Input is missing context-sensitive help

Rule

Forms that require user input MUST have clear labels that tell the user everything they need to know to successfully fill out the field or provide that information via an accessible help mechanism.

Background

Some users with disabilities may be more likely to make mistakes than users without disabilities. Context-sensitive help needs to be provided when the label is not sufficient to describe all functionality. Using context-sensitive help, users find out how to perform an operation without losing track of what they are doing.

How to Fix

Fix this issue by providing contextual help. Techniques include:

1. Clear labels that tell the user everything they need to know to successfully fill out the field.
2. Text instructions at the beginning of a form or set of fields.
3. Tooltip-style pop-ups.
4. A link to a help page that is specific to the form.