Ace the 2025 CPACC Challenge: Unlock Your Accessibility Superpowers!

The concept of "tolerance for error" in design refers to creating systems and products that minimize the risks or consequences of mistakes made by users. This principle helps to ensure safety and usability.

The design feature that exemplifies tolerance for error is appliances that shut off after a set time for safety. This feature is crucial because it prevents potential hazards, such as fires from unattended cooking appliances or overheating from devices that could cause harm if left on for too long. By automatically shutting off, these appliances protect users from making an error that could lead to dangerous situations, thereby promoting a safer environment.

In contrast, other options do not support this principle effectively. For instance, small buttons that are hard to press do not accommodate user error well, as they can lead to mis-touches and frustration. Devices without instructions can confuse users, increasing the likelihood of misuse. Lastly, complex machinery requiring extensive training poses a risk as it demands a high level of user competence, which does not allow for error.