Jannis T. Kraiss

Jannis T. Kraiss
University of Twente | UT · Department of Psychology, Health and Technology (PHT)

PhD
Assistant Professor

About

19
Publications
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288
Citations

Publications

Publications (19)
Article
Full-text available
Objectives Previous studies have indicated that a sizeable proportion of patients with inflammatory arthritis present with features characteristic of central pain sensitization. However, this has not yet been examined in patients with gout. The objective of this study was to explore the presence of generalized pain hypersensitivity and associated f...
Article
Full-text available
There is a gap of knowledge about the extent to which gratitude is indeed the working mechanism of change in gratitude interventions aiming to promote mental well-being. This study explores the mediational role of gratitude as mood in the context of a recently conducted randomized controlled trial on the effects of a 6-week gratitude intervention o...
Article
Full-text available
The dual continua model assumes that psychological distress and mental well-being are two related, yet distinct dimensions of mental health. Previous studies did convincingly show the distinctiveness of these two dimensions using mainly cross-sectional research. Despite the importance to distinguish between-and within-person associations in psychol...
Article
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The last decades experienced a rapid growth in the number of studies examining the effects of psychological interventions on well-being, yet well-being is often conceptualized and measured in different ways in these studies. Previous meta-analyses included studies with a plethora of different well-being instruments, which provides an ambiguous pict...
Article
Full-text available
Background Depression is one of the leading causes of illness and disability among young people. In the Netherlands, one in twelve Dutch adolescents has experienced depression in the last 12 months. Pre-vocational students are at higher risk for elevated depressive symptoms. Effective interventions, especially for this risk group, are therefore nee...
Article
Full-text available
Background In the Netherlands, more than half of the teachers working in primary education experience high levels of work stress. Compared to other professions, teachers are more likely to drop out from work and develop mental illnesses. Almost one in five even choose a new profession within 5 years after starting as a teacher. This indicates an ur...
Thesis
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The overall goal of this dissertation is to contribute to the integration of positive psychology and personal recovery into the treatment of bipolar disorder (BD). First, an overview of the research field of positive psychology interventions for serious mental illness (SMI) and of economic studies for BD is provided. This aims to summarize the curr...
Article
Full-text available
Background. Personal recovery is increasingly recognized as important outcome for people with bipolar disorder (BD), but research addressing associated factors of personal recovery in this group remains scarce. This study aimed to explore the association of sociodemographic variables, social participation, psychopathology, and positive emotion regu...
Article
Full-text available
The aim of the current study was to evaluate the impact of a 6-week gratitude intervention for people with low to moderate well-being and moderate symptomatology of depression and anxiety up to 6 months follow-up. 217 Dutch adults were randomly assigned to one of three conditions: a 6-week gratitude intervention, a 6-week self-kindness intervention...
Article
Full-text available
There is a growing number of studies evaluating the impact of positive psychology interventions (PPI’s) in people with severe mental illnesses (SMI). The results of these studies have not been quantitatively reviewed yet. In this study, we conduct a meta-analysis on the effects of PPI’s on mental health in people with SMI across studies. Sixteen st...
Article
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Background: Bipolar disorder (BD) is associated with substantial societal burden. Therefore, economic studies in BD became increasingly important. The goal of the current study is three-fold: (1) summarize the evidence regarding economic evaluations (EEs) of non-pharmacological interventions for BD, (2) summarize cost-of-illness studies (COIs) for...
Article
Full-text available
Background: The importance of both specific emotion regulation strategies and overall deficits in emotion regulation in the context of psychopathology is widely recognized. Besides alleviating psychological symptoms, improving mental well-being is increasingly considered important in treatment of people with mental disorders. However, no comprehens...
Article
Full-text available
Objectives: To evaluate the psychometric properties of the Responses to Positive Affect (RPA) questionnaire in a sample of persons with bipolar disorder (BD). Method: Cross-sectional survey study with 107 persons with BD. The original 3-factor model of the RPA was compared with a 2-factor model. Construct validity was determined with measures of...
Article
Full-text available
The relevance of personal recovery receives increasing attention in mental health care and is also important for people with bipolar disorder (BD). There is a need for reliable and valid instruments measuring personal recovery. Therefore, the current study evaluated the psychometric properties of a Dutch translation of the Questionnaire about the P...
Article
Full-text available
Background: Bipolar disorder (BD) is characterized by recurrent (hypo)manic and depressive episodes, alternating with euthymic states in which patients are relatively symptom free. Besides clinical recovery, it is important to also strive for improvement of mental well-being and personal recovery. One prominent field focussing on the improvement of...
Article
Full-text available
Background Although positive psychology interventions (PPIs) show beneficial effects on mental health in non-clinical populations, the current literature is inconclusive regarding its effectiveness in clinical settings. We aimed to examine the effects of PPIs on well-being (primary outcome), depression, anxiety, and stress (secondary outcomes) in c...

Projects

Projects (2)
Project
The goal of this project is to explore predictors of treatment outcome in patients with mental disorders after they have started seeking treatment at a mental health care organization in the Netherlands. The data has been collected in the context of routine outcome monitoring (ROM) within a naturalistic treatment setting. Baseline data of 1,357 patients will be used to predict relevant improvement at 1-year follow-up. Relevant improvement is defined as an improvement of half a standard deviation on the symptomatic distress scale of the Outcome Questionnaire 45 (OQ-45). Potential baseline predictors include an array of sociodemographic, clinical, and psychological variables. The data will be split into a training and holdout sample and the performance of a range of different machine learning algorithms will be compared. The best performing model will then be used to predict treatment outcome in the holdout sample.
Project
The goal of this study is to investigate the (cost)-effectiveness of a multicomponent positive psychology intervention as an adjunct to care as usual offered to patients with bipolar disorder. Outcomes include measures of mental well-being, personal recovery, psychopathology and relapse. Furthermore, possible working mechanisms for the intervention are explored, including positive emotions, positive emotion regulation, self-compassion and positive relationships.