Nearly a week ago, I argued, in relation to the equal marriage survey that “most people will either respond straight away or not at all.” That was supported by an Essential poll, taken from Wednesday to Friday of the first week in which 9 per cent of those polled said they’d already responded. Since the first surveys were mailed out to rural areas on Monday, that looked like a rapid response. But the most recent Newspoll, conducted from last Friday to Monday reported only a 15 per cent response rate, even though nearly all those polled would have received the ballot. This didn’t reflect apathy or a boycott – the vast majority said they would definitely respond.
I don’t have any good reason to think Newspoll is drastically wrong on such a straightforward question, but I also can’t understand the result. Perhaps this is another example of the (apparently spurious) Pauline Kael fallacy, but everyone I know has already voted (mostly, though not exclusively, Yes). I’d appreciate any insights on this.
Update Essential has a poll out with 36 per cent saying they have already responded, 72 per cent of those saying Yes. No details yet on when the sample was taken, but it must overlap pretty closely with Newspoll. That’s a bigger difference between polls than I can recall seeing on any topic.
Further update Peter Brent in Inside Story quotes* leaked internal polling from the Yes side, reporting that 65 per cent of those polled had already returned their surveys. He describes this as “flabbergasting”, but it’s in line with my expectations. Still, the puzzle of how polls asking a simple factual question could yield such radically different answers remains unresolved. He makes the point that there’s always a reason for a leak, but this obviously isn’t what the Yes campaign would want to leak, since it implies that Yes has already won, or nearly so.
* Brent doesn’t give a link, but I dound the story here.