Americans' Changing Lives: Waves I, II, III, IV, V, and VI, 1986, 1989, 1994, 2002, 2011, and 2021 (ICPSR 4690)
The Americans' Changing Lives (ACL) survey series is an ongoing, nationally representative, longitudinal study focusing especially on differences between Black and White Americans in middle and late life. These data constitute the first, second, third, fourth, fifth, and sixth waves in a panel survey covering a wide range of sociological, psychological, mental, and physical health items. Wave I of the study began in 1986 with a nation face-to-face survey of 3,617 adults ages 25 and up, with Black Americans and people aged 60 and over over-sampled at twice the rate of the others. Wave II constitutes face-to-face re-interviews in 1989 of those still alive. Survivors have been re-interviewed by telephone, and when necessary face-to-face, in 1994 (Wave III), 2001/02 (Wave IV), 2011 (Wave V), and 2019/21 (Wave VI).
Please note that for Wave VI, the majority of data collection occurred in 2019, with only a small subset (n=39) of participants surveyed in 2021.
ACL was designed and sought to investigate the following: (1) The ways in which a wide range of activities and social relationships that people engage in are broadly "productive," (2) how individuals adapt to acute life events and chronic stresses that threaten the maintenance of health, effective functioning, and productive activity, and (3) sociocultural variations in the nature, meaning, determinants, and consequences of productive activity and relationships. Among the topics covered are interpersonal relationships (spouse/partner, children, parents, friends), sources and levels of satisfaction, social interactions and leisure activities, traumatic life events (physical assault, serious illness, divorce, death of a loved one, financial or legal problems), perceptions of retirement, health behaviors (smoking, alcohol consumption, overweight, rest), and utilization of health care services (doctor visits, hospitalization, nursing home institutionalization, bed days). Also included are measures of physical health, psychological well-being, and indices referring to cognitive functioning.
Demographic information provided for individuals includes household composition, number of children and grandchildren, employment status, occupation and work history, income, family financial situation, religious beliefs and practices, ethnicity, race, education, sex, and region of residence.
Boys Town Study of Youth Development, United States, mid-1970s (ICPSR 34595)
Flint [Michigan] Adolescent Study (FAS): A Longitudinal Study of School Dropout and Substance Use, 1994-1997 (ICPSR 34598)
The Flint Adolescent Study (FAS) interviewed 850 ninth graders in the four public high schools of Flint, MI. The study was conducted in collaboration with the Projects for Urban and Regional Affairs and Flint Community Schools. The goal of the study was to explore the protective factors associated with school dropout and alcohol and substance use. The study followed the youths for four years beginning in the Fall of 1994. The sample reflected the overall student body in the Flint high schools. In order to study those students most at risk for leaving school before graduation, individuals with grade point averages of 3.0 and below were selected.
Interviews were conducted face-to-face with each student at the school or in a community location for students who were out of school. Each interview took about one hour to complete. At the end of the interview students were asked to complete the last section of the questionnaire by themselves which contains questions about their drug use and sexual behavior.
Information obtained from the youths includes: participation in church, school, and community organizations; social support and influence of family and friends; self esteem and psychological well being; delinquent and violent behaviors; alcohol and substance use; sex behavior and child bearing; school attitudes and performance; and family structure and relationships. The Youths were asked to complete a brief questionnaire at the end of the interview about their alcohol and substance use, and sexual behavior. In years 3 and 4 questions also asked about driving behavior, attachment style, stress, mentoring, and racial identity. Data was also collected about parental education and occupation.
General Social Survey, 1972-2012 [Cumulative File] (ICPSR 34802)
General Social Survey, 1972-2014 [Cumulative File] (ICPSR 36319)
General Social Survey, 1972-2016 [Cumulative File] (ICPSR 36797)
Health Consequences of Long-Term Injection Heroin Use Among Aging Mexican American Men in Houston, Texas, 2008 - 2011 [Restricted-use Files] (ICPSR 34896)
The study is comprised of interviews from 227 Hispanic males aged 45 or older living in the area of Houston, Texas to address the gaps in knowledge on the social factors and health consequences of injection heroin use among aging Mexican American males. Specifically, the study investigated how the life course transitions of incarceration and drug treatment and drug abuse and family trajectories affect both the heroin career status and health consequences of these aging Mexican American men.
