One third of respondents would favour Independence, while almost half would prefer to remain in the United Kingdom.
Outright independence is endorsed by a third of respondents, with the bulk of support coming from men and younger Scots.
Bailout of Royal Bank of Scotland and revenues from North Sea oil reserves are the most contentious topics.
Proportion of decided voters who will cast a ballot to reject the proposed alternative vote system increases by three points points since April.
Practically three-in-five decided voters would cast a ballot to keep the existing first past the post system.