What s missing from national rdd surveys the impact of the growing cell only population
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What’s Missing from National RDD Surveys? The Impact of the Growing Cell-Only Population. Scott Keeter, Pew Research Center Courtney Kennedy, University of Michigan April Clark, Northern Illinois University Trevor Tompson, The Associated Press Mike Mokrzycki, The Associated Press.

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What s missing from national rdd surveys the impact of the growing cell only population
What’s Missing from National RDD Surveys?The Impact of the Growing Cell-Only Population

Scott Keeter, Pew Research Center

Courtney Kennedy, University of Michigan

April Clark, Northern Illinois University

Trevor Tompson, The Associated Press

Mike Mokrzycki, The Associated Press


Percent ages 18 29
Percent Ages 18-29

Parameter

Source: Pew Research Center surveys


Percent ages 18 291
Percent Ages 18-29

Parameter

Unweighted

survey statistic

Source: Pew Research Center surveys


What we did
What We Did

  • 4 dual-frame surveys in 2006, 4 in 2007, 5 in 2008

  • Multiple surveys on politics and the campaign

  • Others on gadgets, the internet, media consumption, the economy, gender relations


Respondent characteristics landline sample versus cell only adults

Respondent CharacteristicsLandline sample versus Cell-only adults


Characteristics of landline sample and cell only respondents
Characteristics of Landline Sample and Cell-only Respondents*

*Figures based on unweighted data


Characteristics of landline sample and cell only respondents1
Characteristics of Landline Sample and Cell-only Respondents*

*Figures based on unweighted data


Characteristics of landline sample and cell only respondents2
Characteristics of Landline Sample and Cell-only Respondents*

*Figures based on unweighted data



Impact on estimates from including cell phones
Impact on Estimates Respondents*from Including Cell Phones


Impact on estimates from including cell phones1
Impact on Estimates Respondents*from Including Cell Phones


Impact on estimates from including cell phones2
Impact on Estimates Respondents*from Including Cell Phones


Impact on estimates from including cell phones3
Impact on Estimates Respondents*from Including Cell Phones

Based on Republican

& Rep-leaning RVs

(December 2007)


Impact on estimates from including cell phones4
Impact on Estimates Respondents*from Including Cell Phones

Based on Democrat

& Dem-leaning RVs

(December 2007)


Impact of including cell phones on august 2008 horse race
Impact of Including Cell Phones Respondents*on August 2008 Horse Race





Under age 30 landline sample and cell only respondents
Under Age 30: Landline Sample and Respondents*Cell-only Respondents*

*Figures based on unweighted data


Under age 30 landline sample and cell only respondents1
Under Age 30: Landline Sample and Respondents*Cell-only Respondents*

*Figures based on unweighted data


Under age 30 impact on estimates from including cell phones
Under Age 30: Impact on Estimates Respondents*from Including Cell Phones


Under age 30 impact on estimates from including cell phones1
Under Age 30: Impact on Estimates Respondents*from Including Cell Phones


Ages 18 25 impact on estimates from including cell phones
Ages 18-25: Impact on Estimates Respondents*from Including Cell Phones



Quality of responses landline versus cell phone interviews

Quality of Responses Respondents*landline versus cell phone interviews


Quality of responses
Quality of Responses Respondents*

  • Are cell phone respondents moredistracted?

Source: October survey


Quality of responses1
Quality of Responses Respondents*

  • Are cell phone respondents lesscooperative?

Source: October survey


Interviewing rates
Interviewing Rates Respondents*

Source: June 2008 survey (results for other surveys were highly similar)


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