bmuller/bandit — pull request #2 by mnacos (2012-01-26 14:23:31+00:00)
Title: increase participants counter only if user does not have a cookie already

If you increase the participants count on every impression/view you are not really tracking the effectiveness of a given alternative. For example, person A visits index page and gets served alternative 1, and signs up immediately (1 participant, 1 conversion). Person B visits index page, gets served alternative 2, browses the web site a little more, goes back to the index page (still seeing alternative 2), is not sure, browses around some more, goes back to the index page then signs up (3 participants, 1 conversion). It seems wrong. People have different browsing habits.

Besides this, bandit is a great!

thanks,

Michael