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measurement theory in action

Questions and Answers of Measurement Theory In Action

If the fit indexes indicated poor fit of your expected CFA model, what would you do next?
How should modification indexes be used in revising a model? What are dangers in using them?
How should item bundles be used when conducting a CFA? What are the advantages of bundles? What would be any disadvantages?
How can CFA be used to support validity evidence for a scale?
What are the major advantages of IRT over CTT-IA?
How do you determine the difficulty, discrimination, and pseudo guessing parameters in IRT? How are they different from CTT-IA?
When might it be preferable to use CTT-IA instead of IRT?
What are the advantages and disadvantages of the 1-PL, 2-PL, and 3-PL IRT models?
What advantages do IRFs (i.e., graphs) have over simply examining the item parameters in table form?
What does it mean to say that item and person parameters are invariant (i.e., locally independent) in IRT models, but not in CTT-IA?
What are the major advantages of CAT administration over traditional paper-and-pencil test administration?
Could CAT be used in small-scale applications? If so, explain how.
What unique information do IRFs and IIFs provide for test development and revision?
What is the difference between a test that is simply administered on a computer [sometimes called computer-based testing, (CBT)] and a computer adaptive test (CAT)?
How do DIF procedures extend CTT-IA analyses?
What are the advantages and disadvantages of using non-IRT DIF versus IRT-based DIF?
Why do we need to equate item parameters before running a DIF analysis?
How do item bias and test bias procedures differ? How are they similar?
What are the main differences between GT and CTT?
What are typical sources of error that are investigated in GT studies?
What does the variance component estimate tell us?
What is the difference between a fixed and a random facet?
What is the difference between a fully crossed design and a nested design?
What is the purpose of a D study?
What are the differences between absolute and relative decisions?
Why has GT been slow to be adopted in many research areas?

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