Tag: accuracy

Writing good multiple-choice questions is challenging. Tricky or verbose questions can reduce the test item’s reliability and validity, while a poor selection of answer choices can make a question either far too easy or incredibly difficult. A question that suffers several common pitfalls might even work against the learning outcomes it is trying to measure. Fortunately, researchers and assessment experts have identified some common guidelines for creating more equitable and reliable multiple-choice assessments. In this guide, we’ll walk through seven tips for writing more effective multiple-choice test items.

The scope of this guide is focused specifically on authoring multiple-choice questions. If you’d like to dig into when to use multiple-choice assessments, as well as recommendations for scaffolding, testing in online environments, and providing feedback, check out this other CATL blog post on general considerations for creating impactful multiple-choice assessments.

Before getting into the tips on writing questions, we’ll review the anatomy of a multiple-choice question and outline some common language that we use throughout this guide.

Table of Contents

• The Anatomy of a Multiple-Choice Item
• Tips for Writing Effective Multiple-Choice Questions
  • Tip #1: Tie each item to a learning outcome
  • Tip #2: Create a specific, clear, and succinct stem
  • Tip #3: Avoid using negatives in question phrasing
  • Tip #4: Use plausible distractors
  • Tip #5: Use homogeneous phrasing and formatting for alternatives
  • Tip #6: Avoid using none-of-the-above or all-of-the-above
  • Tip #7: Create questions with only one correct alternative
• Questions?
• Additional Resources

The Anatomy of a Multiple-Choice Item

Throughout this article, we will use the following terms and definitions when referring to the parts of a multiple-choice question:

• Item: A question and its answer choices as a unit
• Stem: The posited question that respondents are asked to answer; often phrased as a question, but can also be a statement (e.g., fill in the blank)
• Alternatives: A list of suggested answers that appear after the question stem; comprised of several incorrect answer options and one (or more) correct or best answer(s)
• Distractor: An incorrect alternative

Example of a multiple-choice item, its stem, and the alternatives

Source: Vanderbilt Center for Teaching and Learning

Tips for Writing Effective Multiple-Choice Questions

Most of the recommendations in this guide have been adapted from How to Prepare Better Multiple-Choice Test Items: Guidelines for University Faculty Simple (Burton et al, 1991) and Developing and Validating Multiple-choice Test Items (Haladyna, 2004). We’ve distilled down these long-form documents into a few simple guidelines that align with current recommendations from experts at other centers for teaching and learning (see “Additional Resources”). If you are interested in learning more about the research behind these suggestions, we encourage you to check out one or both of the resources linked above.

Tip #1: Tie each item to a learning outcome

In order to maximize an assessment’s validity and reliability, each multiple-choice item should be clearly aligned with one of the assessment’s learning outcomes (and, by extension, the course learning outcomes). Generally, it is recommended to have each item tied to only one outcome each. However, in the case of items that assess higher order thinking and present complex problems or scenarios, it is possible that a multiple-choice item may assess more than one outcome.

Tip #2: Create a specific, clear, and succinct stem

A straightforward, clear, and concise stem free from extraneous information increases a multiple-choice item’s reliability. When writing and revising your question stems, it is a good practice to ask yourself if there is a simpler or more direct way to rephrase a question. Overly wordy stems rely on students’ reading comprehension, which is usually not one of the intended outcomes of the assessment. Likewise, confusing or ambiguous stems can be accidentally misleading. Ideally, a student who has mastered the target outcome should be able to answer the question posited even without the alternatives present.

Tip #3: Avoid using negatives in question phrasing

It is usually best to avoid negative phrasing in question stems, such as asking students to identify which alternative does not belong. Negatively phrased stems tend to be less reliable in assessing students’ learning than stems that ask students to identify the correct answer. The exception to this guideline is in cases when knowing what not to do is key, such as questions related to safety protocols. If you do choose to include a negative qualifier, use bold or italics to emphasize the negative word and make sure that you don’t create a double negative with any of the alternatives.

Tip #4: Use plausible distractors

Good distractors need to appear plausible to students that have not met the target learning outcome, but not so tricky that they could be argued as correct answers by a test-taker that has met the learning outcome. When you are writing a multiple-choice question it is often useful to write the stem first, then the correct answer first. Once you have decided on these two pieces, formulate 2-4 distractors based on common student misconceptions. If you can’t think of another “good” distractor for a set of alternatives, it is usually better to have fewer alternatives than to include extra alternatives just for the sake of consistency.

Tip #5: Use homogeneous phrasing and formatting for alternatives

Small typos, inconsistencies in tenses or phrasing, or changes in text formatting can accidentally provide clues about which alternatives are the distractors and which are correct answers. Savvy test-takers can pick up on these inconsistencies and use this information to deduce the correct answer even if they have not achieved mastery for the desired outcome, so keep an eye out for these things as you proofread your exam. If you notice formatting inconsistencies in your Canvas quizzes, you can use the Rich Content Editor to remove all formatting and set the selected text to Canvas’s defaults.

Tip #6: Avoid using none-of-the-above or all-of-the-above as alternatives

Questions that provide “all of the above” or “none of the above” as alternatives are generally less reliable for assessing outcomes than a multiple-choice question with mutually exclusive alternatives. The table below outlines the use cases for “all of the above” and “none of the above” along with why they are flawed for reliable assessment in each instance. If you can’t think of another distractor while drafting a question, remember that it is okay for some questions to have fewer alternatives.

Use of “all of the above” and “none of the above” 

Alternative	Weakness
“All of the above” as the answer	Can be identified by noting that two of the other alternatives are correct
“All of the above” as a distractor	Can be eliminated by noting that one of the other alternatives is incorrect
“None of the above” as the answer	Measures the ability to recognize incorrect answers rather than correct answers
“None of the above” as a distractor	Does not appear plausible to some students

(Adapted from How to Prepare Better Multiple-Choice Test Items: Guidelines for University Faculty, Brigham Young University)

Tip #7: Create questions with only one correct alternative

Like none- or all-of-the-above alternatives, asking students to identify multiple correct alternatives is a less reliable form of assessment than an item with only one correct answer. Multiple-response questions are also reliant on confusing grading calculations, since selecting an incorrect alternative “cancels out” a correct selection (this Canvas guide goes into more detail about how Multiple Answer questions are auto-graded). And, in questions with more incorrect than correct answers, students can still score points by selecting no answers at all!

A straightforward multiple-choice item with only one correct answer and mutually exclusive alternatives is a more reliable way of discerning whether a student truly knows a concept or is guessing. Another option is to turn a multiple-answer question into a series of true/false questions, which will provide a more reliable picture of students’ understanding and a more valid grade for their efforts.

Questions?

Want more tips for writing multiple-choice questions? Looking for someone to help brainstorm outcome-aligned questions with? CATL is here for you! Reach out any time to set up a meeting or send us your questions at CATL@uwgb.edu.

Additional Resources

• TeAch Tuesday TOP 10 – Writing Multiple-Choice Questions (CATL YouTube video)
• Creating Intentional and Impactful Multiple-Choice Assessments (CATL blog post)
• How to Prepare Better Multiple-Choice Test Items: Guidelines for University Faculty (Testing Services and The Department of Instructional Science – Brigham Young University, PDF guide)
• Developing and Validating Multiple-choice Test Items (Thomas M. Haladyna, book)
• Writing Effective Multiple-Choice Questions (UW Extended Campus, PDF guide)
• Writing Good Multiple Choice Test Questions (Vanderbilt University, web guide)
• Designing Quality Multiple Choice Questions (Poorvu Center for Teaching and Learning – Yale, web guide)