Chapter 4

Question 1

Which type of unreliability is most difficult to detect?

Answer 1

Systematic, because unless a lot is known about it, they are hard to detect

Question 2

What is the domain-sampling model?

Answer 2

It is a way of thinking about the composition of a psychological test that sees the test as a representative of the larger domain of possible items that could be included in the test

Question 3

Two quantitative indexes that allow us to be more precise than verbal labels allow, are what?

Answer 3

• reliability coefficients

- standard error of measurement

Question 4

What is the difference between the reliability coefficient and the standard error of measurement, in terms of their applications?

Answer 4

Reliability - used in forming judgements about the overall value of a particular test
SEM - used in making judgements about individual scores obtained with the test

Question 5

What are the two sources of unreliability of psychological tests?

Answer 5

Systematic and unsystematic error

Question 6

The reliability coefficient can be calculated ____ ways

Answer 6

3

Question 7

Cronbach’s alpha is a measure of what?

Answer 7

Internal consistency

Question 8

According to Nunnally, what ratings of reliability are required for test development, using a test in research, and for individual assessment?

Answer 8

0.5, 0.7, and 0.9

Question 9

Which tests have the highest ratings of reliability?

Answer 9

Cognitive tests