The study used a cross-sectional, field-intensive outreach methodology augmented with respondent-driven sampling. Recruitment was focused in two Houston neighborhoods that are predominantly Mexican American areas with high rates of crime, poverty, and psychosocial challenges. Trained Outreach Specialists familiar with these communities identified community gatekeepers and gained their trust through continued presence in the community and ongoing dialogue about the study. These gatekeepers then helped identify individuals meeting the inclusion criteria: Mexican American men aged 45 years or older with a history of injection drug use for at least 3 years. The men were then classified into one of three groups: current injectors (current group), former injectors not in treatment (former group), or former injectors currently enrolled in methadone maintenance treatment programs (MMTP group).
The second part is a second survey asking questions about social networks the respondent participates in. Questions ask the respondent to answer on one individual in their network and answer questions about that person and their interaction with them. Questions include basic demographics, history injecting drugs and sexual contact with the person.
Institutional Pathways: Dynamics and Characteristics of System Service Use by Serious Adolescent Offenders, Arizona and Pennsylvania, 2000-2010 (ICPSR 36860)
These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigators if further information is needed.
This study is a secondary analysis (syntax only, no data) of Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Subject Measures, 2000-2010 (ICPSR 29961) and Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Calendar Data, 2000-2010 [Restricted] (ICPSR 32282).
The purpose of this study was to further existing knowledge of juvenile justice intervention and how juvenile justice intervention is related to positive outcomes during the transition to adulthood. This study examines three main aims using data from the Pathways to Desistance study, which followed a sample of serious adolescent offenders for seven years to examine the desistance process. First, trajectories of secure institutional placement for serious offenders during the study period were identified. Second, trajectories of gainful activities for serious adolescent offenders during the study period were identified. Gainful activities were defined as working or attending school. Third, factors associated with turning points in the gainful activities trajectories were explored. In the course of estimating the gainful activities trajectories, there appeared to be a key moment, around year 3, where multiple trajectories with moderate levels of engagement in gainful activities diverged. Together, these three aims will inform how juvenile justice intervention is related to positive outcomes during the transition to adulthood and identify factors that may be related to positive outcomes and critical turning points in the trajectories of serious adolescent offenders.
Group differences were examined by testing bivariate differences in a broad range of variables: demographic variables (gender, age, and race/ethnicity); study site and year of interview; characteristics of prior service receipt at baseline (location and orientation); school, family and neighborhood characteristics; characteristics of the offense and offense history; individual factors (mental health and substance use symptoms); and risk scores.
Kenya Democratization Survey Project, 2006 (ICPSR 32041)
Latino MSM Community Involvement: HIV Protective Effects (ICPSR 34385)
Los Angeles Metropolitan Area Surveys [LAMAS] 1, 1970 (ICPSR 36631)
The Los Angeles Metropolitan Area Surveys [LAMAS] 1, 1970 collection features data gathered in 1970 as part of the Los Angeles Metropolitan Area Surveys (LAMAS). The LAMAS, beginning in the spring of 1970, are a shared-time omnibus survey of Los Angeles County community members, usually repeated twice annually. The LAMAS were conducted ten times between 1970 and 1976 in an effort to develop a set of standard community profile measures appropriate for use in the planning and evaluation of public policy.
The LAMAS instruments, indexes, and scales were used to track the development and course of social indicators (including social, psychological, health, and economic variables) and the impact of public policy on the community. Questions in this survey covered respondents' attitudes toward the following topics: air pollution, health care services in the community, local government politics, police relations, recreation, and leisure time. In addition, participating researchers were given the option of submitting questions to be asked in addition to the core items. Additional question topics included: politics in general, mobility, housing, schools, segregation, and social attitudes and opinions.
