Reliability in Assessment Procedures

What is Reliability?

• The degree to which test scores are dependable, consistent, and stable across repeated testings.

• The test results, not the instrument itself.

• The difference between the observed score and the individual’s true ability.

• The factors unrelated to what is being measured.

What is Measurement Error?

• The difference between the observed score and the individual’s true ability.

• The score obtained on the test.

• The individual’s actual level of ability.

• Factors unrelated to what is being measured.

What are the sources of Measurement Error?

• Time-Sampling Error

• Content-Sampling Error

• Interrater Differences

• Test-Taker Variables

A reliability coefficient closer to 1.0 indicates higher test consistency.

• True

• False

What is the purpose of a reliability coefficient?

• To determine the average score of test takers.

• To measure the validity of a test.

• To assess the difficulty level of test items.

• To quantify the degree of consistency of test scores.

What is the significance of a high reliability coefficient?

• It indicates that the test scores are consistent across different administrations.

• It shows that the test is valid.

• It suggests that the test measures multiple constructs.

• It means the test is easy to pass.

What is Test-Retest Reliability?

• Administering the same instrument on two separate occasions.

• Correlating the first set of scores with the second set of scores.

• Assessing the consistency of client’s scores from one test administration to the next.

• All of the above.

What is the focus of Test-Retest Reliability?

• Assessing the consistency of client’s scores.

• Determining the reliability coefficient.

• Evaluating the test's purpose.

• Identifying measurement errors.

What is the Standard Error of Measurement (SEM)?

• A measure of how much an individual’s score might vary due to measurement error.

• A direct measure of reliability.

• A range of scores where the test taker’s true score likely falls.

• A method to increase reliability.

What strategies can be used to increase reliability?

• Increase the number of test items.

• Write understandable, unambiguous items.

• Use selected-response instead of constructed-response items.

• All of the above.