Titel Deelnemers "Korte inhoud" "Identity Matters for Well-Being: The Longitudinal Associations Between Identity Processes and Well-Being in Adolescents with Different Cultural Backgrounds" "Koen Luyckx" "Adolescents' identity processes and their levels of well-being are likely to be intertwined. On the one hand, how adolescents cope with the core developmental task of forming their identity has important implications for their well-being. On the other hand, experiencing a condition of well-being can help adolescents consolidate their identity. This longitudinal study adopted a multidimensional and culturally sensitive perspective to unravel how identity processes (i.e., commitment, in-depth exploration, and reconsideration of commitment) in two domains (i.e., educational and interpersonal identity) were developmentally related to multiple indicators of positive well-being (i.e., physical health, subjective, psychological, and social well-being) in adolescents with different cultural backgrounds. Participants were 1396 adolescents (Mage = 15.73, SDage = 1.23, 49.93% females; 20.89% with a migrant background) who completed questionnaires at four-time points across one year. Results of cross-lagged models confirmed the positive reciprocal associations between identity commitment and well-being in all its facets. The nuanced picture of associations of in-depth exploration and reconsideration of commitment with multiple dimensions of well-being highlighted the importance of adopting a multi-dimensional perspective on well-being and a domain-specific approach to identity. Multigroup analyses indicated that the associations between identity commitment in the educational domain and well-being are relevant, especially for adolescents with a migrant background. Overall, this study highlights the centrality of identity processes for adolescents' adaptation and points to a dynamic loop of reciprocal influences at the core of youth positive development." "Illness Identity and Well-Being in Congenital Heart Disease: Directionality of Effects and Developmental Trajectories" "Sara Campens, Elise Van Laere, Liesbet Van Bulck, Philip Moons, Koen Luyckx" "OBJECTIVE: This longitudinal study explores the relationship between illness identity and well-being in emerging adults with congenital heart disease (CHD), aiming to understand the factors contributing to well-being in individuals with CHD. METHOD: Dutch-speaking emerging adults with CHD (N = 254, age range = 24-28 years) participated in a three-wave study, which is part of the I-DETACH 2 project. Cross-lagged analyses examined the directionality of effects between illness identity and well-being. Multivariate latent class growth analysis identified developmental trajectory classes of illness identity. Multigroup latent growth curve modeling investigated differences in the development of well-being among these classes. RESULTS: Bidirectional associations were uncovered between illness identity and well-being. For instance, acceptance predicted better quality of life and less depressive symptoms over time. Three trajectory classes of illness identity were identified: high (i.e., as compared to the sample mean) acceptance and enrichment with low rejection and engulfment (Class 1), high rejection with low levels in the other dimensions (Class 2), and high rejection and engulfment along with high enrichment and low acceptance (Class 3). Individuals in Class 3 experienced the worse well-being. In addition, individuals with complex heart defects were strongly represented in this class. CONCLUSIONS: This study demonstrates the significance of illness identity in understanding individual differences in well-being among emerging adults with CHD. Additionally, this study provided valuable insight in the development of illness identity and its longitudinal relationship with well-being. (PsycInfo Database Record (c) 2024 APA, all rights reserved)." "Anxiety and Depression in Adults With Congenital Heart Disease" "Koen Luyckx, Werner Budts, Liesbet Van Bulck, Philip Moons" "BACKGROUND: A comprehensive understanding of adult congenital heart disease outcomes must include psychological functioning. Our multisite study offered the opportunity to explore depression and anxiety symptoms within a global sample. OBJECTIVES: In this substudy of the APPROACH-IS (Assessment of Patterns of Patient-Reported Outcomes in Adults With Congenital Heart Disease-International Study), the authors we investigated the prevalence of elevated depression and anxiety symptoms, explored associated sociodemographic and medical factors, and examined how quality of life (QOL) and health status (HS) differ according to the degree of psychological symptoms. METHODS: Participants completed the Hospital Anxiety and Depression Scale, which includes subscales for symptoms of anxiety (HADS-A) and depression (HADS-D). Subscale scores of 8 or higher indicate clinically elevated symptoms and can be further categorized as mild, moderate, or severe. Participants also completed analogue scales on a scale of 0 to 100 for QOL and HS. Analysis of variance was performed to investigate whether QOL and HS differed by symptom category. RESULTS: Of 3,815 participants from 15 countries (age 34.8 ± 12.9 years; 52.7% female), 1,148 (30.1%) had elevated symptoms in one or both subscales: elevated HADS-A only (18.3%), elevated HADS-D only (2.9%), or elevations on both subscales (8.9%). Percentages varied among countries. Both QOL and HS decreased in accordance with increasing HADS-A and HADS-D symptom categories (P" "Comparing youth with and without type 1 diabetes on perceived parenting and peer functioning: a propensity weighting approach" "Koen Raymaekers, Philip Moons, Sofie Prikken, Eva Goossens, Koen