A/B Testing & visit count

@Valentin_Shamsnejad wrote:

I have an A/B testing system (a RoR gem named split) that redirects the visitor (302) on either the page A or the page B by tossing a 50/50 coin. This systems has its own basic stats, which says that our visits are equally distributed between A and B.

We are tracking our pages with Piwik, to be able to retrieve more useful informations about our visits, but we encountered a serious issue : Piwik counts more than twice visits on the B page than on the A page.

Does anyone have any idea about why I have 2x more visits on B page in Piwik, when split gives me equal redirect counts ?

• Is it the redirect 302 that is generating more visits ? (piwik tracking should not be loaded before the redirection, so I don't think so)
• Or it is my Piwik API requests that are badly crafted ? (That is way much more possible)

Here is the Piwik API request details :

• I use the Piwik API to retreive the stats with the method VisitsSummary.get
• The pages are named :
  • Page A : http://my_domain.com/my_page
  • Page B : http://my_domain.com/my_page-2

• I crafted 2 segments to retrieve the stats of both pages :

  • Segment A : segment=pageUrl==http://my_domain.com/my_page,pageUrl=@http://my_domain.com/my_page?
  • Segment B : segment=pageUrl==http://my_domain.com/my_page-2,pageUrl=@http://my_domain.com/my_page-2?

• Example of a full API request, for page B : http://piwik.seniormedia.fr/?module=API&format=JSON&token_auth=xxx&method=VisitsSummary.get&idSite=1&period=day&date=2016-02-15,2016-02-15&segment=pageUrl==http://my_domain.com/my_page-2,pageUrl=@http://my_domain.com/my_page-2?

Any help will be welcomed.

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