Frequently Asked Questions

Date of slack thread: 7/1/24

Anonymous: If I wanted to run a large number of copy variants, what’s the recommended way to do that? For example, on one page I have Headline, Description, and Button. If I have 5 options for each of those that can be combined together that’d be 125 variants (555). What would y’all recommend so that we don’t have to go in and manually create all of those?

Anonymous: Hey <@U073HQ81F8V> - it depends a bit on what you’re looking to test out (i.e. how much you want all combos): I’d generally advise against trying to run 125 variants - there’s a lot of room for false positives there (i.e. it’ll be 124 variants compared against the single control variant - with a 95% Confidence interval, you’d expect 6 or 7 to show as positive even if all were the same experience). I’d probably generally lean towards actually running them as separate tests, to get a bit more insight into if a single one of the Headline / Description / Button - are super impactful. Depending on the test - and what you’re trying to measure, this could actually be a pretty interesting use case for https://docs.statsig.com/autotune (our multi-armed bandit). If you’ve got 8 headlines you want to try out - you can really just set it and forget it if there’s a certain event you’re able to optimize around (i.e. clicks on a given button).

Anonymous: What we’re looking to understand is which combination of the three leads to increase in conversion. Would we be able to run multiple variables inside the same autotune? Or would we need to reduce the number to 8?

Vijaye (Statsig): I don’t think you’d want to deal with a combinatorial problem. My recommendation would be to treat these three properties as separate experiments while keeping the others constant. Find the one that’s best in each and then run a separate experiment picking the best of three to find the lift over baseline.

In most cases that should work well. There are other cases where it’s usually clear for the product team combinations that work well. In those cases pick fixed combinations and test them.