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The Korean General Social Survey (KGSS) is the Korean version of the General Social Survey (GSS), closely replicating the original GSS of the National Opinion Research Center at the University of Chicago.

The KGSS comprises five parts:

• The first part includes core questions covering key aspects of Korean society.
• The second part is the International Social Survey Program (ISSP) module, a cross-national survey conducted in 45 countries.
• The third part is the East Asian Social Survey (EASS) module, a joint GSS-type survey of Korea, Japan, China, and Taiwan.
• The fourth part is the European Social Survey (ESS) module, a cross-national survey conducted across Europe.
• The last part contains modules proposed by researchers.

This data collection is the cumulative version of the previous 22 years of survey data from 2003 to 2025. The survey was conducted annually from 2003 to 2014 and biennially from 2016 onward (excluding 2015, 2017, 2020, and 2022). Due to COVID-19, the 2020 survey was skipped and conducted in 2021 instead.

Respondents were asked for their opinions about Korean society, economic conditions, government performance, politics and political conditions. Additional questions include the healthcare system, health behaviors, human rights, attitudes toward aging and the elderly, household composition, income, education, occupation, environmental issues, international migration and so on. Demographic data collected includes age, sex, education level, household income, employment status, religious preference, political party affiliation, and political philosophy.

Downloads of Add Health require submission of the following information, which is shared with the original producer of Add Health: supervisor name, supervisor email, and reason for download. A Data Guide for this study is available as a web page and for download.

The National Longitudinal Study of Adolescent to Adult Health (Add Health), 1994-2018 [Public Use] is a longitudinal study of a nationally representative sample of U.S. adolescents in grades 7 through 12 during the 1994-1995 school year. The Add Health cohort was followed into young adulthood with four in-home interviews, the most recent conducted in 2008 when the sample was aged 24-32. Add Health combines longitudinal survey data on respondents' social, economic, psychological, and physical well-being with contextual data on the family, neighborhood, community, school, friendships, peer groups, and romantic relationships.

Add Health Wave I data collection took place between September 1994 and December 1995, and included both an in-school questionnaire and in-home interview. The in-school questionnaire was administered to more than 90,000 students in grades 7 through 12, and gathered information on social and demographic characteristics of adolescent respondents, education and occupation of parents, household structure, expectations for the future, self-esteem, health status, risk behaviors, friendships, and school-year extracurricular activities. All students listed on a sample school's roster were eligible for selection into the core in-home interview sample. In-home interviews included topics such as health status, health-facility utilization, nutrition, peer networks, decision-making processes, family composition and dynamics, educational aspirations and expectations, employment experience, romantic and sexual partnerships, substance use, and criminal activities. A parent, preferably the resident mother, of each adolescent respondent interviewed in Wave I was also asked to complete an interviewer-assisted questionnaire covering topics such as inheritable health conditions, marriages and marriage-like relationships, neighborhood characteristics, involvement in volunteer, civic, and school activities, health-affecting behaviors, education and employment, household income and economic assistance, parent-adolescent communication and interaction, parent's familiarity with the adolescent's friends and friends' parents.

Add Health data collection recommenced for Wave II from April to August 1996, and included almost 15,000 follow-up in-home interviews with adolescents from Wave I. Interview questions were generally similar to Wave I, but also included questions about sun exposure and more detailed nutrition questions. Respondents were asked to report their height and weight during the course of the interview, and were also weighed and measured by the interviewer.

From August 2001 to April 2002, Wave III data were collected through in-home interviews with 15,170 Wave I respondents (now 18 to 26 years old), as well as interviews with their partners. Respondents were administered survey questions designed to obtain information about family, relationships, sexual experiences, childbearing, and educational histories, labor force involvement, civic participation, religion and spirituality, mental health, health insurance, illness, delinquency and violence, gambling, substance abuse, and involvement with the criminal justice system. High School Transcript Release Forms were also collected at Wave III, and these data comprise the Education Data component of the Add Health study.