Demographic information collected includes age, race, sex, religion, marital status, education, income, and geographic origin.
Midlife in the United States (MIDUS 3), 2013-2014 (ICPSR 36346)
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.
New Family Structures Study (ICPSR 34392)
Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Calendar Data, 2000-2010 [Restricted] (ICPSR 32282)
The Calendar data files are comprised of 47 total parts spread across 13 distinct topical domains.
- Academic Achievement
- Antisocial Activity
- Community-Based Services
- Contact With the Justice System
- Court Monitoring
- Gainful Activity
- Head Injury
- Living Situation
- Making and Spending Money
- Medication
- Out of Community Placement
- Romance
- School
Each topical domain contains multiple reference periods for looking at the topic across the entire data collection period of the study.
Users who request these restricted data should first review the documentation available from NAHDAP (user guide and frequency codebooks) and from the Pathways Website (domain content codebooks). This review will help determine which specific datasets will be needed for your project. The "Research Description" in ICPSR's Data Access Request System (IDARS) must include a specific explanation of why you need each topic domain selected on the "Data Selection" page in IDARS. Most projects should only require one reference period per topic domain being requested. Data requests for all reference periods within a given domain will not be approved without a satisfactory explanation of why all of the reference periods are required for your project. Since the Calendar data collection is very extensive and Restricted Data Use Agreements are only for 2 years, data requests are not expected to need the entire Calendar data collection.
The Pathways to Desistance study was a multi-site study that followed 1,354 serious juvenile offenders from adolescence to young adulthood in two locales between the years 2000 and 2010. Enrolled into the study were adjudicated youths from the juvenile and adult court systems in Maricopa County (Phoenix), Arizona (N=654) and Philadelphia County, Pennsylvania (N=700).
Respondents were enrolled and baseline interviews conducted from November 2000 to January 2003. Follow-up interviews were then scheduled with the respondents at 6, 12, 18, 24, 30, 36, 48, 60, 72 and 84 months past their baseline interview.
The enrolled youth were at least 14 years old and under 18 years old at the time of their committing offense and were found guilty of a serious offense (predominantly felonies, with a few exceptions for some misdemeanor property offenses, sexual assault, or weapons offenses).
Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Collateral Measures, 2000-2004 (ICPSR 32881)
The Pathways to Desistance study was a multi-site study that followed 1,354 serious juvenile offenders from adolescence to young adulthood in two locales. Enrolled into the study were adjudicated youths from the juvenile and adult court systems in Maricopa County (Phoenix), Arizona (N=654) and Philadelphia County, Pennsylvania (N=700) from 2000 through 2010.
This study looks at interviews conducted with the collateral informants who participated in the study. The collateral informants were nominated by the main study participant and represented individuals who "knew the study participant well". At the interview baseline the collateral informant was usually a biological parent. During the three follow-up interviews the majority of collaterals were a friend. Collateral informants could also be a sibling, significant other, or relative. Collaterals were asked questions in regards to the main study participant's life, allowing for comparison between responses provided by two sources. A baseline interview was conducted with the collateral after the baseline interview took place with the main participant. Additional waves of follow-up with collaterals took place at 12, 24, and 36 months. A collateral report is not present for all of the main study participant interviews across waves (see response rate below).
Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Collateral Measures - Scales, 2000-2010 (ICPSR 36867)
The Pathways to Desistance study was a multi-site study that followed 1,354 serious juvenile offenders from adolescence to young adulthood in two locales between the years 2000 and 2010. Enrolled into the study were adjudicated youths from the juvenile and adult court systems in Maricopa County (Phoenix), Arizona (N=654) and Philadelphia County, Pennsylvania (N=700).
