Single-Select Dropdown

Overview of the Single-Select Dropdown data classification tool on Ango Hub.

The single-select dropdown labeling tool allows you to ask labelers close-ended questions with one right answer.

The Single-Select Dropdown tool is supported across the Audio, Image, Video, DICOM, Medical, PDF, Text, LLM, and Markdown labeling editors.

The Single-Select Dropdown Labeling Tool in Ango Hub

How to add a Single-Select Dropdown tool to your project

From the project’s Settings tab, enter the Label Set section.

Click on Add Category. From the list that appears, click on Single-Select Dropdown.

A new row will appear named Single-Select Dropdown. Click on it to expand it.

Give your single-select dropdown tool a title and description. From the Options text box, you can enter the answers. Press Enter after entering each one.

Enable the Required toggle if you want to force labelers to answer it. When the toggle is disabled, labelers will be able to save and move to the next asset without answering this question.

If you would like to ask labelers further questions, for example, if you want to show a Text tool when labelers answer Other, click on Add Classification and add a further question. More on nested questions here.

Differences between Radio and Single-Select Dropdown

The tool is functionally identical to the Radio tool, with the main difference being visual.

The major benefit of the radio tool over the dropdown tool is that it can be answered by a labeler with a single click, instead of the two required for dropdowns. The downside is that it cannot easily display large numbers of items. Here’s an example of how to ideally use radios and dropdowns:

When the number of possible answers is limited, we recommend choosing the Radio tool. For questions with a significant amount of more answers, the dropdown tool is preferable.

Differences between the Single and Multi-Select Dropdown tools

In single-select dropdowns, labelers can only select one answer. In multi-select dropdowns, labelers can select more than one.