Online v Phone at GE2015: Looking at all the polls it’s hard to conclude anything other that the phone ones “won”
A possible guide to EU referendum polling?
As we all know with the final polls there was very little difference between those that carried out their fieldwork by phone and those that did it online. But this was very much out of keeping with what had happened throughout the formal campaign.
The chart above illustrates this graphically. 70% of the phone polls had CON leads against just 26% of the online ones. At the same time 56% of the online surveys reported LAB leads against just 10% of the phone ones.
Given the general election outcome it is hard to conclude other than the phone pollsters “won”.