Question

A 40-item vocabulary test was administered to a group of students. A second, similar test of vocabulary terms was administered to this same group of students approximately one week later. The researcher reported that the correlation between these two tests was r = .90. What type of reliability is represented in this example?

(A) Test-retest
(B) Internal consistency
(C) Alternate forms
(D) Split-half
(E) Inter-rater

Answer 1

The type of reliability represented in this example is (A) Test-retest reliability.

Test-retest reliability assesses the consistency of test scores over time when the same test is administered to the same group of individuals on two separate occasions. In this case, the students took a vocabulary test, and a similar test with the same vocabulary terms was administered to them approximately one week later. The correlation coefficient of r = .90 indicates a strong positive relationship between the scores obtained on the two tests. This suggests that the scores are highly consistent or stable over time, indicating good test-retest reliability.

Answer 2

The type of reliability represented in this example is (A) Test-retest reliability.

Step-by-step explanation:

Test-retest reliability refers to the consistency or stability of test scores over time when the same test is administered to the same group of individuals on two different occasions. In this case, the researcher administered a vocabulary test to a group of students and then administered a similar vocabulary test to the same group of students approximately one week later. The correlation coefficient of r = .90 indicates a strong positive relationship between the scores obtained on the two occasions, suggesting high test-retest reliability.