One of the key developmental tasks in adolescence is to develop a coherent identity. The current review addresses progress in the field of identity research between the years 2010 and 2020. Synthesizing research on the development of identity, we show that identity development during adolescence and early adulthood is characterized by both systematic maturation and substantial stability. This review discusses the role of life events and transitions for identity and the role of micro‐processes and narrative processes as a potential mechanisms of personal identity development change. It provides an overview of the linkages between identity development and developmental outcomes, specifically paying attention to within‐person processes. It additionally discusses how identity development takes place in the context of close relationships.

In the past, stressful life events have been consistently linked to developmental outcomes such as well-being and psychopathological problems. Theory on identity postulates that stressful life events may also predict a regression in identity development. While some support for this link has been found in adult populations, it is important to examine this in adolescence, a time marked by identity development as well as stressful transitions and experiences. Methods: In the present study, we examined whether having to repeat a grade and death of a family member or friend were related to regressive change in educational and relational identity in a sample of 840 Dutch adolescents (49% female, Mage W1 = 12.4) drawn from a large ongoing longitudinal study. We also investigated whether the impact of the events was moderated by neuroticism, and parental and peer support. All analyses were controlled for age, educational level, and sex. Results: Results of latent difference score models indicated that experiencing an event did not predict regressions in identity. Congruence between the domain of the event and identity (i.e., educational or relational) did not affect the strength of the effects. Neuroticism and parental and peer support did not significantly moderate this link. However, social support was related to relational and educational identity. Conclusions: The link between stressful events and identity may not be as straightforward as would be expected based on identity theory, as our results did not show evidence for a link between these events and change in identity for all adolescents.

Research on the longitudinal association between self-esteem and satisfaction with social relationships has led to ambiguous conclusions regarding the temporal order and strength of this relation. Existing studies have examined this association across intervals ranging from days to years, leaving it unclear as to what extent differences in timing may explain differences across studies. In the present study, we used continuous time structural equation models (i.e., CT-SEM) to examine cross-lagged relations between the constructs, and also distinguished between-person differences from within-person processes (i.e., RI-CT-SEM). We analyzed 10 years of annual data from the Longitudinal Internet Studies of the Social Sciences (N = 14,741). When using CT-SEM, we found a bidirectional positive relation between self-esteem and satisfaction with social relationships, with larger effects over longer intervals. When using RI-CT-SEM, we found the largest effects of self-esteem and satisfaction with social relationships across intervals of 1 year, with smaller effect sizes at both shorter and longer intervals. In addition, the effect of fluctuations in people’s satisfaction with social relationships on fluctuations in their self-esteem was greater than the reverse effect. Our results highlight the importance of considering time when examining the relation between self-esteem and interpersonal outcomes and likely psychological constructs in general.

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Identity development has been linked to substance use, but the directionality of this relationship remains unclear. We examined the longitudinal associations of educational and relational identity with substance use across three annual waves in 360 Dutch adolescents (M age = 13.7 years). We found three latent profiles using the identity dimensions of commitment, exploration, and reconsideration as indicators. Using classification probabilities to determine participants' clusters at each time point, we distinguished stable, progressive, and regressive identity transition groups. No longitudinal associations were found between identity status transitions and substance use in either direction, but we did find significant crosssectional correlations. Therefore, our findings do not support a directional process, but hint at a spectrum/continuity or common cause model.