Exam 4: Reliability and Validity

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Identify and define at least two ways to determine internal consistency.

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The consistency of items on an instrument to measure a skill, trait or domain is called internal consistency. It can be measured in the following ways:
Test-retest
-The trait being measured is one that is stable over time.
-Equivalent forms
-Two forms of the same instrument are used.
-Items are matched for difficulty on each test.
Split-half
-Takes all available items on a test and divides the items in half.
-Establishes reliability of half the test with the other half.
-Does not establish reliability of the entire test-reliability increases with the number of items.
Kuder-Richardson formulas
-Used to check consistency across items of an instrument with right or wrong answers.

Administering two instruments within a short period of time is necessary in order to establish which of the following?

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B

Would you consider purchasing this instrument?

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Yes but only to use with grades 2-5

Examiner is concerned with consistency of trait over time.

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Discuss some potential challenges associated with the validity of tests and their use.

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Discuss the positives and negatives of the implementation of accommodations when assessing a student with special needs.

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When a preschool test is needed to determine how students will perform in reading, it is important that the test have good predictive validity.

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Which of the following is considered a good reliability score?

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What is the term used to ensure that a psychological trait, personality trait, psychological concept attribute or theoretical characteristic is measured by an instrument?

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Comparing the scores of a new assessment instrument with the scores of an older test may help to establish which of the following?

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What happens to the standard error of measurement as the standard deviation increases?

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The smaller the standard error of measurement, the more ___ the test.

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Describe how the data would appear in a scattergram for a positive, negative and no correlation.

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Which of the following options would most likely represent a negative correlation?

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The standard error of measurement for a seven-year-old who was administered the Problem Solving subtest in the fall

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In studying the relationship between the scores of the administration of one test administration with the second administration of the test, the number .89 represents the ___.

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The validity of a test should be determined by how consistent the results are over time.

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Correlation coefficients are expressed as which of the following?

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Many colleges use the SAT as an entrance requirement for college. Why? What type of validity does the SAT offer?

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In order to have a better understanding of a student's true abilities, the concept of ___ must be understood and applied to obtained scores.

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