Wave IV in-home interviews were conducted in 2008 and 2009 when the original Wave I respondents were 24 to 32 years old. Longitudinal survey data were collected on the social, economic, psychological, and health circumstances of respondents, as well as longitudinal geographic data. Survey questions were expanded on educational transitions, economic status and financial resources and strains, sleep patterns and sleep quality, eating habits and nutrition, illnesses and medications, physical activities, emotional content and quality of current or most recent romantic/cohabiting/marriage relationships, and maltreatment during childhood by caregivers. Dates and circumstances of key life events occurring in young adulthood were also recorded, including a complete marriage and cohabitation history, full pregnancy and fertility histories from both men and women, an educational history of dates of degrees and school attendance, contact with the criminal justice system, military service, and various employment events, including the date of first and current jobs, with respective information on occupation, industry, wages, hours, and benefits. Finally, physical measurements and biospecimens were also collected at Wave IV, and included anthropometric measures of weight, height and waist circumference, cardiovascular measures such as systolic blood pressure, diastolic blood pressure, and pulse, metabolic measures from dried blood spots assayed for lipids, glucose, and glycosylated hemoglobin (HbA1c), measures of inflammation and immune function, including High sensitivity C-reactive protein (hsCRP) and Epstein-Barr virus (EBV).

Wave V data collection took place from 2016 to 2018, when the original Wave I respondents were 33 to 43 years old. For the first time, a mixed mode survey design was used. In addition, several experiments were embedded in early phases of the data collection to test response to various treatments. A similar range of data was collected on social, environmental, economic, behavioral, and health circumstances of respondents, with the addition of retrospective child health and socio-economic status questions. Physical measurements and biospecimens were again collected at Wave V, and included most of the same measures as at Wave IV.

The overall goal of Wave VI was to better understand life course trajectories, determinants, and consequences of critical dimensions of aging, health, and health disparities among U.S. early midlife adults. Data collection took place from 2022 to 2025, with participants between the ages of 39 and 51, with an average age of 44. Beyond longitudinal survey measures, newly added questions included those on cumulative stress, discrimination, despair, work-life balance, memory, physical limitations, and caregiving. Continuing from previous waves, home exams collected physical measurements and biospecimens with most of the same measures as Wave V.

The National Congregations Study (NCS) is a national survey effort to gather information about America's congregations. The first wave of the NCS took place in 1998, and the study was repeated in 2006-07, 2012, and 2018-19. The NCS tracks continuity and change among American congregations, and each NCS wave also explores new subjects.

With information from 5,333 congregations collected over a span of more than 20 years, the NCS helps us better understand many aspects of congregational life in the United States, and how congregations are changing in the 21st century. The NCS contributes to knowledge about American religion by collecting information about a wide range of congregations' characteristics and activities at different points in time.

In all four waves, the NCS was conducted in conjunction with the General Social Survey (GSS). The 1998, 2006, 2012, and 2018 waves of the GSS asked respondents who attend religious services to name their congregation, thus generating a nationally representative sample of religious congregations. Researchers then located these congregations. In 2006, the sample included re-interviews of a subset of congregations that participated in 1998, and in 2018-19, the sample included re-interviews of a subset of congregations that participated in 2012.

A key informant at each congregation - a minister, priest, rabbi, or other staff person or leader - provided each congregation's information via a one-hour interview conducted either over the phone or in-person. The survey gathered information on many topics, including the congregation's leadership, social composition, structure, activities, and programming. The NCS gathers information about worship, programs, staffing, community activities, demographics, funding, and many other characteristics of American congregations. Respondents of the NCS survey were asked to describe the worship service and programs sponsored by the congregation other than the main worship services, including religious education classes, musical groups, and recreational programs. Informants described the type of building in which the congregation met, whether it belonged to the congregation, and whether visitors came just to view the building's architecture or artwork. Congregations were geocoded, and selected census variables are included in this study.

In 1995-1996, the MacArthur Midlife Research Network carried out a national survey of over 7,000 Americans aged 25 to 74 [ICPSR 2760]. The purpose of the study was to investigate the role of behavioral, psychological, and social factors in understanding age-related differences in physical and mental health. The study was innovative for its broad scientific scope, its diverse samples (which included siblings of the main sample respondents and a national sample of twin pairs), and its creative use of in-depth assessments in key areas (e.g. daily diary of stressful experiences [ICPSR 3725] and cognitive functioning [ICPSR 3596]) on a subset of participants. A detailed description of the study and findings generated by it are available at: http://www.midus.wisc.edu

With support from the National Institute on Aging, a follow-up of the original Midlife Development in the United States (MIDUS) sample was conducted in 2004 (MIDUS 2 [ICPSR 4652]). The daily stress and cognitive functioning projects were repeated and expanded at MIDUS 2; in addition the protocol was expanded to include biomarkers and neuroscience.

