Is the Measure of Consistency a State of Mind?Resources Attributes and Evaluation of Discussion Contributions. Professional Communications and Writing Guide.In your unit readings from the Psychological Testing and Assessment text, you read about three sources of error variance that occur in testing and assessment. These include test construction, test administration, and test scoring and interpretation. Additionally, other sources of error may be suspect. You were also introduced to reliability coefficients, which provide information about these sources of error variance on a test (see Table 5-4).The following reliability coefficients were obtained from studies on a new test, THING, purporting to measure a new construct (that is, Something). Alternate forms of the test were also developed and examined in subsequent studies published in the peer-reviewed journals. The alternate test forms were titled THING 1 and THING 2. (Remember to refer back to your Psychological Testing and Assessment text for information about using and interpreting a coefficient of reliability.)Internal consistency reliability coefficient = .92Alternate forms reliability coefficient = .82Test-retest reliability coefficient = .50StudiesKey ConceptsReview Unit 3 Key Concepts.ReadingsUse your Psychological Testing and Assessment: An Introduction to Tests and Measurement text to complete the following:Read Chapter 5, “Reliability,” pages 145–180.Use your Standards for Educational and Psychological Testing text to complete the following:Read Chapter 2, “Reliability/Precision and Errors of Measurement,” pages 33–47.MediaComplete the following:Click Reliability to view the presentation.Click Reliability Exercise to view the presentation.Review the document List of Tests by Type [PDF]. Explore the list for potential selections due next week. (See the Unit 2 assignment and review the course project information.)ReliabilityBegin Activity iconTranscriptReliability ExerciseBegin Activity iconTranscript
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