare and contrast4 subject bias with random error due to the participant.

a.   How are they similar?

b.   How are they different?

7.   Define1 social desirability bias and provide3 at least two examples.

8.   Define1 subject bias.

9.   Discuss2 at least two methods for reducing subject bias.

10.                 Explain2 what is meant by demand characteristics.

 

Pages 96-106

 

 

11.                 Define1 reliability. Then, explain2 how you would measure reliability.

12.                 Explain2 why reliability is a prerequisite to validity.

13.                 Describe2 how you would determine whether a measure was sufficiently reliable.

14.                 A measure’s reliability is too low. Describe2 the steps you could take to determine the cause of the measure’s low reliability.

15.                 Distinguish4 between interobserver reliability and test-retest reliability.

16.                 Explain2 why psychologists attempt to increase interobserver reliability.

17.                 Define1 internal consistency, explain2 why low internal consistency is a problem, describe2 two strategies used to increase internal consistency2, and list1 three measures of internal consistency.

 

 

 

 

Pages 107-114

 

18.                 Define1 construct validity. Distinguish4 between reliability and construct validity.

19.                 List1 three strategies researchers can use to make the case for a measure’s construct validity.

20.                 Distinguish4 between convergent and discriminant validity.

21.                 Design5 at least three studies that would provide evidence that an aggression test had construct validity. Rank6 your studies in order of importance and justify6 your rankings.

 

 

 

Pages 114-119

 

 

22.                 List1 four factors that can threaten both the validity of a measure and the validity of a manipulation.

23.                 Explain2 how using a placebo treatment and blind procedures can improve the validity of a manipulation.

24.                 Explain2 why researchers often used manipulation checks.

25.                 Compare4 and contrast4 instructional manipulations, environmental manipulations, and stooge manipulations. Be sure to address the advantages and disadvantages of these three types of manipulations.

26.                 Propose5 a method of manipulating participants’ moods. Identify1 the type of manipulation (instructional, environmental, or stooge) you proposed and justify6 your use of that manipulation.


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