Miller's Law

The average person can only keep about seven (plus or minus two) items in their working memory at one time. This is often referred to as the "magical number seven."

In design, this principle is often misunderstood. It should not be used as a strict rule to limit the number of choices to seven. The key takeaway is that human working memory is limited, and designers should organize content to be easily processed.

The main application of Miller's Law is to chunk information. By grouping related items into smaller, distinct chunks, we can help users process, understand, and remember information more effectively.

It's also important to remember that short-term memory capacity varies from person to person and depends on factors like prior knowledge and the context of the situation. Therefore, the "magical number seven" should be considered a guideline, not a rigid constraint.