LifE Study

Additional unique features of the LifE study with regard to basic research are the broad survey of different domains, and the investigation of three intra-family generations in a multi-actor approach.
Current Management 	Fred Berger, Wolfgang Lauterbach
Founder 	Helmut Fend
Duration 	Since 1979 (ongoing)
Participating Universities	University of Potsdam, University of Innsbruck, University of Zurich, University of Konstanz
Website in German 	https://life3g.de
The LifE study (Lebensverläufe ins frühe Erwachsenenalter or Lebensverläufe ins fortgeschrittene Erwachsenenalter; in English ‘Life Paths into Early Adulthood’ or ‘Life Paths into Later Adulthood’) is a prospective German panel study ongoing since 1979. The study examines the individual development of approximately 1500 participants from the age of 12 onward in the context of familial relationships and various life domains across multiple life stages. It is one of the few studies worldwide and the only one in the German-speaking region that follows life paths over four decades.
==Goals and Significance of the LifE Study==
The LifE study significantly contributes to the scientific discourse on life courses in changing historical and societal contexts in the areas of education and career, personality, physical and mental health, as well as intergenerational relationships and the transmission of cultural, religious, and political orientations. Among numerous other important insights, the study, for example, has provided evidence of remarkable societal changes in educational cultures, particularly regarding increases in respect and empathy for adolescents in school and family, through the comparison of parent generations with their children using identical questions about schooling and upbringing. In the German-speaking region, there is no comparable database that can document this clear humanization of educational cultures in recent decades.
The next survey of the now approximately 57-year-old participants and their children will take place in 2024 under the name " LifE3G." The study is conducted collaboratively by scientists from the Universities of Potsdam, Innsbruck, and Zurich, including Helmut Fend, who established the study as the "Konstanzer Jugendstudie" (Konstanz Youth Study) at the University of Konstanz.
The LifE study is and has been funded by the German Research Foundation (DFG), the Austrian Science Fund (FWF), and the Swiss National Science Foundation (SNF).
==History of the LifE Study==
The LifE Study originated from the Konstanz Youth Study. The Konstanz Youth Study, a longitudinal study, surveyed approximately 2000 children and adolescents born between 1962 and 1969 in Frankfurt (on the Main) and two rural regions in Hesse annually from 1979 to 1983; the parents were also included in the survey. The central focus was on psychological and social developmental trajectories during adolescence and the conditions for productive or impaired coping with age-specific developmental tasks.
===LifE - Life Paths into Early Adulthood===
In 2002/04, the now approximately 35-year-old former adolescents were surveyed again. 1657 individuals participated in the contiprotective and risk factors in adolescence were examined. Additional focuses were on the question of the continuity and discontinuity of developmental trajectories, as well as on predicting life coping in early adulthood.
===Life Paths from Late Childhood into Later Adulthood===
The seventh survey conducted in 2012 (the former adolescents were now 45 years old) expanded the study into a three-generation study, which now also included the children (G3) of the anchor generation (G2) in the survey.
===LifE3G===
Due to the COVID-19 pandemic, the eighth survey of mid-50-year-olds was postponed from 2022 to 2024. Under the title “LifE3G study,” the multi-actor and multi-generational approach will be expanded by surveying the entire generation of children of the anchor generation.
==Theoretical Framework of the LifE Study==
Theories of human development across the lifespan have been of central importance since the beginning of the LifE study. The theoretical foundations of the adolescence study (1979–1983) were rooted in a socialization paradigm of growing up in various contexts. With the expansion of the study into early adulthood (Wave 2002, age 35), the framework evolved into a resource-based model of life management. In its third phase (Wave 2012, age 45), the project integrated the perspective of agency and structure, reflecting new interdisciplinary theoretical developments. These are based on both the sociological "life course theory". and the psychological "life-span theory".
In the LifE3G Study of 2024, the framework will be expanded once again. The "Life-cube" serves as a heuristic for understanding developmental predictors throughout an individual’s life history. It is referred to as a cube because three dimensions need to be considered to understand life course processes: firstly, the (most obvious) dimension of time; secondly, the life domains in which demands arise; and finally, the interplay between action potentials and social opportunity structures. It is within these dimensions that people develop their different investment strategies in the process of life management.
