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Category & Listing

Variant Selector on Product Cards A/B Test Example

A color or size selector on the product card may help shoppers choose a suitable variant without opening the detail page.

  • Category listing
  • Purchase conversion rate

Control vs Variant

Absent on one side, present on the other.

Changed
Presence
Page
Category listing
Difference
added

Hypothesis

The extra controls take space, especially on mobile, and may lead to selection errors.

How to run this test

Primary metric

Purchase conversion rate

Compare purchases among eligible visitors assigned to the variant-selector experience.

Other metrics

  • Listing-to-product click-through rateCheck whether visits to product pages change.
  • Return-to-product-page rateReview rapid returns as a possible selection issue; the return alone does not explain why it happened.
  • Return rateTrack whether selecting the wrong variant increases returns.
  • Page load timeMake sure additional images do not slow the page.

What to check before and during the test

  • SelectorAdd a predefined variant selector to eligible product cards.
  • BehaviorPredefine the available options and image-preview behavior, then keep them fixed.
  • Keep constantKeep card size, product order and other card details unchanged.
  • Selection carryoverCarry the selected variant through to the product page.
  • MobileCheck touch targets; test option count or preview behavior separately.

Setup mistakes to avoid

  1. 1Do not make an out-of-stock variant appear selectable.
  2. 2Do not change variant display and card size together.
  3. 3Keep touch targets above the accessibility minimum.
  4. 4Make sure a selection made on the card carries through to the product page.
  5. 5Do not generalize a result from one category to categories without variants.