{"id":288404,"date":"2026-02-19T13:55:32","date_gmt":"2026-02-19T18:55:33","guid":{"rendered":"https:\/\/alpha.pewresearch.org\/pewresearch-org\/?p=288404"},"modified":"2026-02-19T13:55:51","modified_gmt":"2026-02-19T18:55:51","slug":"methodology-newsletters","status":"publish","type":"post","link":"https:\/\/alpha.pewresearch.org\/pewresearch-org\/journalism\/2026\/02\/19\/methodology-newsletters\/","title":{"rendered":"Methodology"},"content":{"rendered":"\n

Overview<\/h4>\n\n\n\n

Data in this report comes from Wave 177 of the American Trends Panel (ATP), Pew Research Center\u2019s nationally representative panel of randomly selected U.S. adults. The survey was conducted from Aug. 18 to 24, 2025. A total of 5,153 panelists responded out of 5,525 who were sampled, for a survey-level response rate of 93%.<\/p>\n\n\n\n

The cumulative response rate accounting for nonresponse to the recruitment surveys and attrition is 3%. The break-off rate among panelists who logged on to the survey and completed at least one item is 1%. The margin of sampling error for the full sample of 5,153 respondents is plus or minus 1.6 percentage points.<\/p>\n\n\n\n

The survey includes an oversample<\/a> of non-Hispanic Asian adults in order to provide more precise estimates of the opinions and experiences of this smaller demographic subgroup. These oversampled groups are weighted back to reflect their correct proportions in the population.<\/p>\n\n\n\n

SSRS conducted the survey for the Center via online (n=4,994) and live telephone (n=159) interviewing. Interviews were conducted in both English and Spanish.<\/p>\n\n\n\n

To learn more about the ATP, read \u201cAbout the American Trends Panel<\/a>.\u201d<\/p>\n\n\n\n

Panel recruitment<\/h4>\n\n\n\n

Since 2018, the ATP has used address-based sampling (ABS) for recruitment. A study cover letter and a pre-incentive are mailed to a stratified, random sample of households selected from the U.S. Postal Service\u2019s Computerized Delivery Sequence File. This Postal Service file has been estimated to cover 90% to 98% of the population.[1. AAPOR Task Force on Address-based Sampling. 2016. \u201cAAPOR Report: Address-based Sampling<\/a>.\u201d] Within each sampled household, the adult with the next birthday is selected to participate. Other details of the ABS recruitment protocol have changed over time but are available upon request.[2. Email pewsurveys@pewresearch.org<\/a>.] Prior to 2018, the ATP was recruited using landline and cellphone random-digit-dial surveys administered in English and Spanish.<\/p>\n\n\n\n

A national sample of U.S. adults has been recruited to the ATP approximately once per year since 2014. In some years, the recruitment has included additional efforts (known as an \u201coversample\u201d) to improve the accuracy of data for underrepresented groups. For example, Hispanic adults, Black adults and Asian adults were oversampled in 2019, 2022 and 2023, respectively.<\/p>\n\n\n\n

Sample design<\/h4>\n\n\n\n

The overall target population for this survey was noninstitutionalized persons ages 18 and older living in the United States. It featured a stratified random sample from the ATP in which non-Hispanic Asian adults were selected with certainty. The remaining panelists were sampled at rates designed to ensure that the share of respondents in each stratum is proportional to its share of the U.S. adult population to the greatest extent possible. Respondent weights are adjusted to account for differential probabilities of selection as described in the Weighting section below.<\/p>\n\n\n\n

Questionnaire development and testing<\/h4>\n\n\n\n

The questionnaire was developed by Pew Research Center in consultation with SSRS. The web program used for online respondents was rigorously tested on both PC and mobile devices by the SSRS project team and Center researchers. The SSRS project team also populated test data that was analyzed in SPSS to ensure the logic and randomizations were working as intended before launching the survey.<\/p>\n\n\n\n

Incentives<\/h4>\n\n\n\n

All respondents were offered a post-paid incentive for their participation. Respondents could choose to receive the post-paid incentive in the form of a check or gift code to Amazon.com, Target.com or Walmart.com. Incentive amounts ranged from $5 to $20 depending on whether the respondent belongs to a part of the population that is harder or easier to reach. Differential incentive amounts were designed to increase panel survey participation among groups that traditionally have low survey response propensities.<\/p>\n\n\n\n

Data collection protocol<\/h4>\n\n\n\n

The data collection field period for this survey was Aug. 18 to 24, 2025. Surveys were conducted via self-administered web survey or by live telephone interviewing. <\/p>\n\n\n\n

For panelists who take surveys online:<\/strong> Postcard notifications were mailed to a subset on Aug. 18.[3. The ATP does not use routers or chains in any part of its online data collection protocol, nor are they used to direct respondents to additional surveys. Postcard notifications for web panelists are sent to 1) panelists who were recruited within the last two years and 2) panelists recruited prior to the last two years who opt to continue receiving postcard notifications.] Survey 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 Aug. 18. All remaining English- and Spanish-speaking sampled online panelists were included in the full launch and were sent an invitation on Aug. 19.<\/p>\n\n\n\n

\"A<\/a><\/figure>\n\n\n\n

Panelists participating online were sent an email invitation and up to two email reminders if they did not respond to the survey. ATP panelists who consented to SMS messages were sent an SMS invitation with a link to the survey and up to two SMS reminders.<\/p>\n\n\n\n

