Wolfgang Viechtbauer
Biographic Data
| ID | 1660459 |
|---|---|
| NAME | Wolfgang Viechtbauer |
| GIVEN NAMES | Wolfgang |
| FAMILY NAME | Viechtbauer |
| SIGNATURE | VIECHTBAUER W |
| AFFILIATIONS | Maastricht University |
| ORCID | 0000-0003-3463-4063 |
| VERIFIED | Yes |
| TOTAL WORKS | 21 |
| TOTAL CITATIONS | 201 |
| AUTHOR COUNT | 21 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2005 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 2 |
What happens at night? Differentiating within-day and overnight affective inertia
Affective inertia - the degree to which affect persists over time - has, for example, been linked with neuroticism, depressive symptoms, and increased distress. The typical statistical approaches modelling affective inertia as autoregression largely ignore that assessment periods covering several days also include overnight intervals which may bias affective inertia. In this study, we thus aimed to test (1) whether affective inertia differs withi…
Momentary appraisals of uncontrollable and unpredictable events predict caregiver well-being
Family caregivers of people with dementia are at risk of chronic stress, which can adversely affect their mental well-being. Understanding how daily stressors impact caregivers is crucial for developing effective support strategies. This experience sampling study involved spousal caregivers of home-dwelling individuals with dementia. Data on caregivers' appraisals of daily events and their emotional and behavioural responses were collected over s…
Perceived disturbance and predictors thereof in studies using the experience sampling method
The Effects of Sampling Frequency and Questionnaire Length on Perceived Burden, Compliance, and Careless Responding in Experience Sampling Data in a Student Population
Currently, little is known about the association between assessment intensity, burden, data quantity, and data quality in experience sampling method (ESM) studies. Researchers therefore have insufficient information to make informed decisions about the design of their ESM study. Our aim was to investigate the effects of different sampling frequencies and questionnaire lengths on burden, compliance, and careless responding. Students ( n = 163) rec…
Affective structure, measurement invariance, and reliability across different experience sampling protocols
Theories of the generation effect and the impact of generation constraint
Experience sampling methodology in mental health research
In the mental health field, there is a growing awareness that the study of psychiatric symptoms in the context of everyday life, using experience sampling methodology (ESM), may provide a powerful and necessary addition to more conventional research approaches. ESM, a structured self‐report diary technique, allows the investigation of experiences within, and in interaction with, the real‐world context. This paper provides an overview of how zoomi…
Reported Childhood Abuse and Stress Reactivity in Psychosis
A previous study observed that reported childhood abuse moderated psychotic and emotional reactivity to stress among patients with non-affective psychotic disorder. However, that study used a type of analysis unsuited for skewed data. This study aimed (1) to replicate the study and (2) to examine whether we would obtain similar results using a statistical approach better suited to skewed data. Fifty-nine patients with non-affective psychotic diso…
Genetic and Environmental Influences on the Affective Regulation Network
Background: The study of networks of affective mental states that play a role in psychopathology may help model the influence of genetic and environmental risks. The aim of the present paper was to examine networks of affective mental states (AMS: "cheerful," "insecure," "relaxed," "anxious," "irritated," and "down") over time, stratified by genetic liability for psychopathology and exposure to environmental risk, using momentary assessment techn…
Sensitivity to Peer Evaluation and Its Genetic and Environmental Determinants
Adolescents and young adults are highly focused on peer evaluation, but little is known about sources of their differential sensitivity. We examined to what extent sensitivity to peer evaluation is influenced by interacting environmental and genetic factors. A sample of 354 healthy adolescent twin pairs (n = 708) took part in a structured, laboratory task in which they were exposed to peer evaluation. The proportion of the variance in sensitivity…
Methods to estimate the between‐study variance and its uncertainty in meta‐analysis
Meta‐analyses are typically used to estimate the overall/mean of an outcome of interest. However, inference about between‐study variability, which is typically modelled using a between‐study variance parameter, is usually an additional aim. The DerSimonian and Laird method, currently widely used by default to estimate the between‐study variance, has been long challenged. Our aim is to identify known methods for estimation of the between‐study var…
Childhood Adversities Increase the Risk of Psychosis
The efficacy and safety of a nicotine conjugate vaccine (NicVAX®) or placebo co-administered with varenicline (Champix®) for smoking cessation
ClinicalTrials.gov: (NCT00995033)
The relationship between neurocognition and social cognition with functional outcomes in schizophrenia
Outlier and influence diagnostics for meta-analysis
The presence of outliers and influential cases may affect the validity and robustness of the conclusions from a meta-analysis. While researchers generally agree that it is necessary to examine outlier and influential case diagnostics when conducting a meta-analysis, limited studies have addressed how to obtain such diagnostic measures in the context of a meta-analysis. The present paper extends standard diagnostic procedures developed for linear …
Conducting Meta-Analyses in R with the metafor Package
The metafor package provides functions for conducting meta-analyses in R . The package includes functions for fitting the meta-analytic fixed- and random-effects models and allows for the inclusion of moderators variables (study-level covariates) in these models. Meta-regression analyses with continuous and categorical moderators can be conducted in this way. Functions for the Mantel-Haenszel and Peto's one-step method for meta-analyses of 2 x 2 …
Are psychotic psychopathology and neurocognition orthogonal? A systematic review of their associations
A systematic review (58 studies, 5,009 individuals) is presented of associations between psychopathological dimensions of psychosis and measures of neurocognitive impairment in subjects with a lifetime history of nonaffective psychosis. Results showed that negative and disorganized dimensions were significantly but modestly associated with cognitive deficits (correlations from -.29 to -.12). In contrast, positive and depressive dimensions of psyc…
