# Choice overload in nav — dev spec
Site: yahoo.com · Priority 6 · High · Effort: Medium (2-5 days)

## Problem
The homepage navigation presents 212 links and 141 buttons, overwhelming users with too many choices and increasing cognitive load, which can lead to decision paralysis and reduced engagement.

## Evidence (from the live site)
> N_links: 212, buttons: 141, nav_items include multiple 'Skip to' links and many content categories, but no clear hierarchy.

## Current state
cta: Sign in; notes: Navigation is cluttered with numerous links and buttons, making it hard for users to find what they need.

## Required change
h1: Yahoo; cta: Sign in; notes: Simplify navigation to core sections (News, Finance, Sports, Mail) and use a mega-menu with clear categories, reducing link count to under 50.

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Simplify navigation to core sections (News, Finance, Sports, Mail) and use a mega-menu with clear categories, reducing link count to under 50.
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_choice_overload_in_nav` on interaction with the changed element
- Verify the event fires in BOTH variants before opening traffic

## Test plan
- Two-proportion z-test, 95% significance, 80% power
- 315,206 visitors per variant to detect a 5.0% relative lift
- Run at least one full business cycle; duration depends on traffic

## Rollback
Feature-flag the change; revert if the primary metric drops for 3 consecutive days.