Cited by 160Identity, Memory, and TherapyPersonality Traits and PsychologyChild and Adolescent Psychosocial and Emotional Development

Personal Identity Processes from Adolescence Through the Late 20s: Age Trends, Functionality, and Depressive Symptoms

Open access
Luyckx, Koen, Klimstra, Theo A., Duriez, Bart, Van Petegem, Stijn, Beyers, Wim·2013·Social Development

Abstract

Personal identity formation constitutes a crucial developmental task during the teens and 20s. Using a recently developed five‐dimensional identity model, this cross‐sectional study (N = 5834) investigated age trends from ages 14 to 30 for different commitment and exploration processes. As expected, results indicated that, despite some fluctuations over time, commitment processes tended to increase in a linear fashion. Exploration in breadth and exploration in depth were characterized by quadratic trends, with the highest levels occurring in emerging adulthood. Further, the functionality of these identity processes, and especially of exploration, changed over time. Exploration in breadth and exploration in depth were strongly related to commitment processes especially in adolescence and emerging adulthood, but these exploration processes became increasingly associated with ruminative exploration and depressive symptoms in the late 20s. Theoretical implications and suggestions for future research are outlined.

AI snapshot

Written from the paper’s full text.

TL;DR

This cross-sectional study of 5,834 Belgian participants aged 14–30 examined age trends in five identity processes and how their functionality and links to depressive symptoms differ across adolescence, emerging adulthood, and the late twenties. Commitment processes increased linearly, proactive exploration peaked in emerging adulthood, and exploration became less tied to commitment and more tied to depressive symptoms by the late twenties.

Key findings

  • Commitment making and identification with commitment showed linear age increases: age predicted commitment making (β = .11, p < .001; ΔR² = .012) and identification with commitment (β = .11, p < .001; ΔR² = .012).
  • Exploration in breadth and exploration in depth showed quadratic age trends, with highest levels generally in emerging adulthood: age² predicted exploration in breadth (β = −.20, p < .001; ΔR² = .018) and exploration in depth (β = −.23, p < .001; ΔR² = .014). Ruminative exploration showed no significant age difference (F(1, 5768) = 0.18, ns).
  • Functionality changed with age: exploration in breadth and depth were strongly positively related to commitment processes especially in adolescence and emerging adulthood, but these associations decreased significantly in the late twenties; exploration in depth with ruminative exploration was strongest in the late twenties (r = .33).
  • Depressive-symptom associations also shifted: commitment making was negatively related to depressive symptoms most weakly in adolescence (r = −.13) and more strongly in emerging adulthood (r = −.22) and the late twenties (r = −.35); exploration in breadth was positively related to depressive symptoms most strongly in the late twenties (r = .21); ruminative exploration was positively related to depressive symptoms overall (r = .35), weakest in adolescence (r = .30).

Methods

  • Cross-sectional design combining 13 samples collected in Flanders, Belgium, between 2007 and 2011; total N = 5,834 (66.2% female), mean age 17.99 years (SD = 3.25), range 14–30.
  • Identity processes were measured with the Dimensions of Identity Development Scale (DIDS), five items per process on a 5-point scale; depressive symptoms were measured with the CES-D in 10 of 13 samples (20-item in Sample 8, 12-item in others).
  • Analyses included CFA for factor structure and invariance, MANOVA/MANCOVA with sex and context as factors and age as covariate, hierarchical regressions testing linear and quadratic age trends, and z-tests comparing correlations across adolescence (14–17), emerging adulthood (18–25), and late twenties (26–30).

Limitations

  • The paper states that the cross-sectional design limits conclusions about development and directionality, that the study is descriptive and does not identify mechanisms, and that additional demographic confounds (e.g., living at home, partner status) were not included.
  • The paper states generalizability limits: participants were almost all European-Caucasian, findings may not apply to non-Western or non-White populations, and Arnett’s emerging-adulthood model applies primarily to those with economic means to postpone adult responsibilities.
  • The paper states further limits: only five identity processes regarding future plans/goals/lifestyles were assessed, depressive symptoms were self-reported only without positive well-being indicators, and future research should sample different high school tracks; evident from the text, the late-twenties group was relatively small (N = 220) and age cohorts 25–30 were combined two by two because fewer than 100 individuals belonged to each of the last six age cohorts.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1111/sode.12027

Cites

58 of 58 references verified0 citation errors · 0 not checkable

Statistics

8 tests recomputed · 1 with the reported and recomputed p on opposite sides of .05

Claims the paper makes

0 of 31 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    Exploration in depth had a quadratic age trend from adolescence through the late twenties.

