S.M.A. Lamers
University of Twente
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Featured researches published by S.M.A. Lamers.
Journal of Clinical Psychology | 2011
S.M.A. Lamers; Gerben Johan Westerhof; Ernst Thomas Bohlmeijer; Peter M. ten Klooster; Cory L.M. Keyes
There is a growing consensus that mental health is not merely the absence of mental illness, but it also includes the presence of positive feelings (emotional well-being) and positive functioning in individual life (psychological well-being) and community life (social well-being). We examined the structure, reliability, convergent validity, and discriminant validity of the Mental Health Continuum-Short Form (MHC-SF), a new self-report questionnaire for positive mental health assessment. We expected that the MHC-SF is reliable and valid, and that mental health and mental illness are 2 related but distinct continua. This article draws on data of the LISS panel of CentERdata, a representative panel for Longitudinal Internet Studies for the Social Sciences (N = 1,662). Results revealed high internal and moderate test-retest reliability. Confirmatory factor analysis (CFA) confirmed the 3-factor structure in emotional, psychological, and social well-being. These subscales correlated well with corresponding aspects of well-being and functioning, showing convergent validity. CFA supported the hypothesis of 2 separate yet related factors for mental health and mental illness, showing discriminant validity. Although related to mental illness, positive mental health is a distinct indicator of mental well-being that is reliably assessed with the MHC-SF.
Journal of Behavioral Medicine | 2012
S.M.A. Lamers; Linda Bolier; Gerben Johan Westerhof; Filip Smit; Ernst Thomas Bohlmeijer
This meta-analysis synthesized studies on emotional well-being as predictor of the prognosis of physical illness, while in addition evaluating the impact of putative moderators, namely constructs of well-being, health-related outcome, year of publication, follow-up time and methodological quality of the included studies. The search in reference lists and electronic databases (Medline and PsycInfo) identified 17 eligible studies examining the impact of general well-being, positive affect and life satisfaction on recovery and survival in physically ill patients. Meta-analytically combining these studies revealed a Likelihood Ratio of 1.14, indicating a small but significant effect. Higher levels of emotional well-being are beneficial for recovery and survival in physically ill patients. The findings show that emotional well-being predicts long-term prognosis of physical illness. This suggests that enhancement of emotional well-being may improve the prognosis of physical illness, which should be investigated by future research.
The Journal of Positive Psychology | 2015
S.M.A. Lamers; Gerben Johan Westerhof; Cornelis A.W. Glas; Ernst Thomas Bohlmeijer
Background: There is accumulating evidence that positive mental health and psychopathology should be seen as separate indicators of mental health. This study contributes to this evidence by investigating the bidirectional relation between positive mental health and psychopathological symptoms over time. Methods: Positive mental health (MHC-SF) and psychopathological symptoms (BSI) were longitudinally measured in a representative adult sample (N = 1932) on four measurement occasions in nine months. A cross-lagged panel design was applied and evaluated with a latent growth model combined with an item response theory measurement model. Results: Psychopathological symptoms were longitudinally related to positive mental health and vice versa, controlling for initial levels. The changes over time were even more important than the absolute levels of psychopathological symptoms and positive mental health, respectively. Conclusions: The results underline the need for a comprehensive perspective on mental health, incorporating both the treatment of symptoms and the enhancement of well-being.
Journals of Gerontology Series B-psychological Sciences and Social Sciences | 2015
S.M.A. Lamers; Ernst Thomas Bohlmeijer; J. Korte; Gerben Johan Westerhof
OBJECTIVES The study used a randomized controlled trial to investigate the short-term and long-term effects of life-review as online-guided self-help in adults (40+) with moderate depressive symptomatology. We evaluated ego-integrity and rumination as mediators and assessed whether the effects of the intervention did not differ across middle-aged and older adults. METHOD Effects of life-review (n = 58) were compared with a waiting list group (n = 58) and an expressive writing intervention (n = 58) on depressive symptoms (primary outcome), anxiety, and well-being (secondary outcomes). Mediator and moderator analyses were also applied. RESULTS Compared with the waiting list, life-review reduced depressive symptoms (d = 0.35) and enhanced emotional (d = 0.16) and psychological well-being (d = 0.27). Life-review was not more effective than expressive writing. The effects on depressive symptoms were partly related with increases in ego-integrity and decreases in rumination. The intervention is applicable for middle-aged and older adults. CONCLUSION Life-review is effective as self-help for middle-aged and older adults with moderate depressive symptomatology compared with a waiting list group. Future research should investigate whether stimulating ego-integrity and reducing rumination enhance the effects of the intervention.