In 2013 a third wave (MIDUS 3) of survey data was collected on longitudinal participants. Data collection for this follow-up wave largely repeated baseline assessments (e.g., phone interview and extensive self-administered questionnaire), with additional questions in selected areas such as economic recession experiences. Cognitive functioning data were also collected at the same time, while data collection for the daily diary, biomarker, and neuroscience projects commenced in 2017.

MIDUS also maintains a Colectica portal, which allows users to interact with variables across waves and create customized subsets. Registration is required.

This study of 656 respondents in the Detroit metropolitan area provides information on their religious attitudes and activities, as well as their economic and political attitudes and behavior. Respondents were asked about their belief in God and in life after death, the effects of their religious beliefs on their political beliefs, and the kinds of issues religious leaders should take a public stand on. Several questions probed respondents' views of other religious groups, as well as their attitudes on such issues as gambling, birth control, and the use of alcohol. Other topics covered include: information about respondents' economic behaviors such as saving and purchases on installment plans, respondents' opinions of government take-over of large industries and greater involvement in education and housing, respondents' attitudes toward income-earning work, science, degree of free speech, and racial equity, inter-group images, family and child-rearing patterns, welfare legislation, civil liberties, international relations, legislation on moral issues, doctrinal orthodoxy, devotionalism, and the effects of religion on politics as well as on daily life. Demographic variables specify age, sex, race, education, place of birth, marital status, number of children, length of time at present residence, religion, political party affiliation, income, occupation, original nationality of husband's and wife's family, home ownership, social class identification, and length of residence in the Detroit area.

This study of 767 adults in the Detroit metropolitan area provides information on their religious beliefs and practices, as well as their feelings about various forms of taxation such as sales tax, income tax, and property tax. The collection was a combination of two separate studies: THE VITALITY OF SUPERNATURAL EXPERIENCE by Guy Swanson, and A FISCAL RESEARCH PROGRAM by Harvey Brazer. Respondents were asked about their beliefs in the existence and characteristics of God, the amount of influence they felt that God had in their life, and how they thought God would feel about various situations. Also explored was the membership and level of activity in formal organizations for both the respondent and the respondent's spouse. The respondent was also asked to evaluate the performance of several institutions and professional groups such as colleges, their position on televisions in classrooms, the Federal Courts, doctors, and scientists. In addition, the respondent was asked to list the problems in the United States that were badly in need of resolution and to evaluate who was to blame for the problems and what could be done to solve them. Other items probed the respondent's opinions of educational television stations, the comparative quality of utility companies' services, government spending, and the most important things in life. Attitudes toward the use of taxes or use fees to pay for parks and garbage collection were also elicited. Demographic variables specify age, sex, race, education, place of birth, marital status, occupation, length of residence in the Detroit area, home ownership, length of time at present residence, number of children, original nationality of husband's and wife's family, political affiliation, and amount and sources of income.

The purpose of the Early Years of Marriage (EYM) Project was to determine ways in which the early development of marriage for Black couples and White couples affect the mental and physical health of spouses, marital stability, long-term marital outcomes, patterns of family life and, for those who divorce, individual adjustment to family disruption. The EYM Project began in 1986 with 373 newlywed couples--174 White couples and 199 Black couples. The marriages were all intra-racial and it was the first marriage for both spouses.

Year 1 interviews, which queried the couples on various aspects of married life, began after four to nine months into the marriage. Very few respondents who originally participated in Year 1 of the study refused to participate in subsequent phases of the study. In 1986 (Year 1) and 1988 (Year 3) spouses were interviewed in their homes separately and together, with the interviews conducted by interviewers of the same race. In 1987 (Year 2) and 1989 (Year 4) shorter individual telephone interviews were conducted.

In all four years, respondents were queried on a wide variety of topics such as feelings and perceptions of their own family, spouse, in-laws, and their spouse's friends, family planning, how many children they should have, how the children should be reared, childcare, and household roles and responsibilities. A series of questions was asked about reasons for getting married, how satisfying married life was, what, if any, were the special pleasures and good feelings that came from being married, how often arguments and disagreements occurred, main reasons for arguments, and how they were eventually resolved. A series of questions were also asked regarding the mental and physical health of the spouse, job satisfaction, job security, and how the job affected the family. In Year 2 and Year 4 interviews (Parts 2-4), a series of questions regarding separation and divorce were also asked.

Demographic variables include race, gender, age, level of education, occupation, income, and religious preference.