**Top priority for sprint - we should aim to get this in the 14th Dec deployment train**
The data collected in T118041 could be interpreted by skeptics as saying:
1) Users do not know that they can open content (bad UX)
2) People are coming from search and unable to find the content they want e.g. via find in page
To explore this and provide answers we will run an A/B test in **stable** using a slight schema change. (note since we are already running on a 1% sample, only 0.05% will load the mobile site with sections open by default.
This will allow us to draw some conclusions such as:
* If users do not scroll headings into view => people are satisfied with lead section only to get the information they need
* Is toggling bad or good for users - e.g. if users see more sections when the sections toggled open it suggests we are disrupting the reading experience.
(plus more!)
[] The new schema has a "scrolled-into-view" event. This should be triggered when the top of the heading is scrolled into the user's viewport.
[] The new schema has a "isTestA" field - this should be true for 50% of the bucketed users.
[] When isTestA is true, sections should not be collapsed by default on the mobile site.