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StatsToDo : Item Analysis for Multiple Choice Questions Explained Page

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Item Analysis for Multiple Choice Questions Program Page

Introduction Example Discussions References
This page provides explanations and support for item analysis of multiple choice questions from the Item Analysis for Multiple Choice Questions Program Page

Item analysis is a tool kit used during the development of multiple choice questions. It analyse each question within the context of the whole test, and estimates two characteristics of how difficult the question is, and how well it discriminates (separates) those who scores low and high in the test.

Nomenclature and clarifications

Users should be aware of the following nomenclature and data presentations used on these pages in StatsToDo
  • A row in the data, a subject, and a response are the same thing, and refers to answers of all questions from an individual in the data
  • A column in the data, a question, and an item are the same thing, and refers to answers of all responses to a question
  • A cell in the data table, and an answer are the same thing, and refers to the answer provided by a response to a question
  • By default, StatsToDo displays results of calculation with 4 decimal point precision. On this page, to improve brevity and clarification 2 decimal point precision are presented
  • Proportions and probabilities are displayed as a value between 0.0 and 1.0. Users can multiply this by 100 to transform the results to percent(%).
The other panels on this page are
  • Example: describes the calculations step by step and explains the results, using the default example data
  • Discussions and References: General discussions on item analysis and references