According to Kath Straub and Susan Weinschenk, research shows that users generally find information faster in broad and shallow structured sites than the narrow and deep ones – as long as they are not extremely broad.
"Research comparing navigation efficiency through sites of varying depths and breadths broadly converges on the findings that users find roughly 16 (ungrouped) top-level links leading into 2-3 subsequent menus the most efficient, learnable and least error prone."
But several other factors are also thought to influence ease of navigation, such as clear and distinct labels, and effective sub-grouping of categories.
- The article Breadth vs. Depth
- June 26, 2003
See also: Navigation (46)