Lonneke I M Lenferink
Biographic Data
| ID | 4030154 |
|---|---|
| NAME | Lonneke I M Lenferink |
| GIVEN NAMES | Lonneke I M |
| FAMILY NAME | Lenferink |
| SIGNATURE | LENFERINK L I M |
| AFFILIATIONS | University of Groningen |
| ORCID | 0000-0003-1329-6413 |
| VERIFIED | Yes |
| TOTAL WORKS | 17 |
| TOTAL CITATIONS | 7 |
| AUTHOR COUNT | 17 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2014 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
An explainable machine learning approach to predict prolonged grief severity using the MARBLES archive
Prolonged grief disorder (PGD), characterised by persistent and disabling grief, is officially recognised as a mental disorder. Accurate prediction of prolonged grief (PG) symptomatology is vital to intervention efforts. We trained machine learning models to predict PG severity using cross-sectional data from the MARBLES archive ( N = 5570). With explainable AI (XAI), we examined linear and nonlinear relationships, individual differences, and int…
Analyzing transdiagnostic internalizing symptoms in a global sample of trauma‐exposed children using pooled individual participant data
BACKGROUND: Children often experience both posttraumatic stress (PTS) and depression after potentially traumatic events (PTEs). Latent class analyses (LCAs) identify subgroups with different co-occurring symptoms, but little is known about what predicts transitions between these symptom classes over time. Analyzing these transitions could reveal factors that influence the shift to classes with fewer internalizing symptoms. METHODS: Using harmoniz…
Initial Validation of a Measure Assessing DSM-5-TR and ICD-11 Prolonged Grief in Children and Adolescents
Valid and reliable instruments to assess the most recent prolonged grief disorder (PGD) criteria, as defined in the DSM-5-TR and ICD-11, are lacking. This study aimed to provide an initial validation of the Traumatic Grief Inventory—Kids—Clinician-Administered (TGI-K-CA) for assessing Prolonged Grief Disorder (PGD) symptoms in bereaved children and adolescents according to DSM-5-TR and ICD-11 criteria. Ninety bereaved Dutch children (aged 8–18 ye…
Psychometric properties of the Japanese translation of the Traumatic Grief Inventory-Self Report Plus (TGI-SR+)
Prolonged grief disorder (PGD), recently included in the ICD-11 and DSM-5-TR, can be assessed using the Traumatic Grief Inventory-Self Report Plus (TGI-SR+). This study evaluates the psychometric properties of the Japanese translation of the TGI-SR+ using a survey of Japanese adults (N = 505) who had experienced bereavement more than one year earlier. To assess the severity of prolonged grief, depression, anxiety, and posttraumatic stress, partic…
The psychometric properties of the Peruvian traumatic grief inventory-self report plus (TGI-SR+) in bereaved people
This study represents the first validation of the TGI-SR+ in Latin America, contributing to the understanding of bereavement in the Global South. The Peruvian TGI-SR+ demonstrates to be a reliable and valid measure to assess DSM-5-TR PGD and ICD-11 PGD severity
Fluctuations of prolonged grief disorder reactions in the daily life of bereaved people
Loss-adaptation has been described as being characterized by ‘waves of grief’, which may result in a Prolonged Grief Disorder (PGD). Although this assumption about the fluctuating nature of grief is supported by theoretical work, it is not (yet) supported by empirical work. We are the first to explore to what extent PGD reactions fluctuate in everyday life and whether fluctuations in PGD reactions are related to overall PGD levels using experienc…
Predictors of traumatic experiences among individuals experiencing pandemic-related stressors
Covid-19 pandemic impact on funeral service workers’ work-related mental health
COVID-19 may pose a mental health risk to funeral service workers (FSWs). In this cross-sectional survey, 278 Dutch FSWs were assessed three months after the acute phase of the pandemic ended. The FSWs reported on burnout symptoms (BAT-12), work engagement (UWES-9), wellbeing (MHC-SF) mental health indicators, and retrospectively on work stress and perceived support during the acute phase of the pandemic. Data-analyses included descriptive statis…
The Ambiguous Loss Inventory Plus (ALI+)
These descriptive results indicate that the ALI+ seems to cover the intended concept, thus showing promising face and content validity. However, further psychometric evaluations of the ALI+ are needed
The mediating role of state anger in the associations between intentions to participate in the criminal trial and psychopathology in traumatically bereaved people
Victims of crimes have been granted increasing procedural rights to participate in the juridical process since the mid 1990s. However, knowledge about the (anti)-therapeutic effect of participation is limited. We examined the associations between symptom levels of persistent complex bereavement disorder (PCBD), posttraumatic stress disorder (PTSD), and depression and the intention to participate in a criminal trial. Furthermore, we investigated t…
Associations of dimensions of anger with distress following traumatic bereavement
Pending replication of our findings in longitudinal studies, we conclude that anger subtypes relate differently to distress after traumatic loss. Anger toward the self seems the most detrimental type of anger and may therefore be an important target in treatment. (PsycInfo Database Record (c) 2024 APA, all rights reserved)
