Fife could hold the key to predicting the outcome of the referendum.
Professor of politics at Strathclyde University, John Curtice, said the social demographic of the region makes it a good barometer for the result.
With areas of both high affluence and deprivation, Fife almost provides a microcosm of Scottish society.
Professor Curtice said both deprivation and the vote of English-born residents would have an impact on the final outcome.
“Fascinatingly, the one area that seems closest to the Scottish average, on both of those criteria at least, is Fife.
“Also, if you look at the May 2014 European elections, Fife, on 28%, was only slightly below the Scotland-wide average for the SNP of 29%.
“So if anybody can pick out the result then maybe Fife will end up being the place closest to the Scottish average.”
The Yes campaign will hope to pick up good results in Glasgow and Dundee, Professor Curtice said, while Edinburgh may prove tougher due to its more middle class population.