    “exploration in depth (β = -.23,p < .001;ΔR² = .014)”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • Findingown data

    Identification with commitment did not have a meaningful quadratic age trend from adolescence through the late twenties.

    “identification with commitment (β = -.09,p < .001;but ΔR² = .003)”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • Findingown data

    Women scored higher on all identity processes except identification with commitment.

    “women scored higher on all identity processes, except for identification with commitment.”
    Quote in the paperNot a substantial claim
  • Findingown data

    Commitment making increased linearly with age from adolescence through the late twenties.

    “age was a predictor for commitment making (β = .11,p < .001;ΔR² = .012)”
    • Also stated in: § Age Trends in Identity Processes · plain
      “whereas the commitment processes were found to increase linearly with age”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • Findingown data

    Identification with commitment increased linearly with age from adolescence through the late twenties.

    “identification with commitment (β = .11,p < .001;ΔR² = .012)”
    • Also stated in: § Age Trends in Identity Processes · plain
      “whereas the commitment processes were found to increase linearly with age”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • Classified as probably not a substantial claim. 27
  • The quote only partly states this claim. 1
  • May combine two claims. 28
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingown data

    Academic track high school students scored lower on commitment making than technical/vocational track students.

    “students in the academic track scored lower, as compared to students in the technical and vocational track, on commitment making”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S1 (asserted), S3 (load-bearing), S4 (based). The quote only partly states this claim.

    Findingown data

    Exploration in depth increased linearly with age from adolescence through the late twenties.

    “exploration in depth (β = .12,p < .001;ΔR² = .014)”
    • Also stated in: § Age Trends in Identity Processes · hedged
      “coupled with small linear increases for exploration in depth”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingown data

    Academic track high school students scored higher on exploration in depth than technical/vocational track students.

    “and higher on exploration in depth (M = 3.23, SD = 0.76; and M = 3.14, SD = 0.79, respectively)”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Effect sizes for sex, context, and track differences in identity processes were small.

    “all partial η²-values accompanying these mean differences were very small.”
    • Also stated in: § Preliminary Mean-Level Analyses on Identity Processes · plain
      “all effect sizes accompanying these mean differences were small.”
    • Also stated in: § Preliminary Mean-Level Analyses on Identity Processes · plain
      “all partial η²-values accompanying these mean differences were ≤ .01.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingown data

    Academic track high school students scored higher on ruminative exploration than technical/vocational track students.

    “and ruminative exploration (M = 2.82, SD = 0.83; and M = 2.66, SD = 0.88, respectively)”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Exploration in depth was most strongly related to commitment processes in adolescence and least strongly in the late twenties.

    “exploration in depth was the most strongly related to the commitment processes in adolescence and the least strongly so in the late twenties.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • May combine two claims.

    Findingown data

    In adolescence and somewhat less in emerging adulthood, exploration in breadth and exploration in depth were strongly and positively related to commitment, and these positive correlations decreased significantly in strength in the late twenties.

    “Indeed, whereas especially in adolescence and somewhat less in emerging adulthood these two exploration processes were strongly and positively related to commitment, these positive correlations decreased significantly in strength in the late twenties.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    The making of identity commitments was not strongly negatively related to depressive symptoms in adolescence, but this association was significantly stronger in emerging adulthood and beyond.

    “Whereas the making of identity commitments was not that strongly negatively related to depressive symptoms in adolescence, this association was significantly stronger in emerging adulthood and beyond.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingreasoning

    Students in vocational and technical tracks score higher on commitment making and lower on exploration as compared to students in the academic track.

    “Finally, the present findings seemed to suggest that students in the vocational and technical tracks (which directly prepare adolescents for certain jobs or careers) score higher on commitment making and lower on exploration as compared to students in the academic track (which consists of a general, broad education, preparing students for higher education).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Study design and conductown data

    Cronbach's alphas for the identity processes ranged between .83 and .93 for commitment making, .79 and .89 for identification with commitment, .76 and .87 for exploration in breadth, .75 and .83 for exploration in depth, and .80 and .89 for ruminative exploration.