A Latent Class Analysis on Symptoms of Prolonged Grief, Post-Traumatic Stress, and Depression Following the Loss of a Loved One
We found that the majority of individuals coped well in response to their loss since the no symptom class was the largest class. Post-loss symptoms could be categorized into classes marked by different intensity of symptoms, rather than qualitatively different symptom patterns. The findings indicate that perceiving the loss as more unexpected, finding less meaning in the loss, and loss-related factors, such as the recentness of a loss and the los…
Prolonged grief disorder following the Coronavirus (Covid-19) pandemic
Toward a Better Understanding of Psychological Symptoms in People Confronted With the Disappearance of a Loved One
Further validation of the Traumatic Grief Inventory-Self Report (TGI-SR)
The Traumatic Grief Inventory Self-Report version (TGI-SR) is an 18-item self-report measure. It was designed to assess symptoms of Persistent Complex Bereavement Disorder (PCBD) included in Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 and Prolonged Grief Disorder (PGD) proposed by an international group of experts in grief. The research in this article used data from a bereaved patient sample and people who lost loved ones in th…
I’ve changed, but I’m not less happy
Twenty-three nonclinical relatives of long-term missing persons were interviewed. Patterns of functioning over time were studied retrospectively by instructing participants to draw a graph that best described their pattern. Patterns most frequently drawn were a recovery and resilient/stable pattern. Participants were also asked to select 5 out of 15 cards referring to coping strategies, which they considered most helpful in dealing with the disap…
Identifying key domains of health-related quality of life for patients with chronic obstructive pulmonary disease
Further validation of the Traumatic Grief Inventory-Self Report (TGI-SR)
The Traumatic Grief Inventory Self-Report version (TGI-SR) is an 18-item self-report measure. It was designed to assess symptoms of Persistent Complex Bereavement Disorder (PCBD) included in Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 and Prolonged Grief Disorder (PGD) proposed by an international group of experts in grief. The research in this article used data from a bereaved patient sample and people who lost loved ones in th…
Covid-19 pandemic impact on funeral service workers’ work-related mental health
COVID-19 may pose a mental health risk to funeral service workers (FSWs). In this cross-sectional survey, 278 Dutch FSWs were assessed three months after the acute phase of the pandemic ended. The FSWs reported on burnout symptoms (BAT-12), work engagement (UWES-9), wellbeing (MHC-SF) mental health indicators, and retrospectively on work stress and perceived support during the acute phase of the pandemic. Data-analyses included descriptive statis…
I’ve changed, but I’m not less happy
Twenty-three nonclinical relatives of long-term missing persons were interviewed. Patterns of functioning over time were studied retrospectively by instructing participants to draw a graph that best described their pattern. Patterns most frequently drawn were a recovery and resilient/stable pattern. Participants were also asked to select 5 out of 15 cards referring to coping strategies, which they considered most helpful in dealing with the disap…
Identifying key domains of health-related quality of life for patients with chronic obstructive pulmonary disease
I’ve changed, but I’m not less happy
Twenty-three nonclinical relatives of long-term missing persons were interviewed. Patterns of functioning over time were studied retrospectively by instructing participants to draw a graph that best described their pattern. Patterns most frequently drawn were a recovery and resilient/stable pattern. Participants were also asked to select 5 out of 15 cards referring to coping strategies, which they considered most helpful in dealing with the disap…
Further validation of the Traumatic Grief Inventory-Self Report (TGI-SR)
The Traumatic Grief Inventory Self-Report version (TGI-SR) is an 18-item self-report measure. It was designed to assess symptoms of Persistent Complex Bereavement Disorder (PCBD) included in Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 and Prolonged Grief Disorder (PGD) proposed by an international group of experts in grief. The research in this article used data from a bereaved patient sample and people who lost loved ones in th…
Toward a Better Understanding of Psychological Symptoms in People Confronted With the Disappearance of a Loved One
Prolonged grief disorder following the Coronavirus (Covid-19) pandemic
The mediating role of state anger in the associations between intentions to participate in the criminal trial and psychopathology in traumatically bereaved people
Victims of crimes have been granted increasing procedural rights to participate in the juridical process since the mid 1990s. However, knowledge about the (anti)-therapeutic effect of participation is limited. We examined the associations between symptom levels of persistent complex bereavement disorder (PCBD), posttraumatic stress disorder (PTSD), and depression and the intention to participate in a criminal trial. Furthermore, we investigated t…
