Hick's Law
Decision time rises with the number and complexity of choices offered, roughly logarithmically — fewer options decided faster.
Hick's Law (Hick, 1952, refined by Hyman) states that the time it takes someone to choose among options grows with the log of the number of options, not linearly. Doubling a menu from four items to eight doesn't double decision time; but going from four to forty does something much worse than the arithmetic suggests, because each additional option also has to be read, parsed, and compared against the others.
The design lesson isn't "always show fewer options" — it's that every option has a decision cost that a flat list doesn't distribute evenly. A 40-item dropdown pays that cost on every use, forever. Grouping items into categories, defaulting to the most common choice, or splitting a decision into two sequential smaller ones (pick a category, then pick within it) all reduce apparent choice count even when the total number of underlying options hasn't changed. This is the theoretical backing for Progressive Disclosure: hide the long tail until it's asked for, so the common case pays a low decision cost and the rare case still has a path.
It's also the law most often misused to justify over-simplification. Hick's Law describes decision time, not decision quality — a power user choosing among 40 keyboard shortcuts they've memorized isn't paying the log-scaling cost the law describes, because they're not searching, they're recalling. The law bites hardest on first encounters and on interfaces used casually, which is why onboarding flows and public-facing forms benefit from ruthless option-pruning in a way that expert tools (an IDE's command palette, a video editor's timeline) don't.
Fitts's Law and Hick's Law are often cited together because they cover the two halves of "time to act": how long to decide, and how long to physically reach the choice once decided.
See also10
Fitts's Law
The time to hit a target shrinks with its size and grows with distance to it — so make frequent targets big and close.
Design & Interface16 connections
Affordance
A property an object's design communicates about how it can be used, before any instruction is read.
Design & Interface12 connections
Gestalt Principles
A set of perceptual rules describing how the eye groups discrete elements into wholes before conscious analysis begins.
Design & Interface12 connections
Design System
A shared vocabulary of tokens, primitives, and rules that makes independent work converge.
Design & Interface22 connections
Above the Fold
The part of a page visible without scrolling, a newspaper idea carried onto the web, where it still matters for first impressions and loading but no longer means people won't scroll.
Design & Interface10 connections
Call to Action
The button or link that asks a visitor to take the next step, such as signing up or buying, whose wording, prominence, and placement are heavily tested and easily turned manipulative.
Design & Interface9 connections
Context Menu
A menu of actions for the thing under the pointer, opened by right-click or long press, which saves travel and narrows choices but is invisible until summoned, so it should never be the only route to an action.
Design & Interface12 connections
Wizard
An interface that guides a person through a complex task as a sequence of simple steps with Next and Back buttons, ideal for rare, unfamiliar tasks like installing software or filing taxes, and frustrating when imposed on experts doing something routine.
Design & Interface10 connections
Command Palette
A keyboard-summoned search box that finds and runs any command by typing part of its name, giving power users speed without forcing every feature into menus.
Design & Interface13 connections
Autocomplete
Suggesting completions while someone types, which needs prefix-friendly indexes, ranking by likely intent, and careful handling of latency, typos, and accessibility.
Data & Content14 connections
Linked from11
- Above the FoldDesign & Interface
The part of a page visible without scrolling, a newspaper idea carried onto the web, where it still matters for first impressions and loading but no longer means people won't scroll.
- AutocompleteData & Content
Suggesting completions while someone types, which needs prefix-friendly indexes, ranking by likely intent, and careful handling of latency, typos, and accessibility.
- Call to ActionDesign & Interface
The button or link that asks a visitor to take the next step, such as signing up or buying, whose wording, prominence, and placement are heavily tested and easily turned manipulative.
- Command PaletteDesign & Interface
A keyboard-summoned search box that finds and runs any command by typing part of its name, giving power users speed without forcing every feature into menus.
- Context MenuDesign & Interface
A menu of actions for the thing under the pointer, opened by right-click or long press, which saves travel and narrows choices but is invisible until summoned, so it should never be the only route to an action.
- Dark PatternDesign & Interface
An interface deliberately designed to steer users toward a choice that serves the business rather than the user.
- Feature CreepMethod
A product accumulates features one reasonable addition at a time until the sum is bloated, slow, and hard to use.
- Fitts's LawDesign & Interface
The time to hit a target shrinks with its size and grows with distance to it — so make frequent targets big and close.
- Gestalt PrinciplesDesign & Interface
A set of perceptual rules describing how the eye groups discrete elements into wholes before conscious analysis begins.
- Progressive DisclosureDesign & Interface
Show only what most users need now, and defer the rest behind an explicit action, instead of exposing everything at once.
- WizardDesign & Interface
An interface that guides a person through a complex task as a sequence of simple steps with Next and Back buttons, ideal for rare, unfamiliar tasks like installing software or filing taxes, and frustrating when imposed on experts doing something routine.