The textbook defines test reliability as the ratio between the variance of the
a. error scores and true scores.
b. true scores and observed scores.
c. error scores and observed scores.
d. two sets of scores from identical or equivalent tests.
Ques. 2Refer to Exhibit 9-4. Adding 10 items to the test that everyone answers correctly.
a.
lower reliability
c.
neither raise nor lower reliability
b.
raise reliability
Ques. 3Refer to Exhibit 9-4. Removing ambiguous items from the test
a.
lower reliability
c.
neither raise nor lower reliability
b.
raise reliability
Ques. 4Refer to Exhibit 9-4. Adding 10 items similar to those already in the test
a.
lower reliability
c.
neither raise nor lower reliability
b.
raise reliability
Ques. 5Refer to Exhibit 9-4. Changing from a multiple-choice test to an essay test covering the same materials.
a.
lower reliability
c.
neither raise nor lower reliability
b.
raise reliability
Ques. 6An individual's score on an achievement test is .82. The standard error of measurement for the test is reported to be 3 points. What are the chances that the individual's true score is between 76 and 88?
a. About 1 chance in 3
b. About 1 chance in 6
c. About 2 chances in 3
d. About 9 chances in 10
e. About 95 chances in 100
Ques. 7A test has a reliability coefficient of .84. What percent of test variance is error?
a. 4
b. 16
c. 32
d. 71
e. 84
Ques. 8The correlation between two equivalent forms of an objective test administered in immediate succession enables one to determine the proportion of error variance due to
a. item homogeneity.
b. temporal fluctuation.
c. item sampling.
d. scorer reliability.
e. a and b
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