Associations of dimensions of anger with distress following traumatic bereavement
Pending replication of our findings in longitudinal studies, we conclude that anger subtypes relate differently to distress after traumatic loss. Anger toward the self seems the most detrimental type of anger and may therefore be an important target in treatment. (PsycInfo Database Record (c) 2024 APA, all rights reserved)
A Latent Class Analysis on Symptoms of Prolonged Grief, Post-Traumatic Stress, and Depression Following the Loss of a Loved One
We found that the majority of individuals coped well in response to their loss since the no symptom class was the largest class. Post-loss symptoms could be categorized into classes marked by different intensity of symptoms, rather than qualitatively different symptom patterns. The findings indicate that perceiving the loss as more unexpected, finding less meaning in the loss, and loss-related factors, such as the recentness of a loss and the los…
The Ambiguous Loss Inventory Plus (ALI+)
These descriptive results indicate that the ALI+ seems to cover the intended concept, thus showing promising face and content validity. However, further psychometric evaluations of the ALI+ are needed
Fluctuations of prolonged grief disorder reactions in the daily life of bereaved people
Loss-adaptation has been described as being characterized by ‘waves of grief’, which may result in a Prolonged Grief Disorder (PGD). Although this assumption about the fluctuating nature of grief is supported by theoretical work, it is not (yet) supported by empirical work. We are the first to explore to what extent PGD reactions fluctuate in everyday life and whether fluctuations in PGD reactions are related to overall PGD levels using experienc…
Predictors of traumatic experiences among individuals experiencing pandemic-related stressors
Covid-19 pandemic impact on funeral service workers’ work-related mental health
COVID-19 may pose a mental health risk to funeral service workers (FSWs). In this cross-sectional survey, 278 Dutch FSWs were assessed three months after the acute phase of the pandemic ended. The FSWs reported on burnout symptoms (BAT-12), work engagement (UWES-9), wellbeing (MHC-SF) mental health indicators, and retrospectively on work stress and perceived support during the acute phase of the pandemic. Data-analyses included descriptive statis…
The psychometric properties of the Peruvian traumatic grief inventory-self report plus (TGI-SR+) in bereaved people
This study represents the first validation of the TGI-SR+ in Latin America, contributing to the understanding of bereavement in the Global South. The Peruvian TGI-SR+ demonstrates to be a reliable and valid measure to assess DSM-5-TR PGD and ICD-11 PGD severity
An explainable machine learning approach to predict prolonged grief severity using the MARBLES archive
Prolonged grief disorder (PGD), characterised by persistent and disabling grief, is officially recognised as a mental disorder. Accurate prediction of prolonged grief (PG) symptomatology is vital to intervention efforts. We trained machine learning models to predict PG severity using cross-sectional data from the MARBLES archive ( N = 5570). With explainable AI (XAI), we examined linear and nonlinear relationships, individual differences, and int…
Analyzing transdiagnostic internalizing symptoms in a global sample of trauma‐exposed children using pooled individual participant data
BACKGROUND: Children often experience both posttraumatic stress (PTS) and depression after potentially traumatic events (PTEs). Latent class analyses (LCAs) identify subgroups with different co-occurring symptoms, but little is known about what predicts transitions between these symptom classes over time. Analyzing these transitions could reveal factors that influence the shift to classes with fewer internalizing symptoms. METHODS: Using harmoniz…
Initial Validation of a Measure Assessing DSM-5-TR and ICD-11 Prolonged Grief in Children and Adolescents
Valid and reliable instruments to assess the most recent prolonged grief disorder (PGD) criteria, as defined in the DSM-5-TR and ICD-11, are lacking. This study aimed to provide an initial validation of the Traumatic Grief Inventory—Kids—Clinician-Administered (TGI-K-CA) for assessing Prolonged Grief Disorder (PGD) symptoms in bereaved children and adolescents according to DSM-5-TR and ICD-11 criteria. Ninety bereaved Dutch children (aged 8–18 ye…
Psychometric properties of the Japanese translation of the Traumatic Grief Inventory-Self Report Plus (TGI-SR+)
Prolonged grief disorder (PGD), recently included in the ICD-11 and DSM-5-TR, can be assessed using the Traumatic Grief Inventory-Self Report Plus (TGI-SR+). This study evaluates the psychometric properties of the Japanese translation of the TGI-SR+ using a survey of Japanese adults (N = 505) who had experienced bereavement more than one year earlier. To assess the severity of prolonged grief, depression, anxiety, and posttraumatic stress, partic…
Grief, Bereavement, and Mental Health (12 works) · Clinical Psychology (10 works) · Psychology (10 works) · Grief (9 works) · Psychiatry (8 works) · Clinical Psychology (7 works) · Medicine (7 works) · Migration, Health and Trauma (6 works) · Complicated grief (5 works) · Posttraumatic Stress Disorder Research (5 works)