Frontiers in Psychology | 2016
H.R. Trompetter; Ernst Thomas Bohlmeijer; S.M.A. Lamers; Karlein Maria Gertrudis Schreurs
The web-based delivery of psychosocial interventions is a promising treatment modality for people suffering from chronic pain, and other forms of physical and mental illness. Despite the promising findings of first studies, patients may vary in the benefits they draw from self-managing a full-blown web-based psychosocial treatment. We lack knowledge on moderators and predictors of change during web-based interventions that explain for whom web-based interventions are especially (in)effective. In this study, we primarily explored for which chronic pain patients web-based Acceptance and Commitment Therapy (ACT) was (in)effective during a large three-armed randomized controlled trial. Besides standard demographic, physical and psychosocial factors we focused on positive mental health. Data from 238 heterogeneously diagnosed chronic pain sufferers from the general Dutch population following either web-based ACT (n = 82), or one of two control conditions [web-based Expressive Writing (EW; n = 79) and Waiting List (WL; n = 77)] were analysed. ACT and EW both consisted of nine modules and lasted nine to 12 weeks. Exploratory linear regression analyses were performed using the PROCESS macro in SPSS. Pain interference at 3-month follow-up was predicted from baseline moderator (characteristics that influence the outcome of specific treatments in comparison to other treatments) and predictor (characteristics that influence outcome regardless of treatment) variables. The results showed that none of the demographic or physical characteristics moderated ACT treatment changes compared to both control conditions. The only significant moderator of change compared to both EW and WL was baseline psychological wellbeing, and pain intensity was a moderator of change compared to EW. Furthermore, higher pain interference, depression and anxiety, and also lower levels of emotional well-being predicted higher pain interference in daily life 6 months later. These results suggest that web-based self-help ACT may not be allocated to chronic pain sufferers experiencing low levels of mental resilience resources such as self-acceptance, goals in life, and environmental mastery. Other subgroups are identified that potentially need specific tailoring of (web-based) ACT. Emotional and psychological wellbeing should receive much more attention in subsequent studies on chronic pain and illness.
European Journal of Public Health | 2016
Marijke Schotanus-Dijkstra; Margreet ten Have; S.M.A. Lamers; Ron de Graaf; Ernst Thomas Bohlmeijer
Background High levels of mental well-being might protect against the onset of mental disorders but longitudinal evidence is scarce. This study examines whether flourishing mental health predicts first-incidence and recurrent mental disorders 3 years later. Data were used from 4482 representative adults participating in the second (2010-12) and third wave (2013-15) of the Netherlands Mental Health Survey and Incidence Study-2 (NEMESIS-2). Mental well-being was assessed with the Mental Health Continuum-Short Form (MHC-SF) at the second wave. The classification criteria of this instrument were used to classify participants as having flourishing mental health: high levels of both hedonic well-being (life-satisfaction, happiness) and eudaimonic well-being (social contribution, purpose in life, personal growth). DSM-IV mood, anxiety and substance use disorders were measured with the Composite International Diagnostic Interview (CIDI) 3.0 at all waves. Odds ratios of (first and recurrent) incident disorders were estimated, using logistic regression analyses adjusting for potential confounders. Flourishing reduced the risk of incident mood disorders by 28% and of anxiety disorders by 53%, but did not significantly predicted substance use disorders. A similar pattern of associations was found for either high hedonic or high eudaimonic well-being. Significant results were found for substance use disorders when life-events and social support were removed as covariates. This study underscores the rationale of promoting mental well-being as a public mental health strategy to prevent mental illness. In wealthy European nations it seems fruitful to measure and pursuit a flourishing life rather than merely high levels of hedonic well-being.
