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

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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


How are estimates affected

How are estimates affected?


Impact on estimates from including cell phones

Impact on Estimates from Including Cell Phones


Impact on estimates from including cell phones1

Impact on Estimates from Including Cell Phones


Impact on estimates from including cell phones2

Impact on Estimates from Including Cell Phones


Impact on estimates from including cell phones3

Impact on Estimates from Including Cell Phones

Based on Republican

& Rep-leaning RVs

(December 2007)


Impact on estimates from including cell phones4

Impact on Estimates 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 on August 2008 Horse Race


Media consumption estimates 2008

Media Consumption Estimates, 2008


Media consumption estimates 20081

Media Consumption Estimates, 2008


Media consumption estimates 20082

Media Consumption Estimates, 2008


Under age 30 landline sample and cell only respondents

Under Age 30: Landline Sample and Cell-only Respondents*

*Figures based on unweighted data


Under age 30 landline sample and cell only respondents1

Under Age 30: Landline Sample and Cell-only Respondents*

*Figures based on unweighted data


Under age 30 impact on estimates from including cell phones

Under Age 30: Impact on Estimates from Including Cell Phones


Under age 30 impact on estimates from including cell phones1

Under Age 30: Impact on Estimates from Including Cell Phones


Ages 18 25 impact on estimates from including cell phones

Ages 18-25: Impact on Estimates from Including Cell Phones


Summary of comparisons for analysis of ages 18 25

Summary of Comparisons for Analysis of Ages 18-25


Quality of responses landline versus cell phone interviews

Quality of Responseslandline versus cell phone interviews


Quality of responses

Quality of Responses

  • Are cell phone respondents moredistracted?

Source: October survey


Quality of responses1

Quality of Responses

  • Are cell phone respondents lesscooperative?

Source: October survey


Interviewing rates

Interviewing Rates

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


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