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American Trends Panel Wave 20




Schalk, M., Ackermann, A., Nishimura, R., Williams, D., & Turakhia, C. (2021, December 13). American Trends Panel Wave 20.


The American Trends Panel (ATP) is a national, probability-based online panel of adults in the United States living in households. Adults who use the internet participate in the panel via self-administered web surveys, and adults who do not use the internet participate via mail. The 20th wave of the panel survey was fielded for the Pew Research Center by Abt SRBI from Aug.16 to Sept.12, 2016. In total, 4,538 ATP members completed the survey, with 4,195 participating by web and 343 participating by mail. The survey was administered in English and Spanish. Survey weights are provided to account for differential probabilities of selection into the panel as well as differential nonresponse to the panel recruitment survey, the panel invitation, and the panel survey itself (Wave 20). The margin of sampling error for full sample weighted estimates is +\- 2.39 percentage points. The ATP Wave 20 asked questions about religious freedom, evangelical identification, police, and politics post convention.

The ARDA has added five additional variables to the original data set to enhance the users' experience on our site.

Data File

Cases: 4538
Variables: 172
Weight Variable: WEIGHT_W20

WEIGHT_W20 is the weight for the combined sample of all web and mail interviews. Data for all Pew Research Center reports are analyzed using this weight.

Data Collection

Aug. 16 - Sept. 12, 2016

Original Survey (Instrument)

American Trends Panel Wave 20

Funded By

Support for this project was provided by the Pew Charitable Trusts.

Collection Procedures

Currently all ATP panelists have been recruited from two large (n=10,013 and n=6,004) national overlapping dual frame landline and cell phone random digit dial (RDD) surveys conducted for the Pew Research Center. At the end of each RDD survey, respondents were invited to join the panel. The first RDD survey was conducted from Jan. 23 to March 16, 2014, and the second RDD survey was conducted from Aug. 27 to Oct. 4, 2015, both in English and Spanish.

ATP panelists who reported using the internet and for whom we had an email address were invited to participate in Wave 20 via a self-administered web survey. The data collection for the web survey was conducted from Aug. 22 to Sept. 12, 2016. Advance postcards were mailed to all web mode panelists with a known residential address. One hundred panelists were included in a soft launch of the web survey which began with an initial email invitation sent on Aug. 22, 2016. The web panelists chosen for the soft launch were known responders to previous ATP surveys who had completed their surveys within two days of receiving their invitation. The remaining panelists assigned to the web mode were included in the full launch and were sent an initial email invitation on Aug. 23. All web mode panelists who previously provided consent to receive text messages received a text message invitation in addition to their email invitation. Panelists who were known to have short codes blocked from previous survey wave SMS invitations were not included in this group. A total of 1,814 SMS invitations were sent. Up to four reminder emails and SMS messages were sent to those who did not respond to the web survey.

ATP web panelists who completed their survey in Spanish were offered a $20 post-paid incentive for completing the Wave 20 web survey. Panelists who were age 18 to 25, African American, with high school education or less, were not registered to vote or reported being Hispanic but taking the survey in English in the RDD recruitment survey were offered a $10 post-paid incentive for completing the Wave 20 web survey. All other panelists who completed the web survey were offered a $5 post-paid incentive. Web respondents could choose to receive the post-paid incentive in form of a check or a gift code to The differential incentive amounts were designed to increase panel survey participation among groups that traditionally have low survey response propensities.

At the start of the Wave 20 Survey, 454 ATP members belonged to the non-Internet arm of the panel. The first packet of English language surveys was mailed using first class mail and Spanish language surveys were mailed using Priority Mail. ATP mail panelists were offered a cash pre-incentive that was included in their first survey packet. The same differential amounts that web panelists received were also used for mail panelists. A reminder postcard was sent to all mail mode respondents. The second survey packet was mailed to 258 mail mode respondents who did not have a survey returned by Aug. 19, 2016. The cutoff date to process returned mail surveys was Sept. 6, 2016 which allowed a week for final data entry and quality checking.

Sampling Procedures

The target population for Wave 20 was non-institutionalized persons age 18 and over, living in the US, including Alaska and Hawaii. The sample consisted of 5,604 members of the ATP, which is a probability-based online panel of adults in the United States. The ATP originally consisted of 8,314 members, however, 438 members requested to be removed from the panel prior to the start of Wave 20. An additional 2,272 panelists were removed prior to the start of Wave 20 because they had not responded to any of the panel surveys since their recruitment or have since been unable to be reached by email, phone or mail. The Wave 20 Survey featured a simultaneous mixed-mode design. Panelists who use the internet and provided an email address participated via self-administered web survey, and adults who do not use the internet (or do but did not provide an email address) participated via a mail survey. Abt SRBI conducted the survey but is not reporting on results based on part of the sample.

Principal Investigators

Abt SRBI, Marci Schalk, Allison Ackermann, Raphael Nishimura, Dean Williams, and Chintan Turakhia

Related Publications

"Where the Public Stands on Religious Liberty vs. Nondiscrimination", published Sept. 28, 2016 by the Pew Research Center.

"The American Trends Panel." Pew Research Center.

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