This study looks at interviews conducted with the collateral informants who participated in the study. The collateral informants were nominated by the main study participant and represented individuals who "knew the study participant well". At the interview baseline the collateral informant was usually a biological parent. During the three follow-up interviews the majority of collaterals were a friend. Collateral informants could also be a sibling, significant other, or relative. Collaterals were asked questions in regards to the main study participant's life, allowing for comparison between responses provided by two sources. A baseline interview was conducted with the collateral after the baseline interview took place with the main participant. Additional waves of follow-up with collaterals took place at 12, 24, and 36 months. A collateral report is not present for all of the main study participant interviews across waves (see response rate below).
The current Collateral Measures study primarily consists of the calculated scores from constructs asked about during the interview, but the individual scale items were withheld at that time. These additional datasets contain those individual items plus the calculated scores. These variables are typically consistent across the waves that the scale was asked about during the course of the entire project. Most of the files contain variables from all four waves of data collection. The table in the front of the User Guide will list which waves are present in each data file.
Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Release Measures, 2000-2010 [Restricted] (ICPSR 34488)
The Pathways to Desistance study was a multi-site study that followed 1,354 serious juvenile offenders from adolescence to young adulthood in two locales between the years 2000 and 2010. Enrolled into the study were adjudicated youths from the juvenile and adult court systems in Maricopa County (Phoenix), Arizona (N=654) and Philadelphia County, Pennsylvania (N=700).
The Release data portion of the Pathways study contains information from 1,130 interviews ("release interviews") reflecting the youths' perceptions regarding various aspects of the residential experience and institutional environment (e.g., accounts of program operations and services provided, ratings regarding the participant's feelings of his or her safety in the facility). The release interview was conducted within 30 days prior to or after release from a facility and in a separate session apart from the time point interview. This was done to minimize the burden on the research participant and to ensure adequate attention to institutional ratings. The restricted time period within which to conduct the release interview reduced the likelihood that intervening events and experiences would skew the participant's recall of the stay.
Study participants could contribute more than one release interview, depending upon the number of institutional placements he/she had over the seven-year follow-up period. The current release data reflects ratings from 686 unique individuals. It should be recognized that not every institutional stay for every youth produced a release interview. On the basis of the number of reported institutional stays in the sample, it is estimated that a release interview was obtained for approximately 54 percent of the total number of residential stays experienced by study participants. Release interviews were missed if the research interviewer was not aware of the institutional stay (e.g. it occurred between time point interviews) or if the interviewer only became aware of the institutional stay at a point that was too late to schedule a release interview within the required window surrounding the release date.
The 686 individuals reflected in the release data represent 51 percent of the Pathway study participants (n=1,354) and 56 percent of Pathways participants who had a least one institutional stay (n=1,234; 120 Pathways youths had no institutional stays). On average, these 686 youths had 1.6 interviews. The number of interviews per unique person ranges from one to eight.
Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Subject Measures, 2000-2010 (ICPSR 29961)
The Pathways to Desistance study was a multi-site study that followed 1,354 serious juvenile offenders from adolescence to young adulthood in two locales between the years 2000 and 2010. Enrolled into the study were adjudicated youths from the juvenile and adult court systems in Maricopa County (Phoenix), Arizona (N=654) and Philadelphia County, Pennsylvania (N=700).
Respondents were enrolled and baseline interviews conducted from November 2000 to January 2003. Follow-up interviews were then scheduled with the respondents at 6, 12, 18, 24, 30, 36, 48, 60, 72 and 84 months past their baseline interview.
The enrolled youth were at least 14 years old and under 18 years old at the time of their committing offense and were found guilty of a serious offense (predominantly felonies, with a few exceptions for some misdemeanor property offenses, sexual assault, or weapons offenses).
The baseline interview was conducted within 75 days of the youth's adjudication hearing. For youths in the adult system, the baseline interview was conducted within 90 days of either (a) the decertification hearing in Philadelphia, a hearing at which it is determined if the case will remain in adult court or if it will be sent back to juvenile court; or (b) the adult arraignment hearing in Phoenix, the point in the Arizona adult system at which charges have been formally presented.
