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Source: The Conversation (Au and NZ) – By Murray Goot, Emeritus Professor of Politics and International Relations, Macquarie University

Support for embedding an Indigenous Voice to parliament in the Constitution has fallen. The polls provide good evidence once you work out how to find it.

However, the voters who have shifted are not Labor voters or those who vote for the Greens – they are Coalition voters.

These voters have not shifted to the “undecided” column or joined the “don’t knows”, as some pollsters suggest; they have shifted to the “no” column.

This may not be fatal to the referendum’s prospects, but with the campaign barely begun and support slipping in the final weeks of other referendum campaigns, it is serious.

Comparing different polls that asked the same question

One way of establishing whether support has shifted is to compare polls taken by the same pollster using the same question, some time apart.

From May (59%) through August (57%) to October (55%), SEC Newgate reported a decline of four percentage points in favour of inscribing a Voice in the Constitution.

Between September (65%) and October (60%), Compass reported a decline of five percentage points in polling that was made available to me.

And from August (65%) to December (63%), a much longer period, Essential Media, whose polls are published in the Guardian, reported a smaller decline.

While the shifts were all in the same direction, their disparate sizes are difficult to reconcile. The task of estimating the overall shift, from the earliest date (May) to the latest (December), is more difficult still.




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Comparing two polls from the same pollster using different questions

Another approach is to compare polls taken by the same pollster, some time apart, even when the question used the first time differs from the question used the second time.

Recently, David Crowe, chief political correspondent for the Sydney Morning Herald, reported that support for an Indigenous Voice to parliament had fallen from 53% to 47%, though when forced to choose between “yes” and “no”, support had fallen less steeply, from 64% to 60%.

Crowe’s report was based on a comparison between the latest Resolve poll (December-January) and an earlier poll Resolve had run (August-September).

The first time around, the Resolve question rehearsed the prime minister’s proposed wording of the constitutional amendment; the second time around, it did not.

The first time, it avoided the word “enshrine”, a word some may have found off-putting. And the first time, it asked a standard “yes”, “no”, “don’t know” question, while the second time, it asked whether respondents would definitely vote yes, probably vote yes, were undecided or did not have enough information, would probably vote no or would definitely vote no.

In short, if support had slipped, this was not a set of questions that could show it.

The best way to see how far support has fallen

In the absence of a panel, where the shift in views of individual respondents are tracked, the best way of seeing how far opinion has changed is to compare the seven national polls conducted between late May and September (by Dynata, Essential, Resolve, Scanlon, and SEC Newgate) and the four conducted between October and January (by Freshwater, Morgan, Resolve, and SEC Newgate).

All of these polls meet acceptable standards for question wording and are similar in their range of response options.

This way, we can look at a larger number of polls, avoid the problem of overlapping timeframes when making comparisons, and allow differences in question wording and in response formats to wash out.

Across the two periods, the proportion of respondents saying “yes” declined from 58 to 51%, while the proportion saying “no” increased from 18 to 27%. These are averages across the two sets of polls; the medians are little different.

This suggests a decline of about seven percentage points in support for inscribing a Voice in the Constitution and an increase of around nine points in opposition.

Which voters have moved – and where have they moved

We can also compare the averages of the polls that break down results by party in order to see how support for the Voice has shifted among voters who support the Coalition, Labor, the Greens or other parties.

Between late May and September, support among Coalition voters averaged 45% in the six polls that broke down the results by party. Among Labor voters, support averaged 64%; among the Greens, 80%; and among others, 53%.

Between October and January in the three polls that broke the results down by party, support among Coalition voters averaged just 36%; among Labor voters it averaged 67%; among the Greens, 80%; and among others, 52%.

In short, while support among Coalition voters dropped by nine percentage points, on average, among other voters it remained steady or increased. If respondents in the two sets of polls shifted from “yes” to “no”, then Coalition voters must have shifted from “yes” to “no” – not to “don’t know”.

Moving to “don’t know” might have suggested they were open to coming back; moving to “no” suggests they are not, especially for Nationals happy to follow the party line. (Unfortunately, the polls do not distinguish Liberal voters, National voters and those in Queensland who vote for the LNP.)




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Parties as influencers

One of the questions keeping some in the “yes” campaign up at night is how much support would decline if the Liberals (or the Greens) came out against the Voice, or became increasingly divided.

Others have slept well in the belief that the standing of the major parties is so attenuated it no longer matters what the Liberals decide to say.

Just how far parties as opinion leaders have declined is one thing the referendum may help reveal. With the prime minister loud in his support, the opposition leader expressing his doubts, and the Nationals saying no, perhaps it has started to do so already.

The Conversation

Murray Goot does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. How much has support for the Voice fallen? It depends on how you ask – https://theconversation.com/how-much-has-support-for-the-voice-fallen-it-depends-on-how-you-ask-199002

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