Candela Tiny A/B Tester

This tiny A/B testing plugin shows different versions of page content to users based on the last character of their Wordpress username (which in the Lumen PBJ case is the lti_user_id provided by the user's LMS). Because of the way the LMS generates a lti_user_id, the username should always end with a 0-9 or a-f.

The plugin requires a minimum of two pieces of content: one marked as the original and the other marked as the alternative (see Instructions below for more detail).

• The original content will be shown to users who are not logged in or when the last character of their username:
  • is an even number (0, 2, 4, 6, 8)
  • does not match b, d or f
• The alternative content will be shown to users when the last character of their username:
  • is an odd number (1, 3, 5, 7, 9)
  • matches b, d or f

✍️ Instructions

Put the two versions of content you want to test in elements with classes of ab-test-original and ab-test-alternative, like so:

<p class="ab-test-original">This is the original version.</p>

<p class="ab-test-alternative">This is the alternate version.</p>

The classnames are not restricted to p elements and the HTML elements with these classnames do not need to match (i.e., one element can be a p and the other can be a div and all will work as expected).

Multiple page elements can be marked this way.

⚠️ Limitations

This implementation of the plugin:

• Only works on WordPress posts and pages (see is_single).
• Does not collect any data about user behavior and depends on a separate method of collecting and comparing data about users' behavior in order to complete the A/B testing.