The Practical Ceiling for a Chunked Top-Level Menu
A team chunks a broad, 40-item flat menu into labeled top-level groups to reduce the Hick's Law cost of scanning it.
Per this subject's practical guidance, roughly how many top-level items should a well-chunked menu land on?
The correct answer is "Roughly 5-9 items."
This subject's depth-vs-breadth guidance names 5-9 top-level items as a common practical ceiling for chunking: the real skill isn't choosing between "6 levels deep" and "40 items flat," it's grouping a broad set of options into a few well-labeled categories within that range. Landing meaningfully outside it — say, 20 top-level groups — just relocates the same Hick's Law scanning cost to a different, still-too-crowded screen.
The distractors miss the cited range: 3 is tighter than the guidance calls for and would force awkward, overly broad categories just to hit the number; 15-20 doesn't remove the Hick's Law cost at all — grouping only helps because each individual decision (which group, then which item) stays small, and a 15-20 item top level recreates the original overwhelm one level up; and "as many as fit on one screen" ignores that the constraint here is decision time, not physical screen space.
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