    “Cronbach's alphas ranged between .83 and .93 for commitment making, .79 and .89for identification with commitment, .76 and .87 for exploration in breadth, .75 and .83for exploration in depth, and between .80 and .89for ruminative exploration.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisecitation
    § Personal Identity Processes from Adolescence Through the Late Twenties: Age Trends, Functionality, and Depressive Symptoms

    Identity formation is a core developmental challenge for adolescents and emerging adults.

    “Identity formation is a core developmental challenge for adolescents and emerging adults (Erikson, 1968).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Erikson, 1968

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    Exploration in breadth and exploration in depth became increasingly associated with ruminative exploration and depressive symptoms in the late twenties.

    “Exploration in breadth and exploration in depth were strongly related to commitment processes especially in adolescence and emerging adulthood, but these exploration processes became increasingly associated with ruminative exploration and depressive symptoms in the late twenties.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Cross-sectional age differences in identity processes reflect developmental change over time.
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductown data

    Cronbach's alpha of CESD-20 in Sample 8 was .91, and Cronbach's alphas of CESD-12 ranged between .80 and .88.

    “Cronbach's alpha of CESD-20 in Sample 8 was .91;Cronbach's alphas of CESD-12 ranged between .80 and .88.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Côté and Levine (2002) described a subgroup of individuals in the moratorium status who are driven by excessively high standards and criteria for functioning, which undermine their ability to form a steady set of commitments.

    “Côté and Levine (2002) have described a subgroup of individuals in the moratorium status who are driven by excessively high standards and criteria for functioning, which undermine their ability to form a steady set of commitments.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Côté and Levine (2002)

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Emerging adulthood, especially ages 18-25, is the period of life that offers the most opportunities for identity exploration in different life areas.

    “According to Arnett (2000), emerging adulthood (and especially ages 18-25) is the period of life that offers the most opportunities for identity exploration in different life areas (Waterman & Archer, 1990).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Arnett, 2000

      Not checked in the free run.

    • cites Waterman & Archer, 1990

      Not checked in the free run.

  • May combine two claims.

    Study design and conductcitation

    The DIDS provides highly reliable scores with a clear factor structure in Belgian high school and college student samples.

    “the Dimensions of Identity Development Scale (DIDS), which was originally developed in Dutch and provides highly reliable scores with a clear factor structure in Belgian high school and college student samples (Luyckx, Schwartz, Berzonsky, et al., 2008).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Luyckx, Schwartz, Berzonsky, et al., 2008

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    The making of identity commitments becomes an increasingly normative process with greater repercussions for daily functioning as adolescents make the transition to adulthood.

    “These findings corroborate the view that the making of identity commitments becomes an increasingly normative process with greater repercussions for daily functioning as adolescents make the transition to adulthood.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Identity commitments tend to become more important for one's well-being from emerging adulthood to the late twenties, as evidenced by increased associations with depressive symptoms.

    “Our findings not only suggested that identity commitments become increasingly more integrated in the self, these identity commitments also tend to become more important for one's well-being, as evidenced by the increased associations with depressive symptoms from emerging adulthood to the late twenties.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductreasoning

    The present study remains fairly descriptive and does not provide insights into how the observed age trends came about.

    “Further, the present study remains fairly descriptive and does not provide insights into how the observed age trends came about.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    These individuals seem to be locked in a vicious cycle of continued exploration, contributing to feelings of hopelessness and uncontrollability.

    “These individuals seem to be locked in a vicious cycle of continued exploration, contributing to feelings of hopelessness and uncontrollability.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Ruminative exploration has been positively and strongly related to depressive symptoms, whereas the association of depressive symptoms with exploration in breadth and exploration in depth was less pronounced in adolescents.

    “ruminative exploration has been positively and strongly related to depressive symptoms, whereas the association of depressive symptoms with exploration in breadth and exploration in depth was less pronounced in adolescents.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Luyckx, Schwartz, Goossens, Beyers, & Missotten, 2011

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    Exploration processes in adolescence and emerging adulthood seem to serve an important goal of arriving at and evaluating identity commitments, but these processes seem to become less functional when sustained until the late twenties.