The aims of the investigation were to identify initial patterns of how serious adolescent offenders stop antisocial activity, to describe the role of social context and developmental changes in promoting these positive changes, and to compare the effects of sanctions and interventions in promoting these changes. The larger goals of the Pathways to Desistance study were to improve decision-making by court and social service personnel and to clarify policy debates about alternatives for serious adolescent offenders. The study relied primarily on self-report information from study participants.
Each wave of data collection covered six domains: (1) background characteristics (e.g., demographics, academic achievement, psychiatric diagnoses, offense history, neurological functioning, psychopathy, personality), (2) indicators of individual functioning (e.g., work and school status and performance, substance abuse, mental disorder, antisocial behavior), (3) psychosocial development and attitudes (e.g., impulse control, susceptibility to peer influence, perceptions of opportunity, perceptions of procedural justice, moral disengagement), (4) family context (e.g., household composition, quality of family relationships), (5) personal relationships (e.g., quality of romantic relationships and friendships, peer delinquency, contacts with caring adults), and (6) community context (e.g., neighborhood conditions, personal capital, and community involvement). Information about the measures used to capture this information can be found on the Pathways to Desistance website.
Research on Pathways to Desistance [Maricopa County, AZ and Philadelphia County, PA]: Subject Measures - Scales, 2000-2010 (ICPSR 36800)
The Pathways to Desistance study was a multi-site study that followed 1,354 serious juvenile offenders from adolescence to young adulthood in two locales between the years 2000 and 2010. Enrolled into the study were adjudicated youths from the juvenile and adult court systems in Maricopa County (Phoenix), Arizona (N=654) and Philadelphia County, Pennsylvania (N=700).
Respondents were enrolled and baseline interviews conducted from November 2000 to January 2003. Follow-up interviews were then scheduled with the respondents at 6, 12, 18, 24, 30, 36, 48, 60, 72 and 84 months past their baseline interview.
The enrolled youth were at least 14 years old and under 18 years old at the time of their committing offense and were found guilty of a serious offense (predominantly felonies, with a few exceptions for some misdemeanor property offenses, sexual assault, or weapons offenses).
Each wave of data collection covered six domains: (1) background characteristics (e.g., demographics, academic achievement, psychiatric diagnoses, offense history, neurological functioning, psychopathy, personality), (2) indicators of individual functioning (e.g., work and school status and performance, substance abuse, mental disorder, antisocial behavior), (3) psychosocial development and attitudes (e.g., impulse control, susceptibility to peer influence, perceptions of opportunity, perceptions of procedural justice, moral disengagement), (4) family context (e.g., household composition, quality of family relationships), (5) personal relationships (e.g., quality of romantic relationships and friendships, peer delinquency, contacts with caring adults), and (6) community context (e.g., neighborhood conditions, personal capital, and community involvement). Information about the measures used to capture this information can be found on the Pathways to Desistance website.
The current Subject Measures study primarily consists of the calculated scores from constructs asked about during the interview, but the individual scale items were withheld at that time. These variables are typically consistent across the waves that the scale was asked about during the course of the entire study. Most of the files contain variables from all 11 waves of data collection. The table in the front of the User Guide will list which waves are present in each data file.
Study of Women's Health Across the Nation (SWAN), 2001-2003: Visit 05 Dataset (ICPSR 30501)
Study of Women's Health Across the Nation (SWAN), 2002-2004: Visit 06 Dataset (ICPSR 31181)
Study of Women's Health Across the Nation (SWAN), 2006-2008: Visit 10 Dataset (ICPSR 32961)
Study of Women's Health Across the Nation (SWAN): Visit 01 Dataset, [United States], 1997-1999 (ICPSR 29221)
The Study of Women's Health Across the Nation (SWAN) is a multi-site longitudinal, epidemiologic study designed to examine the health of women during their middle years. The study examines the physical, biological, psychological, and social changes during this transitional period. The goal of SWAN's research is to help scientists, health care providers and women learn how mid-life experiences affect health and quality of life during aging. The data include questions about doctor visits, medical conditions, medications, treatments, medical procedures, relationships, smoking, and menopause related information such as age at pre-, peri- and post-menopause, self-attitudes, feelings, and common physical problems associated with menopause.
