Psychometrics L9: Differential Item Functioning

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Questions and Answers

Two types of ______ - uniform and non-uniform

DIF

Differential item functioning is also known as

DIF

Respondents with the same latent trait but from different social groups have different probabilities of option selection in

DDF

The abbreviation 'IRT' stands for

<p>Item Response Theory</p> Signup and view all the answers

The abbreviation 'SAT' stands for

<p>Scholastic Assessment Test</p> Signup and view all the answers

What is the main focus of Differential Item Functioning (DIF)?

<p>Detecting differences in probability of question correctness between social groups (D)</p> Signup and view all the answers

What distinguishes Differential Distractor Functioning (DDF) from Differential Item Functioning (DIF)?

<p>DDF involves differences in item wording, while DIF focuses on group-based response variations (D)</p> Signup and view all the answers

In the context of Differential Item Functioning (DIF), what does 'uniform' variation refer to?

<p>Consistent differences in probability of question correctness across all items (B)</p> Signup and view all the answers

How can Differential Item Functioning (DIF) be best described?

<p>An approach to detecting differences in option selection probabilities between social groups (D)</p> Signup and view all the answers

Which best characterizes the focus of Differential Distractor Functioning (DDF)?

<p>Measuring differences in option selection probabilities due to item wording (A)</p> Signup and view all the answers

Which of the following best describes Differential Item Functioning (DIF)?

<p>DIF occurs when two subjects with the same underlying ability but from different groups have different probability to answer question correctly (B)</p> Signup and view all the answers

What distinguishes Differential Distractor Functioning (DDF) from Differential Item Functioning (DIF)?

<p>DDF refers to the difference in the probability of option selection due to different distractors, while DIF occurs when two subjects with the same underlying ability but from different groups have different probability to answer question correctly (C)</p> Signup and view all the answers

What is the main focus of Differential Distractor Functioning (DDF)?

<p>Difference in the probability of option selection due to different distractors (C)</p> Signup and view all the answers

In the context of Differential Item Functioning (DIF), what does 'uniform' variation refer to?

<p>Uniform variation refers to constant differences in item difficulty across different groups of subjects (A)</p> Signup and view all the answers

What distinguishes Differential Item Functioning (DIF) from Differential Distractor Functioning (DDF)?

<p>DIF focuses on variation in item difficulty across different groups, while DDF focuses on differences in the probability of selecting an option by respondents from different social groups (C)</p> Signup and view all the answers

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