==Scientific Relevance and Results of the LifE Study==
The LifE Study contributes to life course research in the scientific fields of psychology, sociology, and the educational and pedagogical sciences. Below are some significant results:
===Education and Career Domain===
When considering educational and career trajectories, a clear result of the study is the early and high predictability of educational attainment and career paths from the age of twelve onward.
Of particular significance is the validation of the meritocratic function of the education system. For highly gifted children from lower social classes, it is evident that academic performance is the most significant factor determining the level of educational attainment. The reproductive function in the professional realm is particularly evident among children from higher social classes. Their educational careers are less dependent on cognitive competencies and more on social background.
The design of the LifE Study also allows for the examination of the long-term effects of attending different types of schools and training programs on career paths. In particular, the effect of "tracking," which is the assignment of children to different types of schools based on their performance in primary school, was examined. The hope of many experts and policymakers that integrated schools (comprehensive schools) would reduce educational inequality, as opposed to tracked schools, was not confirmed. The effect of later or minimized separation of students within integrated schools had no effect on the highest educational qualification obtained.
Many analyses of educational and career trajectories point to the different career paths of men and women. Income and status differences between men and women increase significantly with age. Differences are particularly apparent after the child-raising phase. In international comparison with Canada, for example, it is especially evident that the majority of women who enter the workforce remain in the profession they were initially trained in for more than 20 years. In Canada, however, with a more open education system, it is shown that women in middle adulthood have pursued further education and obtained another degree, such as a bachelor's degree. The gender wage gap is lower in an education system that is permeable. The vocational system in Germany is very good for qualification in youth and young adulthood, but it inhibits the achievement of further qualifications.
===Social Relationships===
Despite certain changes in social relationships from late childhood to middle adulthood, there is also remarkable continuity and predictability in this area. The quality of early family relationship experiences and friendships in adolescence proves to be significant over the long term for the formation of partner relationships and parent-child relationships in adulthood. Close and secure relationships in early family life are important key factors for psychological well-being, emotional stability, and life satisfaction in adulthood. They are significantly more important than educational and career trajectories. In this area, long-term unemployment and experiences of poverty in particular have an impact on mental health.
The study also describes social life trajectories and status transitions such as leaving the parental home, marriage, parenthood, and divorce as event histories and groups them using sequence analyses into patterns of social life trajectories. There are clear gender-specific differences here. For example, mother-daughter relationships are shown to be the closest and most stable over the long term, and the predictive power of family relationship experiences is stronger for women over the long term than for men.
===Intergenerational Transmission of Cultural, Religious, and Political Orientations===
The home and school are identified as core determinants of cultural, religious, and political orientations in adulthood. The significance of the home is particularly surprising. The anchor generation (G2) has largely adopted the political, cultural, and religious orientations of their parents, distancing themselves from them to a much lesser extent than studies suggest.
School proves to be a key institution for imparting refined cultural orientations that many children do not experience at home. Religious ties are almost exclusively formed through parental role models. The strength of value transmission depends significantly on the quality of intrafamilial communication. Positive parent-child relationships and constructive parenting practices in childhood and adolescence are important key factors for the intergenerational transmission of values and behaviors.
===Personality and Health===
Self-efficacy and self-esteem are considered central regulatory processes of agency in personality development analysis. Low self-esteem is specifically identified as a vulnerability factor for the development of depression in early adulthood. It is closely associated with the quality of relationships with parents and peers in adolescence, as well as with the closeness of relationships with partners and friends in adulthood. Conversely, indicators of professional and academic success are significantly less predictive of self-esteem and depression but are highly relevant in the health domain.
In the thirty-year comparison of the educational and interpersonal climate in schools and families between the anchor generation (G2) and their children (G3) ages 12 to 16, remarkable social changes regarding respect and empathy for adolescents in schools and families are evident. Thus, the LifE Study documents a significant humanization of school education in the last three decades.
==Study Design==
The LifE Study is based on a long-term panel design. A cohort of children and adolescents born between 1965 and 1967 in Frankfurt (on the Main) and rural regions of Hesse (anchor generation G2) were surveyed annually from 1979 to 1983, as well as in 2002, 2012, and 2024 (planned). The sample is representative of the West German population at the end of the 1970s in terms of key socio-demographic indicators (e.g., marriage, number of children, income).