Luyckx" "The premise of this study was to gain more insight into whether type 1 diabetes (T1D) can impact how youth perceive parents and peers. To address limitations of previous observational studies comparing youth with T1D to control youth, propensity weighting was used to mimic a randomized controlled trial. A total of 558 youth with T1D and 426 control youth (14-26y) completed questionnaires on parental responsiveness, psychological control, overprotection, friend support, extreme peer orientation, and a host of background and psychological functioning variables. The groups were statistically weighted to become as comparable as possible except for disease status. The analysis plan and hypotheses were preregistered on the open science framework. Youth with T1D perceived their mothers to be more overprotective, perceived fewer friend support, and were less extremely oriented toward peers than control youth. There were no group differences for paternal overprotection and paternal and maternal responsiveness and psychological control. Mothers of youth with T1D seem at risk to practice overprotective parenting and clinicians could play an important role in making mothers aware of this risk. However, the absence of group differences for the maladaptive parenting dimension of psychological control and adaptive dimension of responsiveness are reassuring and testify to the resilient nature of youth with T1D and their families. Additionally, there is accumulating evidence that T1D could interfere with engaging in supportive friendships." "Longitudinal development of non-suicidal self-injury disorder in adolescence: Prospective prediction of stability and change by identity development, depression, trauma, and resilience" "Koen Luyckx, Laurence Claes" "BACKGROUND: With the introduction of non-suicidal self-injury disorder (NSSI-D) in DSM-5, the field obtained a standardised set of criteria to study those engaging in more severe and chronic NSSI. To date, no previous research has studied the development of NSSI-D longitudinally, leaving questions on its stability and potential prospective predictors unanswered. METHODS: 2162 community adolescents (M = 15.00 years, SD = 1.88, 53.9 % girls at T1) completed a set of self-report questionnaires for three consecutive years and were classified into three severity-based NSSI subgroups (no-NSSI, subthreshold-NSSI, NSSI-D). Multinomial logistic regression analyses were used to prospectively predict subgroup membership by age, gender, identity development, depressive symptoms, traumatic experiences, and resilience. RESULTS: At baseline, the sample was distributed over the no-NSSI group (88 %), the subthreshold-NSSI (6 %) and NSSI-D (6 %) groups. These groups respectively showed high (93.5 %), low (25 %) and moderate (47.5 %) stability over one-year intervals. Longitudinally, higher levels of identity confusion and trauma significantly increased the likelihood of transitioning to subthreshold-NSSI. Moreover, boys had a higher likelihood of transitioning from NSSI-D to no-NSSI over the course of one year. CONCLUSIONS: This three-year study provides the first indication of the longitudinal course of NSSI-D with the current set of DSM-5 criteria. Clinically, the results suggest the particular potential of identity confusion and trauma as prevention targets in community adolescents." "Psychological Functioning of Childhood Cancer Survivors: Longitudinal Associations With the Parental Context" "Elise Van Laere, Koen Raymaekers, Sofie Prikken, Jurgen Lemiere, Anne Uyttebroeck, Koen Luyckx" "OBJECTIVE: The long-term psychological effects of childhood cancer vary, with childhood cancer survivors reporting depressive symptoms, fear of cancer recurrence, and benefit finding. As cancer is considered a family disease, investigating the parental context may provide insight into such individual differences in psychological functioning of survivors. This study examined the directionality of effects among parental sense of incompetence, parenting dimensions (responsiveness, psychological control, and overprotection), and survivor psychological functioning (depressive symptoms, fear of cancer recurrence, and benefit finding). METHOD: This three-wave longitudinal study (covering 2 years) included 125 Dutch-speaking childhood cancer survivors (ages 14-24, 95.2% diagnosed < 18 years, and time since diagnosis 2-22 years), 114 mothers, and 91 fathers. Survivors reported (SR) about their psychological functioning and perceived parenting. Mothers reported (MR) and fathers reported (FR) about parenting and sense of incompetence. Cross-lagged panel models were estimated for each informant's perspective on parenting separately. RESULTS: Different relations were obtained for each informant. Primarily unidirectional relations were found from parental sense of incompetence to maladaptive parenting (psychological control across informants and maternal overprotection SR) and from parenting to survivor functioning. Maternal and paternal responsiveness SR positively predicted survivors' benefit finding and negatively predicted survivors' depressive symptoms, respectively. Responsiveness MR and overprotection MR positively predicted survivors' fear of cancer recurrence and depressive symptoms, respectively. One consistent reverse pathway emerged: maternal and paternal responsiveness SR negatively predicted maternal and paternal sense of incompetence, respectively. CONCLUSION: The results support parent-driven processes impacting survivors' psychological functioning and stress the need to focus on multiple perspectives when investigating family dynamics. (PsycInfo Database Record (c) 2023 APA, all rights reserved)." "The Self-Concept and Identity Measure in Patients