The study is co-sponsored by the National Institute on Aging (NIA), the National Institute of Nursing Research (NINR), the National Institutes of Health (NIH), and the NIH Office of Research on Women's Health. The study began in 1994. Between 1997 and 1999, 2,881 of the 3,302 women that joined SWAN were seen for their first follow-up visit. The research centers are located in the following communities: Detroit, MI; Boston, MA; Chicago, IL; Oakland and Los Angeles, CA; Newark, NJ; and Pittsburgh, PA. SWAN participants represent five racial/ethnic groups and a variety of backgrounds and cultures.
Youth Development Study, 1988-2020 [St. Paul, Minnesota] (ICPSR 24881)
The Youth Development Study (YDS) was initiated as a school-based study of adolescent children and their parents to examine the consequences of formative experiences in adolescence for mental health, value formation, educational achievement, and multiple facets of behavioral adjustment. Particular attention was directed to the impacts of early work experience. Data were also obtained about parent-child and peer relationships and experiences in school. As the study continued, the focus shifted to adult development and attainment and, most recently, mid-life adjustment and health. This comprehensive longitudinal study now encompasses three generations: the initial cohort studied from adolescence to mid-life (G2), their parents (G1), and their adolescent children (G3). Data from three generations in the same families enable study of intergenerational relationships and differences in the experience of adolescence and transition to adulthood across parent and child cohorts. The YDS covers a wide range of topics of interest to sociologists, social psychologists, developmental psychologists, and life course scholars, including the development and impacts of agentic resources, socioeconomic attainment, processes of inter- and intra-generational mobility, objective and subjective work conditions, family relationships, intergenerational relationships, mental and physical health, and well-being.
In-school administration of paper surveys during the first four years of the study was supplemented by mailed surveys. Subsequent data collection took place entirely by mail, with 19 surveys conducted between 1988 and 2011. A final survey was conducted on-line in 2019. Survey data was obtained from the parents (G1) of this cohort during the first and fourth waves of the study (1988 and 1991). Surveys of the children (G3) began in 2009, continued in 2010 and 2011 (by mail) and in 2019-2020 (online).
The Youth Development Study measures a wide range of formative experiences and both psychological and behavioral variables, using survey methodology.
The G1 surveys obtained information about socioeconomic background as well as attitudes toward teenage employment, the parents' own employment as teenagers, their current work experiences, and educational expectations for their children.
The G2 surveys during the high school years included detailed questions about students' work and volunteer experiences, as well as experiences in their family, school, and peer groups, with an emphasis on the ways that working affected other life domains, mental health, and well-being. Shorter surveys containing many of the same topics were administered to students in 1992, 1993, and 1994, and included questions about current family and living arrangements. In 1995, a full survey was administered covering the wide range of topics included in previous surveys as well as information about career plans and life events that had occurred in the past five years. G2 Waves 9 through 19 (1997-2011) included many of the same questions contained in earlier surveys and additional sections that focused on the respondents' educational experiences, family relationships, sources of living expenses, and health and well-being. The most recent G2 survey (2019), administered on-line, included questions about support of aging parents. The YDS is unique in its coverage of both objective and subjective work experiences from adolescence to mid-life.
The topics covered by the G3 surveys are very similar to the G2 variables described above. Variables in each G2 and G3 wave are included in cross-wave codebooks, available at the Data Archive Codebook website.
For an overview of the Youth Development Study, see Mortimer, Jeylan T. (2012) "The Evolution, Contributions, and Prospects of the Youth Development Study: An Investigation in Life Course Social Psychology." Social Psychology Quarterly 75(1, March):5-27.