# Adding Social Sign-In to a Signup Form A/B Test

Page: https://alidemirbas.com.tr/en/lab/ab-test-library/tests/adding-social-sign-in-to-a-signup-form-ab-test

## Hypothesis

If the signup form offers a social sign-in option next to email, visitors who do not want to create yet another password may find it easier to finish registering. More finished signups would show up in the account registration completion rate, though users who forget which method they chose may struggle to sign in again.

## When to run this test

The password step may be wearing visitors down if form analytics shows abandonment clustered on the password field, attempts keep failing password rules, or feedback complains about creating yet another password. With a social option, some visitors should pick their social account and finish registering in fewer steps. Before launch, make sure the button copy states plainly what information the provider shares; if drop-off really comes from verification emails that never arrive, fix that first.

## Primary metric

**Account registration completion rate**: Compare completed registrations among eligible users assigned before choosing a sign-up method.

## Other metrics

- **Repeat sign-in success rate**: Compare successful repeat sign-ins over the same follow-up period.
- **First post-registration action rate**: Compare completion of the predefined first product action over the same period.
- **Sign-in-related support contacts**: Track requests about using a sign-in method or recovering an account.
- **Email verification completion rate**: Track email verification in both arms; collecting an email address does not imply consent to marketing.

## What to check before and during the test

- **Option**: Add the predefined social sign-in provider or provider set while keeping email registration available.
- **Keep constant**: Keep email fields, provider permissions and security steps unchanged.
- **Return access**: Check whether users can identify their method and sign in again.
- **Audience**: If already defined, review individual and business contexts separately.
- **Separate tests**: Test provider count and button hierarchy separately.

## What to watch when reading the result

- A higher account registration completion rate is not a win on its own. Using one follow-up window for both arms, check the first post-registration action rate, repeat sign-in success rate and sign-in-related support contacts; if activation slips, do not ship.
- Apply the result only to the provider set you tested on this signup form. If individual and business contexts were defined in advance, read them separately. A completed email verification or a collected address is not consent to marketing.
- Repeat sign-in shows up some time after registration, so do not decide before the follow-up period ends. If the registration gap is small or unclear, take the per-variant sample for registration completion from the [sample size calculator](https://alidemirbas.com.tr/en/calculators/sample-size-calculator), divide it by the sign-up page visitors each arm gets per day to find the run time, and add the follow-up window on top of it.

## Frequently Asked Questions

### Does higher signup completion settle the result?

Use valid signup completion as the primary outcome. Apply the agreed activation and repeat-login guardrails over equal windows. A signup increase alone does not establish better ongoing access.

### What if users hesitate about sharing social-account data?

Explain the data requested accurately. Personal accounts may be inappropriate in some work contexts. Examine predefined consumer and business groups without inferring them from variant behavior.

### How should email verification be interpreted?

Define whether the provider supplies verified email information and how the app uses it. Compare valid accounts across assigned users. Account creation and possession of an email address do not establish marketing consent.