PsycTESTS is a research database that provides access to psychological tests, measures, scales, surveys, and other assessments as well as descriptive information about the test and its development and administration.

A comprehensive source for US nationwide public opinion data from academic, commercial and media survey organizations such as ABC News, CBS News, Fox News, The Gallup Organization, Los Angeles Times, National Opinion Research Center, NBC News, New York Times, Princeton Survey Research Associates, the Program on International Policy Attitudes at the University of Maryland, USA Today and The Washington Post. iPOLL is organized at the question-level, providing the tools to sift through 350,000 questions asked on national public opinion surveys since 1935. Penn State users may need to register using their PSU email to create a user account and password to download data. To create an account select the login tab. When you log in make sure you select Pennsylvania State University as your affiliation.

The Odum Institute maintains one of the oldest archives of polling data in the United States and is the exclusive repository for Louis Harris public opinion data. The Odum Institute Dataverse Network provides access to all of the data collections curated by the Odum Institute and from other scholars. The site allows access to downloadable data and allows researchers to do online analysis as well as sub-setting of large data sets.

The Roper Center for Public Opinion Research is one of the world's leading archives of social science data, specializing in data from surveys of public opinion back to the 1930s. The archive provides access to their resources through two principle resources: iPOLL allows you to search a database of more then 400,000 questions from surveys. Response frequencies are provided for each question and for some questions simple cross-tabulations are available [these are designated with a Roper Explorer Icon]. Roper Express provides searching capability and access to the code books and raw data files of Over 10,000 US and 8,000 International polls. Note: there are many questions in iPOLL that do not have corresponding data files in Roper Express. Penn State users may need to register using their PSU email to create a user account and password to download data. To create an account select the login tab. When you log in make sure you select Pennsylvania State University as your affiliation.