Aging & Mental Health | 2014
Ernst Thomas Bohlmeijer; Gerben Johan Westerhof; S.M.A. Lamers
Objectives: As people grow older, identity development in later life becomes a more and more relevant topic. Studying processes that hinder or promote identity development in later life is of importance. Within this broader field, there has been a growing interest in narrative foreclosure. Our goal was to develop a short, reliable and easy–to-use instrument measuring narrative foreclosure and to validate this instrument in two samples.Methods: The narrative foreclosure scale (NFS) was validated in two studies with a sample of middle-aged adults (n = 319) and a sample with older adults (n = 174). Several analyses were conducted to assess the psychometric properties, the factor-structure and incremental validity of the scale.Results: Confirmatory factor analyses generally showed an acceptable fit of the two-factor (NF-Future and NF-Past) model to the data in both samples. Both factors of the NFS demonstrated adequate to good internal consistency, with alpha coefficients ranging from .79 for NF-Past in study 2 to .88 for NF-Future in study 1. Construct validity was good as shown by moderate to large correlations to related constructs. The scale adds a unique portion of explained variance to positive mental health, thereby showing the incremental validity of the NFS.Conclusion: A reliable scale is now available that allows to study the premature hindering of identity development in older populations. The use of the NFS as a process measure in studies on the effectiveness of interventions aiming at meaning making and identity development, such as life-review therapy and narrative therapy, is also recommended.
Positive Psychology: Advances in understanding adult motivation | 2013
S.M.A. Lamers; Gerben Johan Westerhof; Ernst Thomas Bohlmeijer; Corey L. M. Keyes
This chapter addresses mental health as more than the absence of disease, also approaching it from a positive perspective as the presence of well-being across the lifespan. The study described in the chapter investigated the association of age with psychopathology and positive mental health, controlling for potential confounding effects of physical health. The study draws on data of the representative LISS panel (N = 1,506) covering the adult lifespan (ages 18–87). Positive mental health, psychopathology, and physical health were measured. Older adults experienced both lower psychopathology and lower positive mental health, which remained after controlling for positive mental health or psychopathology respectively, demographics, and physical health. Demographics and physical health were more strongly associated with psychopathology than with positive mental health. Positive mental health and psychopathology were related, but showed distinct patterns across the lifespan. This emphasizes the importance of assessing both psychopathology and positive mental health when investigating age in relation to mental health.
Tijdschrift Voor Gerontologie En Geriatrie | 2010
Gerben Johan Westerhof; S.M.A. Lamers; D.R.S.L. de Vries
SamenvattingIn dit onderzoek zijn op experimentele wijze effecten van het ophalen van autobiografische herinneringen op emotioneel welbevinden onderzocht. Respondenten tussen de 65 en 80 jaar (N=70) werden geïnstrueerd over een herinnering te schrijven aan hun leven op 15- tot 30-jarige leeftijd. Ze deden dit op een verhalende wijze over een positieve herinnering, op een verhalende wijze over een negatieve herinnering of op een interpreterende wijze over een negatieve herinnering. Tevens is onderzocht of spontane alledaagse reminiscentietypen het effect van de experimentele manipulatie op emotioneel welbevinden modereren. Het verhalend ophalen van positieve herinneringen blijkt gunstiger voor negatief affect dan het verhalend of interpreterend ophalen van negatieve herinneringen. Alledaagse reminiscentietypen spelen bij deze effecten geen modererende rol, al zijn ze wel gerelateerd aan emotioneel welbevinden. De effecten van gemanipuleerde en spontane reminiscentie staan dus grotendeels los van elkaar. Dit is een gunstige bevinding voor interventies, omdat het herbeleven van positieve herinneringen gestimuleerd kan worden, ongeacht de wijze waarop ouderen gewend zijn om over hun verleden na te denken.
Aging & Mental Health | 2017
Miriam Cabrita; S.M.A. Lamers; H.R. Trompetter; Monique Tabak; Miriam Marie Rosé Vollenbroek-Hutten
ABSTRACT Objectives: Literature suggests that positive emotions positively influence physiological parameters but their relation to functioning in the daily life of older adults living independently remains unclear. The present work aims to investigate the relation between positive emotions and functional status in daily life of older people living independently. Method: A systematic literature review was conducted using the PubMed, PsycINFO and Scopus electronic databases. Included works were peer-reviewed empirical studies that analysed the relation between positive emotions and ability to perform activities of daily living with older adults living independently. Results: After removal of duplicates, 10 out of 963 papers met the inclusion criteria. Cross-sectional studies (n = 6) provided limited evidence about a relation between positive emotions and functioning in daily life. However, longitudinal studies (n = 4) provide significant evidence for an interaction between the two factors, suggesting that time influences this interaction. Conclusion: The variety on the design and samples of the studies included in this review does not allow a cohesive conclusion of the results. Nevertheless, limited evidence suggests that higher frequency in the experience of positive emotions might be associated with lower functional limitations. The issue of causality in emotions-functioning remains unclear from the review. Further observational studies are highly recommended, supported by innovative technologies.