12 Questions
What is the main purpose of assessing how well individual items perform in a test?
To determine if good students perform better than poor students
Why is high reliability necessary for high test validity?
High reliability is a prerequisite for high validity
What does it mean if good and poor students have similar chances of getting a high score on a test?
The test lacks validity
What does the text suggest about item analyses in relation to test validity?
Examining items helps improve test validity by enhancing reliability
Why might higher reliability not necessarily lead to higher validity in tests?
Consistency may still target the wrong outcomes
What can discovering how well individual items assess intended learning outcomes help identify?
Validities of the test items
What is the purpose of item analysis in a test?
To estimate the difficulty of each test item
How is the index of difficulty of an item calculated?
$\frac{n_H}{N}$
In item analysis, what is considered a 'very difficult' difficulty index range?
0.00-0.20
What does positive discrimination imply in a test?
Bright students perform significantly better than poor students
What does the discriminating index measure in item analysis?
The difference between high and low group performance on an item
What is the main benefit of evaluating the effectiveness of distracters in test items?
To identify attractive incorrect alternatives
Learn about assessing the effectiveness of a test by analyzing how well individual Rems perform. Understand the importance of good items being easier for good students to answer correctly compared to poor students. Explore the implications of test results when good students are not more likely to get high scores.
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