Methodologies of the Surveys Reported on this Site

Research by the Political Psychology Research Group at Stanford University

Introduction Fundamentals Who Should Take Action Government Policy Economic Side Effects Willingness to Pay Priority Consequences of Global Warming Preparing for Possible Consequences Consumer Choices Attitude Strength Voter Behavior Opinions in the States Trust in Scientists Scientists' Beliefs Partisan Views Publications

October, 1997

Lead research organization: Ohio State University
Interview dates: September 17 – October 5, 1997
Interview language: English
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 688 U.S. adults aged 18 and older
Interviews conducted by: Ohio State University Survey Research Unit
AAPOR Response Rate 3:     30%

February, 1998

Lead research organization: Ohio State University
Interview dates: December 20 – February 13, 1998
Interview language: English
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 725 U.S. adults aged 18 and older
Interviews conducted by: Ohio State University Survey Research Unit
AAPOR Response Rate 3:     38%

March, 2006

Lead research organizations: Stanford University, ABC News, Time Magazine Survey
Interview dates: March 9 – March 14, 2006
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 1,002 U.S. adults aged 18 and older
Interviews conducted by: TNS of Horsham, PA
AAPOR Response Rate 3:     38%

April, 2007

Lead research organizations: Stanford University, ABC News, Washington Post
Interview dates: April 5 – April 10, 2007
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 1,002 U.S. adults aged 18 and older
Interviews conducted by: TNS of Horsham, PA
AAPOR Response Rate 3:     29%.

April, 2007 

Lead research organizations: Stanford University, New Scientist
Interview dates: April 12 – April 18, 2007
Interview language:
Mode: Online research panel – KnowledgePanel
Sample: A random digit dial national probability sample of 1,491  U.S. adults aged 18 and older
Interviews conducted by: Knowledge Networks
AAPOR Response Rate 3:     26%.

June, 2007

Lead research organizations: Stanford University, Associated Press
Interview dates: June 12-14, 2007
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 1,001  U.S. adults aged 18 and older
Interviews conducted by: Ipsos-Public Affairs
AAPOR Response Rate 3:

September, 2007

Lead research organizations:Stanford University, Associated Press
Interview dates: September 21-23, 2007
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 1,001  U.S. adults aged 18 and older
Interviews conducted by: Ipsos-Public Affairs
AAPOR Response Rate 3:      3%

July, 2008

Lead research organizations: Stanford University, ABC News, Planet Green Survey.
Interview dates: July 23 – 28, 2008
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones
Sample: A random digit dial national probability sample of 1,000 U.S. adults aged 18 and older
Interviews conducted by: TNS of Horsham, PA
AAPOR Response Rate 3:     29%

November, 2009

Lead research organization: Stanford University, Associated Press
Interview dates: November 17 – 29, 2009
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (705) and on cellular telephones (300)
Sample: A random digit dial national probability sample of 1,005 U.S. adults aged 18 and older
Interviews conducted by: GfK Roper Public Affairs & Media
AAPOR Response Rate 3:     12%

June, 2010

Lead research organizations: Stanford University/ Associated Press
Interview dates: June 1 – 7, 2010
Interview language: English and Spanish
Mode:Interviews were conducted via landline telephones (699) and on cellular telephones (301)
Sample: A random digit dial national probability sample of 1,000 U.S. adults aged 18 and older
Interviews conducted by: GfK Custom Research North America.
AAPOR Response Rate 3:     9%

November, 2010

Lead research organization: Stanford University
Interview dates: November 1 – 14, 2010
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (671) and on cellular telephones (330)
Sample: A random digit dial national probability sample of 1,001 U.S. adults aged 18 and older
Interviews conducted by: Abt SRBI
AAPOR Response Rate 3:     17%

September, 2011

Lead research organization: Stanford University, Reuters
Interview dates: September 8 – 12, 2011
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (890) and on cellular telephones (244)
Sample: A random digit dial national probability sample of 1,134 U.S. adults aged 18 and older
Interviews conducted by: Ipsos Public Affairs of Washington, DC
AAPOR Response Rate 3:     8%

March, 2012

Lead research organizations: Stanford University, Reuters
Interview dates: March 8-11, 2012.
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (853) and on cellular telephones (231)
Sample: A random digit dial national probability sample of 1,084 U.S. adults aged 18 and older
Interviews conducted by: Ipsos Public Affairs of Washington, DC
AAPOR Response Rate 3:     7%

June, 2012

Lead research organizations: Stanford University, USA Today
Interview dates: June 13 – 21, 2012
Interview language: English
Mode: Interviews were conducted via landline telephones (603) and on cellular telephones (201)
Sample: A random digit dial national probability sample of 804 U.S. adults aged 18 and older
Interviews conducted by: Abt SRBI
AAPOR Response Rate 3:     15%

November, 2012

Lead research organizations: Associated Press, Stanford University
Interview dates: November 29 – December 3, 2012
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (600) and on cellular telephones (402)
Sample: A random digit dial national probability sample of 1,002 U.S. adults aged 18 and older
Interviews conducted by: GfK Roper Public Affairs & Corporate Communications
AAPOR Response Rate 3:     15%

March, 2013

Lead research organizations: Stanford University
Interview dates: March 3 – 18, 2013
Interview language: English and Spanish
Mode: Interviews were conducted via Internet
Sample: National probability sample of 1,174 U.S. adults aged 18 and older
Interviews conducted by: GfK Custom Research
AAPOR Cumulative Response Rate 2:     2%.

December, 2013

Lead research organizations: Stanford University, Resources for the Future, USA Today
Interview dates: November 20- Dec. 5, 2013
Interview language: English
Mode: Interviews were conducted via landline telephones (521) and on cellular telephones (280)
Sample: A random digit dial national probability sample of 801 U.S. adults aged 18 and older
Interviews conducted by: Abt SRBI
AAPOR Response Rate 3:     13%

June, 2014

Lead research organization: Stanford University, Resources for the Future
Interview dates: June 4 – June 8, 2014
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (512) and on cellular telephones (511)
Sample: A random digit dial national probability sample of 1,023 U.S. adults aged 18 and older
Interviews conducted by: SSRS
AAPOR Response Rate 3:     8%

January, 2015

Lead research organization: Stanford University, Resources for the Future, The New York Times
Interview dates: January 7 – 22, 2015
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (483) and on cellular telephones (523)
Sample: A random digit dial national probability sample of 1,006 U.S. adults aged 18 and older
Interviews conducted by: SSRS
AAPOR Response Rate 3:     12%

May, 2018

Lead research organization: Stanford University, ABC News, Resources for the Future
Interview dates: May 7 – June 11, 2018
Interview language: English and Spanish
Mode: Interviews were conducted via landline telephones (323) and on cellular telephones (677)
Sample: A random digit dial national probability sample of 1,000 U.S. adults aged 18 and older
Interviews conducted by: ReconMR
AAPOR Response Rate 3:     17%

August, 2020

Lead research organization: Stanford University, Resources for the Future, ReconMR
Interview dates: May 28 – August 16, 2020
Interview language: English
Mode: Interviews were conducted via landline telephones (310) and on cellular telephones (689)
Sample: A random digit dial national probability sample of 999 U.S. adults aged 18 and older
Interviews conducted by: ReconMR
AAPOR Response Rate 3:     10%