In the years 1980 and 1982, the parents of the anchor generation (G1) were also surveyed, and in 2012 and 2024 (planned), the children of the anchor generation (G3) were directly surveyed. Additionally, in 2024, the grandchildren of the anchor generation (G4) will be indirectly included in the study by asking the child generation (G3) questions about them. The response rate of the anchor generation in the long-term study at the ages of 35 and 45 years was approximately 85 percent each.
As three family generations are surveyed, it can be referred to as a multi-generational and multi-actor study. As a multi-domain study, the LifE Study collects data on four areas: "Education and Career," "Family and Partnerships," "Cultural, Religious, and Political Life Orientations," and "Personality and Health." In addition to prospective data, retrospective information was also collected to depict event-specific trajectories in the domains.
==Research project of the LifE3G study (planned for 2024)==
The eighth survey of the anchor generation (G2) strengthens the modeling of domain-specific as well as cross-domain developments and transitions from late childhood to later adulthood. New methodological approaches become possible, as three measurement points in adulthood (ages 35, 45, and 57 years) are available for the anchor generation (G2) in 2024. These include the combination of latent growth processes and change-score models in adolescence with the growth processes in adulthood.
In later adulthood, the analysis focuses on gender differences, occupational success, further education, political orientation, cultural practices, religious affiliation, family values, self-esteem, self-efficacy, depressive symptoms, and skills and motivations, as well as physical health; core research goals also include the prediction of couple relationships and family exchange and solidarity relationships.
Furthermore, the family serves as a context for different development among siblings and for intergenerational transmission processes. This includes the sub-areas of education, partnership quality and parenthood, political orientations, cultural practices, religious affiliations, and family values, as well as parent-child dyads.
==Project Researchers / Staff==
1976–1984: H. Fend, R. Briechle (†), W. Endres (†), B. Fratz-Karremann, S. Gsching, A. Helmke, S. Hiller, W. Knörzer (†), U. Lauterbach, W. Nagl (†), H.-G. Prester, R. Raab, P. Richter, E. Schacher, C. Schellhammer, A. Schmidt, H. Schröder, S. Schröer, P. Schuler, W. Specht, M. Storch, R. Väth-Szusdziara
2000–2009: H. Fend, F. Berger, U. Grob, W. Lauterbach, W. Georg (†), J.-M. Bruggmann, L. Dommermuth, A. B. Erzinger, J. Glaesser, M. Jiménez, A. Sandmeier-Rupena, K. Stuhlmann, D. Looser, S. Givel
2009–2016: F. Berger, W. Lauterbach, H. Fend, W. Georg (†), U. Grob, K. Maag Merki, J. Gläßer, A. E. Grünefelder-Steiger, T. Heyne, S. Kaliga, J. Pehla, K. Schudel, M. Weil, J. Jung, A. Umhauer, J. Turgetto
2023-present: F. Berger, W. Lauterbach, H. Fend, U. Grob, S. Entrich, M. Floiger, S. Gadinger, L. Gleirscher, S. Glieber, W. Hagleitner, J. Jung, P. Nern, J. Turgetto
==Further Reading==
* Entrich S., Lauterbach W.: Shadow education in Germany: Compensatory or status attainment strategy? Findings from the German LifE study. In: International Journal for Research on Extended Education. Volume 7(2), 2019, pp. 143–159, doi:10.3224/ijree.v7i2.04
* Fend H., Berger F., Grob U.: Life Courses, Life Management, Life Happiness: Results of the LifE Study. VS Verlag für Sozialwissenschaften, Wiesbaden 2009, doi:10.1007/978-3-531-91547-0 
* Harris L. M., Gruenenfelder-Steiger A. E., Ferrer E., Donnellan M., Allemand M., Fend H., Conger R., Trzesniewski K.: Do Parents Foster Self-Esteem? Testing the Prospective Impact of Parent Closeness on Adolescent Self-Esteem. In: Child Development. Volume 86(4), 2015, pp. 995–1013, doi:10.1111/cdev.12356 
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