Forty minutes into the vice-presidential debate Thursday night, Biden continues to hold the upper hand, according to an instant survey of viewers. About two thirds of the audience polled said Joe Biden was winning, while 36 percent said Paul Ryan was ahead.

The survey, conducted for HuffPost by OverTheShoulder.com, is dubbed a "Smartphone Town Hall" and draws on a sample of more than 300 voters from across the political spectrum. The members of the panel are watching the debate live and answering questions sent to their phones.

Clarification: Although participants for the survey were recruited from around the country, the survey was not a random sample, nor should it be considered representative of the U.S. population or debate watchers.

After focusing on foreign policy at the beginning of the debate, the candidates moved to sparring over economic issues, including Social Security and Medicare. Biden's frequent laughter and interruptions of Ryan lent to the perception that he commanded the stage. Half an hour into the debate, 69 percent of watchers said Biden was dominating the forum, compared to 31 percent who said the same of Ryan.

The panel said both candidates seemed about equally calm, with 53 percent saying Biden appeared more relaxed, and 47 percent saying Ryan seemed more so.

The clear winner of the debate so far may be Martha Raddatz. Eighty-eight percent of panelists said she was doing a good or great job as moderator.

Over The Shoulder generally focuses on large, instant focus groups for corporate clients.

A separate panel of several hundred HuffPost readers is also watching the debate live and responding to questions. Those results will be available after the debate.

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  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin shake hands after the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin shake hands after the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin gesture after the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin gesture after the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Joe Biden, Paul Ryan

    Vice President Joe Biden, left, and Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, shake hands following their the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Joe Biden, Paul Ryan

    Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin shake hands after the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • Joe Biden, Jill Biden

    Vice President Joe Biden kisses his wife, Jill Biden, following the vice presidential debate with Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Vice President Joe Biden talks to Janna Ryan, wife of Republican vice presidential nominee Rep. Paul Ryan of Wisconsin after the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Paul Ryan, Janna Ryan

    Republican vice presidential nominee, Rep. Paul Ryan, of Wisconsin, kisses his wife Janna following the vice presidential debate with Vice President Joe Biden at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Republican vice presidential nominee Rep. Paul Ryan's wife Janna, left, shakes hands with Jill Biden, wife of Vice President Joe Biden, following the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Joe Biden

    Vice President Joe Biden listens to Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Eric Gay)

  • Paul Ryan

    Republican vice presidential nominee Rep. Paul Ryan of Wisconsin answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • Paul Ryan, Joe Biden

    Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, right, listens to Vice President Joe Biden during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Eric Gay)

  • Paul Ryan

    Republican vice presidential nominee Rep. Paul Ryan of Wisconsin answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Rick Wilking)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Rick Wilking)

  • Paul Ryan, Joe Biden

    Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, right, and Vice President Joe Biden discuss a point during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Rick Wilking)

  • Paul Ryan, Joe Biden, Martha Raddatz

    Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, right, and Vice President Joe Biden, center, listen to moderator Martha Raddatz during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • US-VOTE-2012-DEBATE

    A combination picture of the vice presidential debate between US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) at the Norton Center at Centre College in Danville, Kentucky, October 11, 2012, moderated by Martha Raddatz of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Vice President Joe Biden answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Paul Ryan

    Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, makes a point to Vice President Joe Biden during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Eric Gay)

  • Joe Biden, Paul Ryan

    Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin answer a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden participates in the vice presidential debate with Republican vice presidential candidate Paul Ryan (out of frame) at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • Paul Ryan

    Republican vice presidential nominee, Rep. Paul Ryan, of Wisconsin, speaks during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Vice President Joe Biden speaks during the vice presidential debate with Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/David Goldman)

  • Jill Biden, Beau Biden, Hunter Biden

    Jill Biden, center, wife of Vice President Joe Biden, sits with her sons Beau Biden, left, and Hunter Biden, right, before the start of the vice presidential debate, at Centre College in Danville, Ky., Thursday, Oct. 11, 2012. (AP Photo/Pablo Martinez Monsivais)

  • Paul Ryan

    Republican vice presidential nominee Rep. Paul Ryan of Wisconsin answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden (L) and Republican vice presidential candidate Paul Ryan (R) participate in the vice presidential debate at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (C) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • Vice President Joe Biden answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Rick Wilking)

  • Republican vice presidential nominee Rep. Paul Ryan of Wisconsin answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)

  • Joe Biden

    Vice President Joe Biden reacts to a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • Joe Biden, Paul Ryan

    Vice President Joe Biden, left, and Republican vice presidential nominee, Rep. Paul Ryan, of Wisconsin, challenge each other during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Eric Gay)

  • Republican vice presidential nominee Rep. Paul Ryan of Wisconsin watches as Vice President Joe Biden answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Rick Wilking)

  • Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan of Wisconsin participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Rick Wilking)

  • Joe Biden

    Vice President Joe Biden answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

  • Joe Biden, Paul Ryan

    Vice President Joe Biden, left, and Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, respond to moderator Martha Raddatz during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Eric Gay)

  • Janna Ryan, Ted Olson, Lady Booth Olson, Betty Douglas

    Janna Ryan, second from right, wife of Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., his mother Betty Douglas, Ted Olson, second from left, former solicitor-general of the U.S. and his wife Lady Booth Olson sit in the audience before he start of the vice presidential debate, Thursday, Oct. 11, 2012, at Centre College in Danville, Ky. (AP Photo/Mary Altaffer)

  • US-VOTE-2012-DEBATE

    US Vice President Joe Biden participates in the vice presidential debate with Republican vice presidential candidate Paul Ryan (out of frame) at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    Republican vice presidential candidate Paul Ryan (R) participates in the vice presidential debate with US Vice President Joe Biden (out of frame) at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (L) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    Republican vice presidential candidate Paul Ryan (R) participates in the vice presidential debate with US Vice President Joe Biden (out of frame) at the Norton Center at Centre College in Danville, Kentucky, October 10, 2012, moderated by Martha Raddatz (L) of ABC News. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • Vice President Joe Biden answers a question during the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Pool-Michael Reynolds)