It was, said Prof Curtice, "just a reminder that the SNP's political antennae are not perfect".
Elections expert Professor John Curtice, of Strathclyde University, said it could be the worst turnout ever.
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Mr Curtice has run a simulation of a future election under the Jenkins proposals.
But Professor John Curtice, of Strathclyde University, told the programme that Mr Cameron had equivocated over the matter.
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This tendency was confirmed by two more academics, John Curtice and Michael Steed, who studied the 1992 election.
The cost would be too, says John Curtice, an election-watcher at Strathclyde University.
Polling expert Prof John Curtice said the challenge would be to ensure all 16 and 17-year-olds got to vote.
But Mr Curtice finds no evidence that the rebel Tory papers, including the Sun, took their readers with them.
Voters decide whom to vote for in a broad-brush way, says Mr Curtice.
ECONOMIST: Why the campaign will count in a contest that matters
The surge in support for UKIP has taken Britain into uncharted political waters, according to polling expert Prof John Curtice.
John Curtice, of the Centre for Research into Elections and Social Trends, has been studying agricultural politics for The Economist.
FPTP, which Mr Curtice thinks costs them 80 seats, because of the way their vote is spread across the country.
But Prof John Curtice, professor of politics at the Strathclyde University, said he had doubts about what impact the party could have.
One, by John Curtice and Holli Semetko, two academics, found little effect.
"Clearly, Blair's authority in the party, although not smashed, has shown its limits, " Professor John Curtice, of the University of Strathclyde, told Reuters.
The problem, says John Curtice, of Strathclyde University, is that the consequences of a yes vote remain uncertain, which irks women more than men.
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The Economist's May 15th issue will include our annual analysis of the results, prepared by Professor John Curtice of the Centre for Research into Elections and Social Trends.
According to calculations by John Curtice, an academic psephologist, they would need to poll ten percentage points more than Labour at the next election to win an overall majority.
Prof John Curtice, of the Scottish Centre for Social Research, which produces the attitudes survey, said the last 12 months had seen the independence debate top the Scottish political agenda.
Yet according to John Curtice, a psephologist at Strathclyde University, one of Labour's worries in the election campaign is that its voting support is softer and less committed than the Conservatives'.
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But as antipathy to the Tories seems to have waned a bit since Mr Cameron sought to modernise his party, tactical voting may well hurt them less than in the past, says Mr Curtice.
ECONOMIST: Why the campaign will count in a contest that matters
But John Curtice of Strathclyde University says that the marginal increase in distrust of politicians is too small to explain why the government won the 1998 London mayoral referendum but lost the north-east referendum.
John Curtice, an electoral specialist at Strathclyde University, says that the polls are not yet picking up tactical voting, because third-party supporters generally make up their mind to vote this way late in the day.
ECONOMIST: Why the campaign will count in a contest that matters
The only real success was achieved with an all-postal ballot, which, according to John Curtice, professor of politics at the University of Strathclyde, raised the turnout by about 10% in the wards where it was used.
John Curtice, professor of politics at Strathclyde University, told BBC Radio 4's Today programme there were also often tensions within parties between individual MPs trying to defend their seats - and parties trying to think about the "bigger picture".
To allow for this, The Economist asked John Curtice, of the Centre for Research into Elections and Social Trends, to calculate how much each party's support has risen or fallen at each by-election compared with the May 1995 round of elections.
The Environment, Food and Rural Affairs (at 2.30pm) gets the views of water companies on the water white paper and the Scottish Affairs Committee (at 2.30pm) hears from leading political academics including Vernon Bogdanor and John Curtice, plus pollster Peter Kellner, the Scotland referendum.
John Curtice, professor of politics at Strathclyde university, says a swing from Labour to the Conservatives of 1.5%, spread evenly across the whole country, would give the two parties identical shares of the vote, but, on current boundaries, leave Labour with an overall majority of 22.
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