    “In sum, whereas exploration processes in adolescence and emerging adulthood seem to serve an important goal, which is arriving at and evaluating identity commitments, these processes seem to become less functional when sustained until the late twenties.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    The conclusion that exploration processes become less functional when sustained until the late twenties is in line with Waterman and Archer's theorizing.

    “This conclusion is in line with Waterman and Archer's (1990, p. 36) theorizing:”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Waterman and Archer's (1990, p. 36)

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Study design and conductnone given

    The present study had a sufficient amount of males to draw valid conclusions with respect to potential sex differences.

    “although the present study still had a sufficient amount of males to draw valid conclusions with respect to potential sex differences”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    This period in life is also characterized by a high degree of demographic instability and risk behaviors which can be considered symptomatic for extensive identity explorations of some individuals.

    “Previous research indicated that this period in life is also characterized by a high degree of demographic instability and risk behaviors which can be considered symptomatic for extensive identity explorations of some individuals (Arnett, 2005).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Arnett, 2005

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    Through adolescence and emerging adulthood, the making of steady identity commitments becomes increasingly important for one's emotional adjustment.

    “Meeus, Iedema, Maassen, and Engels (2005) already established that, through adolescence and emerging adulthood, the making of steady identity commitments becomes increasingly important for one's emotional adjustment”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Meeus, Iedema, Maassen, and Engels (2005)

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Evidence was found for increased prevalence of the achievement status and decreased prevalence of the diffusion status over time.

    “evidence was found for increased prevalence of the achievement status and decreased prevalence of the diffusion status over time (Meeus et al., 2010)”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Meeus et al., 2010

      Not checked in the free run.

  • May combine two claims.

    Interpretationcitation

    A more solid identity structure emerges as individuals make the transition to adult life, which increasingly enables them to attend to societal expectations and roles.

    “Hence, a more solid identity structure emerges as individuals make the transition to adult life (Meeus, Iedema, Helsen, & Vollebergh, 1999), which increasingly enables them to attend to societal expectations and roles.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Meeus, Iedema, Helsen, & Vollebergh, 1999

      Not checked in the free run.

  • May combine two claims.

    Study design and conductown data

    Virtually all participants were from European-Caucasian descent, which limits the generalizability of the present findings.

    “Second, virtually all of our participants were from European-Caucasian descent, which limits the generalizability of the present findings.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationcitation

    Although exploration is at its peak in emerging adult years, it is not limited to this period in life.

    “Hence, although exploration is at its peak in the emerging adult years, it is not limited to this period in life (Meeus et al., 1999).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Meeus et al., 1999

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    In emerging adulthood, especially commitment making increased linearly, whereas identification with commitment tended to decrease initially, although these decreases levelled off towards the end of the study.

    “Luyckx, Schwartz, Goossens, Soenens, and Beyers (2008) found that in emerging adulthood especially commitment making increased linearly, whereas identification with commitment tended to decrease initially, although these decreases levelled off towards the end of their study.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Luyckx, Schwartz, Goossens, Soenens, and Beyers (2008)

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    The present study's sole reliance on self-reported depressive symptoms as an outcome variable is a limitation.

    “Similarly, an additional limitation of the present study is its sole reliance on self-reported depressive symptoms as an outcome variable.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductreasoning

    The validity of the conclusions that can be drawn based on the present findings is limited to the identity processes and domain assessed.

    “Third, the validity of the conclusions that can be drawn based on the present findings is limited to the identity processes and domain assessed.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Exploration in breadth showed initial increases followed by later decreases.

    “exploration in breadth showed initial increases followed by later decreases”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Luyckx, Schwartz, Goossens, Soenens, and Beyers (2008)

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Commitment making and especially identification with commitment have been negatively related to depressive symptoms.

    “Commitment making and especially identification with commitment have been negatively related to depressive symptoms.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Luyckx, Schwartz, Goossens, Beyers, & Missotten, 2011

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Adolescent girls tend to be further ahead of boys in establishing identity commitments, although boys catch up later.

    “Previous research suggested that adolescent girls tend to be further ahead of boys when it comes to establishing identity commitments, although boys do seem to catch up later on (Meeus et al., 2010).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Meeus et al., 2010

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    The prevalence of the moratorium status tended to increase steadily from midadolescence to the late teens but decreased thereafter.