For panelists who take surveys over the phone with a live interviewer:<\/strong> Prenotification postcards were mailed on Aug. 15. Soft launch took place on Aug. 18 and involved dialing until a total of five interviews had been completed. All remaining English- and Spanish-speaking sampled phone panelists\u2019 numbers were dialed throughout the remaining field period. Panelists who take surveys via phone can receive up to six calls from trained SSRS interviewers.<\/p>\n\n\n\n

Data quality checks<\/h4>\n\n\n\n

To ensure high-quality data, the Center’s researchers performed data quality checks to identify any respondents showing patterns of satisficing. This includes checking whether respondents left questions blank at very high rates or always selected the first or last answer presented. As a result of this checking, one ATP respondent was removed from the survey dataset prior to weighting and analysis.<\/p>\n\n\n\n

Weighting<\/h4>\n\n\n\n

The ATP data is weighted in a process that accounts for multiple stages of sampling and nonresponse that occur at different points in the panel survey process. First, each panelist begins with a base weight that reflects their probability of recruitment into the panel. These weights are then calibrated to align with the population benchmarks in the accompanying table to correct for nonresponse to recruitment surveys and panel attrition. If only a subsample of panelists was invited to participate in the wave, this weight is adjusted to account for any differential probabilities of selection.<\/p>\n\n\n\n

Among the panelists who completed the survey, this weight is then calibrated again to align with the population benchmarks identified in the accompanying table and trimmed at the 1st and 99th percentiles to reduce the loss in precision stemming from variance in the weights. Sampling errors and tests of statistical significance take into account the effect of weighting.<\/p>\n\n\n\n

\"A<\/a><\/figure>\n\n\n\n

The following table shows the unweighted sample sizes and the error attributable to sampling that would be expected to be at the 95% level of confidence for different groups in the survey.<\/p>\n\n\n\n

\"A<\/a><\/figure>\n\n\n\n

Sample sizes and sampling errors for other subgroups are available upon request. In addition to sampling error, one should bear in mind that question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of opinion polls.<\/p>\n\n\n\n

Dispositions and response rates<\/h4>\n\n\n\n
\"A<\/a><\/figure>\n\n\n\n
\"A<\/a><\/figure>\n\n\n\n

How family income tiers are calculated<\/h4>\n\n\n\n

Family income data reported in this study is adjusted for household size and cost-of-living differences by geography. Panelists then are assigned to income tiers that are based on the median adjusted family income of all American Trends Panel members. The process uses the following steps:<\/p>\n\n\n\n

    \n
  1. First, panelists are assigned to the midpoint of the income range they selected in a family income question that was measured on either the most recent annual profile survey or, for newly recruited panelists, their recruitment survey. This provides an approximate income value that can be used in calculations for the adjustment.<\/li>\n\n\n\n
  2. Next, these income values are adjusted for the cost of living in the geographic area where the panelist lives. This is calculated using price indexes published by the U.S. Bureau of Economic Analysis. These indexes, known as Regional Price Parities<\/a> (RPP), compare the prices of goods and services across all U.S. metropolitan statistical areas as well as non-metro areas with the national average prices for the same goods and services. The most recent available data at the time of the annual profile survey is from 2022. Those who fall outside of metropolitan statistical areas are assigned the overall RPP for their state\u2019s non-metropolitan area.<\/li>\n\n\n\n
  3. Family incomes are further adjusted for the number of people in a household using the methodology from Pew Research Center\u2019s previous work on the American middle class<\/a>. This is done because a four-person household with an income of say, $50,000, faces a tighter budget constraint than a two-person household with the same income.<\/li>\n\n\n\n
  4. Panelists are then assigned an income tier. \u201cMiddle-income\u201d adults are in families with adjusted family incomes that are between two-thirds and double the median adjusted family income for the full ATP at the time of the most recent annual profile survey. The median adjusted family income for the panel is roughly $74,100. Using this median income, the middle-income range is about $49,400 to $148,200. Lower-income families have adjusted incomes less than $49,400 and upper-income families have adjusted incomes greater than $148,200 (all figures expressed in 2023 dollars and scaled to a household size of three). If a panelist did not provide their income and\/or their household size, they are assigned \u201cno answer\u201d in the income tier variable.<\/li>\n<\/ol>\n\n\n\n

    Two examples of how a given area\u2019s cost-of-living adjustment was calculated are as follows: the Pine Bluff metropolitan area in Arkansas is a relatively inexpensive area, with a price level that is 19.1% less than the national average. The San Francisco-Oakland-Berkeley metropolitan area in California is one of the most expensive areas, with a price level that is 17.9% higher than the national average. Income in the sample is adjusted to make up for this difference. As a result, a family with an income of $40,400 in the Pine Bluff area is as well off financially as a family of the same size with an income of $58,900 in San Francisco. <\/p>\n","protected":false},"excerpt":{"rendered":"

    The American Trends Panel survey methodology Overview Data in this report comes from Wave 177 of the American Trends Panel (ATP), Pew Research Center\u2019s nationally representative panel of randomly selected U.S. adults. The survey was conducted from Aug. 18 to 24, 2025. A total of 5,153 panelists responded out of 5,525 who were sampled, for 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