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Test Construction Reliability: True Score vs. Observed Score

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Test Construction Reliability: True Score vs. Observed Score

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Questions and Answers

What type of error does the split-half reliability method address?

Inter-item inconsistency error
Scorer variance error
Sampling error
Content sampling error (correct)

What is the limitation of the reliability index gathered through split-half reliability?

It only measures the reliability of half the number of items in the test (correct)
It addresses inter-item inconsistencies
It is not a measure of reliability at all
It is a measure of scorer reliability

What is the formula for KR20?

rtt = 1 + rh / h
KR20 = rtt = 1 + rh / h (correct)
rtt = 1 + rh
KR20 = rtt = 1 - rh / h

What does the coefficient alpha measure?

Inter-item consistency (B) Signup and view all the answers

What is the purpose of scorer reliability?

To minimize scorer variance in judgmental tests (C) Signup and view all the answers

What type of tests are prone to scorer variance?

Projective tests and unstructured personality tests (C) Signup and view all the answers

What is the formula for Coefficient Alpha?

r = (n / (n-1)) * (1 - (Σpq) / SD2t) (D) Signup and view all the answers

What does the correlation in split-half reliability signify?

The consistency of responses to all items in the test (C) Signup and view all the answers

Why is scorer reliability necessary in certain tests?

Because test scores rely on the judgment of the scorer (A) Signup and view all the answers

What is the purpose of KR20?

To measure inter-item consistency (A) Signup and view all the answers