    “the prevalence of the moratorium status tended to increase steadily from midadolescence to the late teens but decreased thereafter.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Kroger, Martinussen, & Marcia, 2010

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  • Classified as probably not a substantial claim.

    Study design and conductnone given

    The cross-sectional design of the present study limited the validity of the conclusions that could be drawn.

    “First, as noted, the cross-sectional design of the present study limited the validity of the conclusions that could be drawn.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationreasoning

    These findings do not come as a surprise given that, especially in the vocational track, students already have a rather clear view on their future job, whereas this is much less the case for students in the academic track.

    “These findings do not come as a surprise given that, especially in the vocational track, students already have a rather clear view on their future job, whereas this is much less the case for students in the academic track.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationcitation

    With increasing maturation, identity commitments occupy a more prominent place in one's self-definition, both in strength of choices and centrality towards psychosocial functioning.

    “Collectively, these findings suggest that with increasing maturation identity commitments occupy a more prominent place in one's self-definition (Waterman & Archer, 1990), not only with respect to the strength of the choices made, but also with respect to their centrality towards psychosocial functioning.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Waterman & Archer, 1990

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    A recent longitudinal study found that commitment processes appeared to be a stronger predictor of self-esteem over time for college students as compared to high school students.

    “A recent longitudinal study found that commitment processes appeared to be a stronger predictor of self-esteem over time for college students as compared to high school students (Luyckx et al., in press), again indicating that the developmental period under study could partially determine how functional or adaptive certain identity processes may be.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Luyckx et al., in press

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Identity status trajectories obtained in young adulthood (i.e., in the thirties) were quite similar to those obtained in emerging adulthood.

    “Only recently has it been demonstrated that, generally speaking, identity status trajectories obtained in young adulthood (i.e., in the thirties) were quite similar to those obtained in emerging adulthood (Luyckx, Klimstra, Schwartz, & Duriez, in press).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Luyckx, Klimstra, Schwartz, & Duriez, in press

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  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Premisecitation

    Individuals do not only have to make so-called personal identity choices across a wide variety of domains, they also develop personal and social identities in close interaction with the social world.

    “Individuals do not only have to make so-called personal identity choices across a wide variety of domains, they also develop personal and social identities in close interaction with the social world (Schwartz, Luyckx, & Vignoles, 2011).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Schwartz, Luyckx, & Vignoles, 2011

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Identity formation has been cast as a lifelong developmental task characterized by continuous changes and re-evaluations over the adult life span.

    “Identity formation has been cast as a lifelong developmental task characterized by continuous changes and re-evaluations over the adult life span (Kroger, 2000).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Kroger, 2000

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Arnett's (2000) approach applies primarily to those individuals who have the economic wherewithal to postpone adult responsibilities.

    “Relatedly, it is important to note that, despite the sociocultural changes that have created the emerging adult life stage, Arnett's (2000) approach applies primarily to those individuals who have the economic wherewithal to postpone adult responsibilities.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Arnett's (2000)

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  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Premisecitation

    Although the transition to adulthood constitutes a period of life in which future-related choices become very salient, it is by no means the only identity challenge these individuals are confronted with.

    “Although the transition to adulthood constitutes a period of life in which future-related choices become very salient, it is by no means the only identity challenge these individuals are confronted with (Erikson, 1968).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Erikson, 1968

      Not checked in the free run.

46 of 46
  • The paper relies on this without support.

    Cross-sectional age differences in identity processes reflect developmental change over time.

    “this cross-sectional study (N = 5,834) investigated age trends from ages 14 to 30”
    “age trends in identity processes from adolescence through the late twenties”
    “However, in the absence of such a large-scale longitudinal study, the present findings might foreshadow how such developmental trends could look like.”
  • The paper relies on this without support.

    No study to date has assessed whether associations between the five identity processes and depressive symptoms changed significantly from adolescence to the late twenties.

    “No study to date, however, assessed whether associations between the aforementioned five identity processes and depressive symptoms changed significantly from adolescence to the late twenties.”
  • The paper relies on this without support.

    It remains unclear how adaptive and functional different identity processes are for individuals in different developmental periods.

