Problem summary

The user needs to browse through a set of items and possibly select one of them.

Solution

Arrange a set of items on a horizontal line where each item preferably has an thumbnail image attached (or the item is only represented by the image). Even though the list of items is long, only 3-8 images are shown at the same time.

If the user wants to view the rest of the items on the list, he or she must click one of the navigational controls such as an arrows pointing either left/right or up/down. Once one of the arrow is clicked, the subsequent “view” is loaded, a transitional animation moves the requested item into focus. The user can in this way browse the list of items back and forth in a circular fashion – hence the name Carousel.

Rationale

A carousel optimizes screen space by displaying only a subset of images from a collection of images in a cyclic view.

The navigational controls on a carousel suggests additional content that is not currently visible, this encourages the user to continue exploring. The carousel pattern can in this way be used as an extra incentive for the user to browse through all items of the list, as we as humans do not feel comfortable by not being aware of the “full picture”.

As the carousel is circular, the start of the list will be shown after the user has reached the end. This behavior encourages the user to continue browsing through the list.