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1. link.springer.com › chapter › 10Understanding and Utilizing Item Characteristic Curves (ICC ...

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   Jul 16, 2020 · Item characteristic curves are often presented in Rasch articles and presentations; however, how should researchers read such curves and look at such curves to better evaluate test or survey items? What is the pattern that researchers want to see from data that are...

   • Author: William J. Boone, John R. Staver

   • Publish Year: 2020

2. www.sciencedirect.com › item-characteristic-curveItem Characteristic Curve - an overview | ScienceDirect Topics

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   An Item-Characteristic Curve, pi, = probability that a test taker with trait value θ passes item i. A steep ICC indicates that the item discriminates well, a shallow slope, that it discriminates poorly. Also, an ICC provides bi an index of item difficulty that increases, rather than decreases, with difficulty.

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   What is an item characteristic curve?

   • The item characteristic curve is the basic building block of item response theory and all the other constructs of the theory depend upon this curve. Because of this, considerable attention will be devoted to this curve and its role within the theory. There are two technical properties of an item characteristic curve that are used to describe it.

   The Item Characteristic Curve | SpringerLink

   link.springer.com/chapter/10.1007/978-3-319-54205-8_1

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   What is item characteristic curve (ICC)?

   • The item characteristic curve (ICC) is the fundamental unit in IRT and can be understood as the probability of endorsing an item (for a dichtomous response) or responding to a particular category of an item (for a polytomous response) for individuals with a given level of the attribute.

   Overview of Classical Test Theory and Item Response Theory for

   www.ncbi.nlm.nih.gov/pmc/articles/PMC4096146/

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   What is the characteristic curve for a three-parameter model?

   • The item characteristic curve for the three-parameter model with b = 1. 5, a = 1. 3, and c = 0. 2 While most test items will discriminate in a positive manner; that is, the probability of correct response increases as the ability level increases, some items have negative discrimination.

   Item Characteristic Curve Models | SpringerLink

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   How do you plot an item characteristic curve?

   • Use the function iccplot to plot an item characteristic curve of an item with hard item difficulty and low item discrimination. From the graph it can be seen that the probability of correct response will have a low general level over most of the ability scale. The item characteristic curve will not be very steep.

   The Item Characteristic Curve | SpringerLink

   link.springer.com/chapter/10.1007/978-3-319-54205-8_1

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4. edres.org › irt › bakerCHAPTER 1 The Item Characteristic Curve - EdRes.org

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   It increases until at the highest levels of ability, the probability of correct response approaches 1. This S-shaped curve describes the relationship between the probability of correct response to an item and the ability scale. In item response theory, it is known as the item characteristic curve. Each item in a test will have its own item ...

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5. edres.org › irt › bakerCHAPTER 2 Item Characteristic Curve Models - EdRes.org

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   It was first used as a model for the item characteristic curve in the late 1950s and, because of its simplicity, has become the preferred model. The equation for the two-parameter logistic model is given in equation 2-1 below. θ = 1 = 1. ( ) + e −. L. + e −. ( θ − b ) [2-1] where: e is the constant 2.718.

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6. www.ncbi.nlm.nih.gov › pmc › articlesOverview of Classical Test Theory and Item Response Theory ...

   www.ncbi.nlm.nih.gov › pmc › articles

   Item Characteristic Curve. The item characteristic curve (ICC) is the fundamental unit in IRT and can be understood as the probability of endorsing an item (for a dichtomous response) or responding to a particular category of an item (for a polytomous response) for individuals with a given level of the attribute.

7. link.springer.com › chapter › 10Item Characteristic Curve Models | SpringerLink

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   Apr 26, 2017 · The item characteristic curve will be displayed on the screen by typing in the following command line: > icc(b=-2.0, a=1.0, c=.10) (d) The item characteristic curve is located in the low-ability end of the scale and it is moderately steep. (e) Next, we want to put another item characteristic curve on the same graph. Type in the following ...