What is the role of cognitive science in understanding user behavior in product design?

A signifier in design refers to any mark or sound that communicates important information to the user about a product's operation or state. For example, the "power" symbol on electronic devices is a universal signifier that indicates where to turn the device on or off.

When I first used a digital camera, the signifier of a small camera icon led me to correctly use the object. This icon was located on a button that, when pressed, allowed me to take a photo. The presence of this signifier made the camera intuitive to use and enhanced my interaction with the product. It reduced the learning curve and made the experience more enjoyable.

Signifiers play a crucial role in product design by guiding users on how to use a product correctly without needing extensive instructions or prior knowledge. They make products more user-friendly and improve the overall user experience.

The idea that users are not to blame for errors significantly shifts the responsibilities of a designer. It implies that designers should focus more on understanding the users' needs, behaviors, and limitations. They should design products that are intuitive, easy to use, and error-proof. This approach is known as "human-centered" design.

Designers must consider principles beyond just logic, such as psychology and cognitive science, to create products that align with how users think and behave. They should also consider the aesthetic aspect of the product to make it more appealing to the users. This approach ensures that the product is not only functional but also enjoyable to use.

In essence, the responsibility of a designer extends beyond creating a product that works. They are also responsible for ensuring that the product is user-friendly and minimizes the potential for user error.