## What is distracter analysis?

Definition: The distractor point biserial correlation measures the reliability of each question’s answer choices. You would expect students who score well on the test to select the correct answer choice for each question. An effective distractor is one that is chosen by students who score low on the test overall.

## What is Item discrimination in testing?

Item discrimination refers to the ability of an item to differentiate among students on the basis of how well they know the material being tested. Various hand calculation procedures have traditionally been used to compare item responses to total test scores using high and low scoring groups of students.

## How would you determine the discrimination level of a test item?

The Discrimination Index (D) is computed from equal-sized high and low scoring groups on the test. Subtract the number of successes by the low group on the item from the number of successes by the high group, and divide this difference by the size of a group. The range of this index is +1 to -1.

## What is positive discrimination index?

POSITIVE DISCRIMINATION INDEX An item is correctly answered by superiors and is not answered correctly by inferiors. The discriminative power range from +1 to -1. 13. NEGATIVE DISCRIMINATION INDEX An item is correctly answered by inferiors and is not answered correctly by superiors.

## What is discrimination power?

in statistical analysis, the ability of a scale to differentiate significantly between categorical scale responses.

## What is the difficulty level?

Wiktionary. difficulty level(Noun) The relative difficulty of completing a task or objective. difficulty level(Noun) One of the difficulty settings in a video game.

## What is item difficulty and item discrimination?

The two most common statistics reported in an item analysis are the item difficulty, which is a measure of the proportion of examinees who responded to an item correctly, and the item discrimination, which is a measure of how well the item discriminates between examinees who are knowledgeable in the content area and …