Let’s say that Facebook would like to change the user interface of the composer feature (the posting box) to be more like Instagram. Instead of a box, Facebook would add a “+” button at the bottom of the page.

How would you test if this is a good idea?

What could be a potential risk when Facebook segments the results of the user interface change by market or demographic groups?

What could be a potential risk when Facebook segments the results of the user interface change by market or demographic groups?

Changing Composer I

A Simpson's paradox scenario might occur where the result in most markets differs from the aggregate result

User interface changes might not be applied consistently across all markets

The overall user engagement might decrease because the needs of one group are prioritized.

Facebook might lose a significant number of users

Facebook's revenue might drastically drop

What is the primary metric that Facebook should monitor if it decides to make the user interface of its posting feature more like Instagram's?

What is the primary metric that Facebook should monitor if it decides to make the user interface of its posting feature more like Instagram's?

Changing Composer II

Increase in the number of likes per photo post

Increase in the number of comments per photo post

Decrease in the number of text-based status updates

Increase in the number of photo posts per active user

Changing Composer

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