1. True Score Theory in Measurement

2. True Score Theory Holds that the... 1234512345 1234512345 3Scan a multitude of information and decide what is important. 1234512345 1234512345 1234512345 1234512345 1234512345 1Manage time effectively 2Manage resources effectively. 3Scan a multitude of information and decide what is important. 4Decide how to manage multiple tasks. 5Organize the work when directions are not specific. 1Manage time effectively Rating Sheet Observedscore

3. True Score Theory 1234512345 1234512345 3Scan a multitude of information and decide what is important. 1234512345 1234512345 1234512345 1234512345 1234512345 1Manage time effectively 2Manage resources effectively. 3Scan a multitude of information and decide what is important. 4Decide how to manage multiple tasks. 5Organize the work when directions are not specific. 1Manage time effectively Rating Sheet Observedscore...is a linear additive function of some unseen... = Trueability

4. True Score Theory 1234512345 1234512345 3Scan a multitude of information and decide what is important. 1234512345 1234512345 1234512345 1234512345 1234512345 1Manage time effectively 2Manage resources effectively. 3Scan a multitude of information and decide what is important. 4Decide how to manage multiple tasks. 5Organize the work when directions are not specific. 1Manage time effectively Rating Sheet Observedscore...and a random component... = Trueability + Randomerror

5. True Score Theory 1234512345 1234512345 3Scan a multitude of information and decide what is important. 1234512345 1234512345 1234512345 1234512345 1234512345 1Manage time effectively 2Manage resources effectively. 3Scan a multitude of information and decide what is important. 4Decide how to manage multiple tasks. 5Organize the work when directions are not specific. 1Manage time effectively Rating Sheet Observedscore In notational form, the right side of the equation is... = Trueability + Randomerror Te+

6. True Score Theory 1234512345 1234512345 3Scan a multitude of information and decide what is important. 1234512345 1234512345 1234512345 1234512345 1234512345 1Manage time effectively 2Manage resources effectively. 3Scan a multitude of information and decide what is important. 4Decide how to manage multiple tasks. 5Organize the work when directions are not specific. 1Manage time effectively Rating Sheet Observedscore...and the whole model is represented in equation form as... = Trueability + Randomerror T e + X

7. True Score Theory Observedscore It follows from this that the variability of the observed score, X, is the additive combination of the variability of the true score and the error. = Trueability + Randomerror var(X) = var(T) + var(e)

8. True Score Theory l Is a simplistic yet powerful model for measurement l Is not the only model around l Is the foundation of reliability theory l Can be used in computer simulations to generate “observed” scores with certain properties