Interesting data from last weekend’s Elections, Parties and Opinion Polls (EPOP) conference in Cardiff.
This slide shows the conclusions from field experiments in Southampton Itchen carried out with the Labour campaign ahead of the 2015 general election by Florian Foos:
Within the second bullet point there was also a slightly bigger impact for canvassing by the candidate herself than for canvassing by other Labour helpers.
One thing we don’t know is how quickly, or not, the boost to party support from canvassing wears off or gets cancelled about by activity from other parties. Even so, this looks promising evidence that high quality doorstep conversations make an impact and which adds to the more anecdotal evidence as well as the evidence about turnout.