with Personality Disorders: A Psychometric Evaluation and Associations With Identity Processes, Core Domains of Self-Functioning, and Personality Disorder Symptoms" "Koen Luyckx, Laurence Claes" "As developmental and clinical research on identity has largely developed in disconnect, scholars recommend adopting a developmental psychopathology perspective on identity, which considers adaptive and pathological identity functioning. Such a perspective has also been introduced in the Diagnostic and Statistical Manual of Mental Disorders (5th ed.; DSM-5) Alternative Model for Personality Disorders (AMPD), which suggests that all personality disorders (PDs) are marked by moderate to extreme deficits in self-functioning (i.e., identity and self-direction). The present study aims to validate the Dutch Self-Concept and Identity Measure (SCIM), a 27-item self-report questionnaire that assesses consolidated identity, disturbed identity, and lack of identity, in 153 psychiatric inpatients with PDs (75.2% female; Mage = 31.73). We investigated the factor structure and reliability of the SCIM, and examined associations of SCIM scales with typical identity processes, AMPD domains of self-functioning, and symptoms of all PDs. Results indicated that a 23-item Dutch SCIM produced valid and reliable scores among patients with PDs. Furthermore, SCIM scales were significantly and differentially related to identity commitment processes, ruminative identity exploration, domains of self-functioning, and symptoms of all PDs. Moreover, findings indicated that PDs varied regarding the severity of identity impairment." "Identity Formation and General and Cancer-specific Functioning in Adolescent and Emerging Adult Survivors of Childhood Cancer: A Longitudinal Study into Directionality of Effects" "Sofie Prikken, Elise Van Laere, Jurgen Lemiere, Laurence Claes, Philip Moons, Anne Uyttebroeck, Sandra Jacobs, Koen Luyckx" "BACKGROUND: Adolescent and emerging adult survivors of childhood cancer generally adjust well psychologically similar to their peers. Nevertheless, some survivors are at greater risk for developing psychological and physical difficulties. To shed light on the psychosocial functioning of adolescent and emerging adult survivors of childhood cancer, personal identity formation and its interplay with general and cancer-specific functioning need to be investigated. PURPOSE: To examine the longitudinal associations linking identity formation to general and cancer-specific functioning in adolescent and emerging adult childhood cancer survivors using three-wave data over a 2-year period. METHODS: Dutch-speaking survivors (at baseline: n = 125; 53% female; age range: 14-25 years) treated at the pediatric oncology department of the University Hospitals Leuven (Belgium), completed self-report questionnaires at three annual timepoints. Directionality of effects and correlated changes were examined using cross-lagged structural equation modeling. RESULTS: Regarding general functioning, bidirectional effects occurred. Life satisfaction positively predicted identity synthesis and both life satisfaction and good physical functioning negatively predicted identity confusion over time. Identity synthesis, in turn, positively predicted life satisfaction and identity confusion negatively predicted good physical functioning over time. Regarding cancer-specific functioning, mainly unidirectional effects occurred. Post-traumatic stress symptoms negatively predicted identity synthesis and positively predicted identity confusion over time, whereas the reverse pattern of associations was found for benefit finding. Several correlated changes were found linking identity formation and psychosocial functioning as well. CONCLUSIONS: The present study uncovered clinically meaningful pathways linking identity formation to psychosocial functioning over time in adolescents and emerging adults who survived childhood cancer." "The Longitudinal Link Between Personality and Relationship Quality in Emerging Adults: Mediation by Identity?" "Koen Luyckx" "Illness Perceptions and Illness Identity in Adolescents and Emerging Adults With Neuromuscular Disorders" "Sam Geuens, Koen Raymaekers, Sofie Prikken, Nathalie Goemans, Liesbeth De Waele, Jurgen Lemiere, Koen Luyckx" "BACKGROUND: Neuromuscular disorders (NMD) are intrusive medical conditions with implications for psychosocial development. OBJECTIVES: This paper explores illness perceptions and illness identity dimensions of youth with NMD. First, we compare illness identity outcomes and illness perceptions of NMD patients with a comparison group of adolescents with type 1 diabetes mellitus (DM). Second, we report about the relationships between NMD-related variables and illness perceptions and illness identity. METHODS: Scores on the Brief Illness Perception Questionnaire and the Illness Identity Questionnaire were compared between a group of NMD patients (N = 59; 12-22 years) and an age- and gender-matched group of DM patients (N = 118). NMD-related variables included time since diagnosis, prognosis, wheelchair use, and physical limitations. RESULTS: Youth with NMD scored significantly higher on two of the four illness identity dimensions than youth with DM. NMD patients reported significantly less positive illness perceptions, experienced more physical symptoms, and had a lower score on understanding of their illness. Within the NMD group, wheelchair-users have a better understanding of their disease than those who are not wheelchair-bound. CONCLUSIONS: The present study is the first to investigate illness identity and illness perceptions in NMD. More research is needed to provide insight in the identity formation process of the growing group of adolescents with NMDs."