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American Trends Panel Wave 84




The American Trends Panel (ATP), created by Pew Research Center, is a nationally representative panel of randomly selected U.S. adults. Panelists participate via self-administered web surveys. Panelists who do not have internet access at home are provided with a tablet and wireless internet connection. Interviews are conducted in both English and Spanish. The panel is being managed by Ipsos.

Data in this report are drawn from the panel wave conducted March 1 to March 7, 2021. A total of 12,055 panelists responded out of 13,545 who were sampled, for a response rate of 89 percent. The cumulative response rate accounting for nonresponse to the recruitment surveys and attrition is four percent. The break-off rate among panelists who logged on to the survey and completed at least one item is one percent. The margin of sampling error for the full sample of 12,055 respondents is plus or minus one-and-a-half percentage points. The ATP Wave 84 asked questions about religion in politics and tolerance.

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

Data File

Cases: 12055
Variables: 160
Weight Variable: WEIGHT_W84, WEIGHT_W70_W84, WEIGHT_W80_W84

The ATP data is weighted in a multi-step process that accounts for multiple stages of sampling and nonresponse that occur at different points in the survey process. First, each panelist begins with a base weight that reflects their probability of selection for their initial recruitment survey (and the probability of being invited to participate in the panel in cases where only a subsample of respondents were invited). The base weights for panelists recruited in different years are scaled to be proportionate to the effective sample size for all active panelists in their cohort. To correct for nonresponse to the initial recruitment surveys and gradual panel attrition, the base weights for all active panelists are calibrated to align with the population benchmarks identified in the accompanying table to create a full-panel weight.

For ATP waves in which only a subsample of panelists are invited to participate, a wave-specific base weight is created by adjusting the full-panel weights for subsampled panelists to account for any differential probabilities of selection for the particular panel wave. For waves in which all active panelists are invited to participate, the wave-specific base weight is identical to the full-panel weight.

In the final weighting step, the wave-specific base weights for panelists who completed the survey are again calibrated to match population benchmarks. The Center calibrates ATP surveys to both demographic benchmarks (e.g., age, education, sex, race, ethnicity, geography) and non-demographic benchmarks (e.g., political party affiliation, religious affiliation, registered voter status, volunteerism). These weights are then trimmed (typically at about the first and 99th percentiles) to reduce the loss in precision stemming from variance in the weights. Sampling errors and test of statistical significance take into account the effect of weighting.

WEIGHT_W84 is the weight for the sample. Data for most Pew Research Center reports are analyzed using this weight.

WEIGHT_W70_W84 is a longitudinal weight used in analysis for respondents to both W70 and W84. Publications using this weight are identified below.

WEIGHT_W80_W84 is a longitudinal weight used in analysis for respondents to both W80 and W84. Publications using this weight are identified below.

Data Collection

March 1, 2021 to March 7, 2021

Original Survey (Instrument)

American Trends Panel Wave 84

Funded By

The American Trends Panel (ATP) is supported by the Pew Research Center. For more information on the history of the ATP, click here.

Collection Procedures

The data collection field period for this survey was March 1 to March 7, 2021. Postcard notifications were mailed to all ATP panelists with a known residential address on March 1, 2021.

On March 1 and March 2, invitations were sent out in two separate launches: Soft Launch and Full Launch. Sixty panelists were included in the soft launch, which began with an initial invitation sent on March 1, 2021. The ATP panelists chosen for the initial soft launch were known responders who had completed previous ATP surveys within one day of receiving their invitation. All remaining English- and Spanish-speaking panelists were included in the full launch and were sent an invitation on March 2, 2021.

All panelists with an email address received an email invitation and up to two email reminders if they did not respond to the survey. All ATP panelists that consented to SMS messages received an SMS invitation and up to two SMS reminders.

Sampling Procedures

The ATP was created in 2014, with the first cohort of panelists invited to join the panel at the end of a large, national, landline and cellphone random-digit-dial survey that was conducted in both English and Spanish. Two additional recruitments were conducted using the same method in 2015 and 2017, respectively. Across these three surveys, a total of 19,718 adults were invited to join the ATP, of whom 9,942 (50%) agreed to participate.

In August 2018, the ATP switched from telephone to address-based recruitment. Invitations were sent to a random, address-based sample of households selected from the U.S. Postal Service's Delivery Sequence File. Two additional recruitments were conducted using the same method in 2019 and 2020, respectively. Across these three address-based recruitments, a total of 17,161 adults were invited to join the ATP, of whom 15,134 (88 percent) agreed to join the panel and completed an initial profile survey. In each household, the adult with the next birthday was asked to go online to complete a survey, at the end of which they were invited to join the panel. Of the 25,076 individuals who have ever joined the ATP, 13,545 remained active panelists and continued to receive survey invitations at the time this survey was conducted.

The U.S. Postal Service's Delivery Sequence File has been estimated to cover as much as 98 percent of the population, although some studies suggest that the coverage could be in the low 90 percent range. The American Trends Panel never uses breakout routers or chains that direct respondents to additional surveys.

Principal Investigators

Pew Research Center

Related Publications

March 09, 2021 "Broad Public Support for Coronavirus Aid Package; Just a Third Say It Spends Too Much"

March 11, 2021 "Biden Viewed Positively on Many Issues, but Public Is Less Confident He Can Unify Country

March 18, 2021 "Large Majority of the Public Views Prosecution of Capitol Rioters as 'Very Important'" [USES LONGITUDINAL WEIGHT_W80_W84 WEIGHTING VARIABLE]

March 22, 2021 "Life in U.S. Religious Congregations Slowly Edges Back Toward Normal [USES LONGITUDINAL WEIGHT_W70_W84 WEIGHTING VARIABLE]

March 30, 2021 "Most Democrats and Republicans Know Biden Is Catholic, but They Differ Sharply About How Religious He Is"

Coding Notes

Variables BIDENRELIG_W84 and HARRISRELIG_W84 have been backcoded based on open-end responses to the Other (specify) that contained an answer to one of the provided responses.

For a small number of respondents with high risk of identification, certain values have been randomly swapped with those of lower risk cases with similar characteristics.

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