Creating a MaxDiff

Introduction

MaxDiff (Best-Worst Scaling) is a method for estimating preference or importance scores for a set of items, such as brands, product features, or claims. Rather than asking respondents to rank a large list, MaxDiff breaks it into smaller tasks. In each task, respondents choose the best and worst items from a subset, typically consisting of 4-6 items at a time. This approach makes the process more manageable for respondents and produces more accurate, reliable results.

MaxDiff outperforms traditional rating scales by offering clearer distinctions between preferences. Since respondents choose only the "best" and "worst" options — without relying on a response scale — it eliminates common biases seen in cross-cultural research.

MaxDiff Example

Creating a MaxDiff exercise

  1. Click any Add button.
    The survey authoring interface with the add buttons highlighted.
  2. Select MaxDiff.
    MaxDiff is highlighted in the add menu.
  3. Enter question text.
  4. Enter list items. Enter options one by one or paste in a list from a program such as Microsoft Word or Excel. There must be at least six items.
    A MaxDiff in authoring is shown with steps 3 and 4 above highlighted.

Labels

Modify MaxDiff labels in the settings panel. Three different labels are available for a MaxDiff.

  1. Best and worst labels: These label the scale on which a respondent considers and chooses the items in the list.
  2. Items label: This label provides context for the items respondents choose from. For example, you can use the label “Cookies” above a list of cookie flavors.
  3. Show exercise progress (number of tasks) & Task label: This counter indicates the respondent's progress throughout the exercise. The counter can be disabled, and the label field is optional.
The MaxDiff labels described above are highlighted.

Advanced settings

On the Advanced tab, you will find additional settings that are not required for preparing a basic MaxDiff exercise but are available if you wish to refine it further.

Exercise design

Discover offers a design recommender that generates a default design, meeting the criteria for effective MaxDiff exercise designs that achieve a high degree of precision at the individual level. However, if you wish to see how the design has been configured or modify it, you can do so here. To learn more about what goes into a design, please read our MaxDiff design settings article.

MaxDiff design settings can be configured on the second tab of the exercise settings.

Anchoring

In a MaxDiff exercise, respondents choose items from groups of typically 3 to 6 as either the best or the worst. These choices represent relative judgments among the items included in the study. Anchoring establishes a reference point, enabling researchers to assess whether a respondent perceives the items as important or not, or as a buy or no-buy in a more absolute context. Read the Anchored MaxDiff article to learn more.

Anchored Question

Related Content

HELP ARTICLE

This 10 minute video provides an overview of MaxDiff.

TECHNICAL PAPER

Best-worst scaling gives you better information with fewer respondents—it works better than traditional rating scales.