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Exam 9: Validity and Reliability

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Question 21

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Other things being equal, would the following practices increase or decrease score reliability? a.The teacher decided to give a short quiz instead of the usual chapter test. b.The teacher added five easy test items that everyone could answer correctly. c.The teacher included 20 spelling words instead of 10 words on the spelling test.

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a.Decrease...

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Question 22

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Exhibit 9-4: Following is a list of testing practices.Assuming other things are equal, indicate whether the practice would lower reliability, raise reliability, or neither. -Refer to Exhibit 9-4.Removing ambiguous items from the test

A) lower reliability
B) raise reliability
C) neither raise nor lower reliability

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Question 23

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Evidence based on test-criterion relationships may vary from time to time and place to place.Researchers attribute this lack of agreement in validity studies to the

The Kuder-Richardson 21 formula for estimating the score reliability of a classroom achievement test has the disadvantage that

A test has a reliability coefficient of .75.This coefficient indicates that

You are considering two tests to be used for selection into a class for gifted students.Test A has a mean of 85, standard deviation of 10, and a score reliability of .91.Test B has a mean of 85, standard deviation of 8, and a score reliability of .75.On which test would a student's score be expected to fluctuate more on repeated administrations?

Four groups of sixth grade students took the same test in reading.The reliability coefficient will be highest for

One way to describe the score reliability of a criterion-referenced test is in terms of the consistency with which individuals

Miss Smith compares the items on the Powers Chemistry Test to the content and objectives in her chemistry course.Miss Smith is most concerned with

A language aptitude test is administered to 50 students who are entering an honors French course.After one semester, their scores from the final examination in the French course are correlated with the scores from the language aptitude test.The resulting correlation coefficient would provide what kind of evidence of the test's score validity?

Exhibit 9-7: The following results were obtained when two forms of a criterion-referenced test were administered to a sample of 50 students: Form 1 Nonmaster Master -Refer to Exhibit 9-7.Calculate the agreement coefficient for this test.

Exhibit 9-1: Choose the type of evidence for validity that is referred to in the following questions. -Refer to Exhibit 9-1.The test predicts performance in foreign language study.

An investigator computed the split-half reliability coefficient of a test and found it to be .85.Later an equivalent form of the test was prepared and the reliability computed by administering the two forms to a group.One might expect that the reliability coefficient obtained by the latter procedure would be

Exhibit 9-6: Indicate which type of evidence is being gathered in the following questions. -Refer to Exhibit 9-6.A teacher tries to determine if the numerical reasoning test is really measuring numerical reasoning skills rather than ability to read the test items.

Which of the following would represent discriminant evidence for the score validity of a test of numerical aptitude?

The textbook defines test reliability as the ratio between the variance of the

Exhibit 9-6: Indicate which type of evidence is being gathered in the following questions. -Refer to Exhibit 9-6.A teacher correlates students' scores on the test with the final semester grade received in the course.

Exhibit 9-5: Choose the method of estimating score reliability that would be most useful for each of the types of tests listed below. -Refer to Exhibit 9-5.A classroom achievement test used for grading purposes

Which of the following statements is true?

Low correlations with tests measuring different constructs provide ____ evidence for the score validity of an instrument.