    “it remains unclear how adaptive and functional different identity processes are for individuals in different developmental periods.”
  • The paper relies on this without support.

    The CESD-12 and CESD-20 versions measure depressive symptoms comparably enough to be combined across samples.

    “The 20-item version was used in Sample 8; the brief 12-item version developed by Roberts and Sobhan (1992) was used in the remaining samples.”
  • The paper relies on this without support.

    The thirteen cross-sectional samples collected between 2007 and 2011 in Flanders can be combined into a single sample for age-trend analyses.

    “We used thirteen cross-sectional samples collected between 2007 and 2011 in Flanders”
5 of 5

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Statistics that don’t add up

Each reported p-value recomputed from its test statistic and degrees of freedom.

  • Inconsistent p-value across alpha = .05: F (5, 5763) = 2.86, ns

    Major

    The paper reports a non-significant result (n.s.) here; recomputing from the test statistic and its degrees of freedom gives p = .014. The two fall on opposite sides of alpha = .05. The check cannot tell whether the statistic or the p-value is the misprint.

1 of 1

Statistics recomputed

Every reported test result, recomputed from its test statistic and degrees of freedom. A result shows as not adding up only once an independent check has confirmed it.

  • Doesn’t add upF(5, 5763) = 2.86reported n.s. · recomputed p = .014The two fall on opposite sides of .05

    “F (5, 5763) = 2.86, ns”

  • Consistentχ²(20) = 46.11reported p < .001 · recomputed p < .001

    “χ2 (20) = 46.11,p < .001”

  • Consistentχ²(40) = 250.02reported p < .001 · recomputed p < .001

    “χ2 (40) = 250.02,p < .001”

  • ConsistentF(5, 5767) = 27.59reported p < .001 · recomputed p < .001

    “F (5, 5767) = 27.59,p < .001”

  • ConsistentF(10, 11563) = 18.43reported p < .001 · recomputed p < .001

    “F (10, 11563) = 18.43, p < .001”

  • ConsistentF(5, 3089) = 13.49reported p < .001 · recomputed p < .001

    “F (5, 3089) = 13.49,p < .001”

  • ConsistentF(5, 5764) = 15.72reported p < .001 · recomputed p < .001

    “F (5, 5764) = 15.72,p < .001”

  • ConsistentF(1, 5768) = 0.18reported n.s. · recomputed p = .671

    “F (1, 5768) = 0.18, ns”

8 of 8

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Unemployed group size differs between text and Table 2

    Minor

    The results text says there were 12 unemployed participants, whereas Table 2 reports 14.

1 of 1

Cites

Flagged first, then by citations

1 of the 59 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Cohen J., 1988, Statistical power analyses for the behavioral sciences

Cited by

Sorted by citations

Authors
Luyckx, K., Klimstra, T. A., Duriez, B., Van Petegem, S., & Beyers, W.
Affiliations
  • KU Leuven (BE)
  • Ghent University
  • Ghent University (BE)
Corresponding author
Luyckx, Koen
Venue
Social Development
Publisher
Wiley
Published
2013-06-04
Volume
22
Issue
4
Pages
701-721
ISSN
  • 0961-205X (ISSN-L)
  • 1467-9507
OpenAlex
W2163646491
Cited by
160
References
59
Citations by year
2026: 7 · 2025: 17 · 2024: 12 · 2023: 15 · 2022: 12 · 2021: 21 · 2020: 15 · 2019: 19 · 2018: 10 · 2017: 11 · 2016: 7 · 2015: 9 · 2014: 4
FWCI
12.59
Type
journal article
Language
en
Open access
Locations
  • Social Development (publishedVersion)
  • Research portal (Tilburg University) (publishedVersion)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion, other-oa)
  • Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Topics
  • Social Sciences › Psychology › Developmental and Educational Psychology › Identity, Memory, and Therapy
  • Social Sciences › Psychology › Clinical Psychology › Personality Traits and Psychology
  • Social Sciences › Psychology › Clinical Psychology › Child and Adolescent Psychosocial and Emotional Development
Keywords
personal identity formation, identity commitment, identity exploration, ruminative exploration, depressive symptoms, age trends, emerging adulthood, adolescence, identity models, identity construction

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-10.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-10.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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