The federal Conservatives continue to garner higher levels of support than their political rivals, a new poll suggests — in results consistent with broad trends seen in other types of polling.

The Environics poll released exclusively to CBC News follows the trend of other polls, which, regardless of their methodology and questions, put the Tories in the lead, followed by the Liberals, the NDP and the Bloc Québécois.

The new poll shows the Conservatives with the support of 35 per cent of decided voters, while the Liberals trail with 32 per cent of the decided vote.

The NDP holds 15 per cent of decided voters and the Green Party stands at six per cent, according to the Environics poll. Nine per cent would vote for the Bloc Québécois nationally, which translates into 37 per cent support in Quebec.

Thirty-one per cent of respondents said they did not know who they would vote for, while eight per cent said they would not vote at all.

But the surveys suggest that depending on the specific questions and the methodology, differences arise in the level of Conservative support.

The Environics poll suggests the Tories have a narrow three-point lead over the Liberals when respondents were asked which party's candidate they would vote for if a federal election were held today.

The results of that poll were based on live telephone interviews and the question focused on choosing a party's candidate.

But a recent EKOS poll, which suggested the Conservatives have a 10-point lead over the Liberals, used interactive voice recognition technology (IVR), meaning respondents punched their preferences into a keypad, rather than speak to an operator.

The poll question also differed in that it asked party preference: If a federal election were held tomorrow, which party would you vote for?

A Leger poll suggested the Tories had an 11-point lead over the Liberals. That poll was conducted over the internet and included the names of the party leaders in the voter intention questions alongside their party names.

The Environics telephone poll of 1,918 eligible voters was conducted July 5-8 and has a margin of error of plus or minus 2.2 per cent 19 times out of 20.