Effects of green tea on weight loss and weight maintenance. A meta-analysis
Personality traits change in adulthood
In a response to comments by P. T. Costa, Jr., and R. R. McCrae on the current authors' original article, the authors show that Costa and McCrae's writings on personality suggest a belief in immutability of personality traits. The authors agree with Costa and McCrae that new personality trait models that provide an accurate lower order structure of personality traits are needed and explain why the Revised NEO Personality Inventory is not the corr…
Patterns of mean-level change in personality traits across the life course
Bias and Efficiency of Meta-Analytic Variance Estimators in the Random-Effects Model
The meta-analytic random effects model assumes that the variability in effect size estimates drawn from a set of studies can be decomposed into two parts: heterogeneity due to random population effects and sampling variance. In this context, the usual goal is to estimate the central tendency and the amount of heterogeneity in the population effect sizes. The amount of heterogeneity in a set of effect sizes has implications regarding the interpret…
Patterns of mean-level change in personality traits across the life course
Personality traits change in adulthood
In a response to comments by P. T. Costa, Jr., and R. R. McCrae on the current authors' original article, the authors show that Costa and McCrae's writings on personality suggest a belief in immutability of personality traits. The authors agree with Costa and McCrae that new personality trait models that provide an accurate lower order structure of personality traits are needed and explain why the Revised NEO Personality Inventory is not the corr…
Affective structure, measurement invariance, and reliability across different experience sampling protocols
Bias and Efficiency of Meta-Analytic Variance Estimators in the Random-Effects Model
The meta-analytic random effects model assumes that the variability in effect size estimates drawn from a set of studies can be decomposed into two parts: heterogeneity due to random population effects and sampling variance. In this context, the usual goal is to estimate the central tendency and the amount of heterogeneity in the population effect sizes. The amount of heterogeneity in a set of effect sizes has implications regarding the interpret…
Personality traits change in adulthood
In a response to comments by P. T. Costa, Jr., and R. R. McCrae on the current authors' original article, the authors show that Costa and McCrae's writings on personality suggest a belief in immutability of personality traits. The authors agree with Costa and McCrae that new personality trait models that provide an accurate lower order structure of personality traits are needed and explain why the Revised NEO Personality Inventory is not the corr…
Patterns of mean-level change in personality traits across the life course
Are psychotic psychopathology and neurocognition orthogonal? A systematic review of their associations
A systematic review (58 studies, 5,009 individuals) is presented of associations between psychopathological dimensions of psychosis and measures of neurocognitive impairment in subjects with a lifetime history of nonaffective psychosis. Results showed that negative and disorganized dimensions were significantly but modestly associated with cognitive deficits (correlations from -.29 to -.12). In contrast, positive and depressive dimensions of psyc…
Effects of green tea on weight loss and weight maintenance. A meta-analysis
Outlier and influence diagnostics for meta-analysis
The presence of outliers and influential cases may affect the validity and robustness of the conclusions from a meta-analysis. While researchers generally agree that it is necessary to examine outlier and influential case diagnostics when conducting a meta-analysis, limited studies have addressed how to obtain such diagnostic measures in the context of a meta-analysis. The present paper extends standard diagnostic procedures developed for linear …
Conducting Meta-Analyses in R with the metafor Package
The metafor package provides functions for conducting meta-analyses in R . The package includes functions for fitting the meta-analytic fixed- and random-effects models and allows for the inclusion of moderators variables (study-level covariates) in these models. Meta-regression analyses with continuous and categorical moderators can be conducted in this way. Functions for the Mantel-Haenszel and Peto's one-step method for meta-analyses of 2 x 2 …
The relationship between neurocognition and social cognition with functional outcomes in schizophrenia
Childhood Adversities Increase the Risk of Psychosis
The efficacy and safety of a nicotine conjugate vaccine (NicVAX®) or placebo co-administered with varenicline (Champix®) for smoking cessation
ClinicalTrials.gov: (NCT00995033)
Methods to estimate the between‐study variance and its uncertainty in meta‐analysis
Meta‐analyses are typically used to estimate the overall/mean of an outcome of interest. However, inference about between‐study variability, which is typically modelled using a between‐study variance parameter, is usually an additional aim. The DerSimonian and Laird method, currently widely used by default to estimate the between‐study variance, has been long challenged. Our aim is to identify known methods for estimation of the between‐study var…
Experience sampling methodology in mental health research
In the mental health field, there is a growing awareness that the study of psychiatric symptoms in the context of everyday life, using experience sampling methodology (ESM), may provide a powerful and necessary addition to more conventional research approaches. ESM, a structured self‐report diary technique, allows the investigation of experiences within, and in interaction with, the real‐world context. This paper provides an overview of how zoomi…
Reported Childhood Abuse and Stress Reactivity in Psychosis
A previous study observed that reported childhood abuse moderated psychotic and emotional reactivity to stress among patients with non-affective psychotic disorder. However, that study used a type of analysis unsuited for skewed data. This study aimed (1) to replicate the study and (2) to examine whether we would obtain similar results using a statistical approach better suited to skewed data. Fifty-nine patients with non-affective psychotic diso…
Genetic and Environmental Influences on the Affective Regulation Network
Background: The study of networks of affective mental states that play a role in psychopathology may help model the influence of genetic and environmental risks. The aim of the present paper was to examine networks of affective mental states (AMS: "cheerful," "insecure," "relaxed," "anxious," "irritated," and "down") over time, stratified by genetic liability for psychopathology and exposure to environmental risk, using momentary assessment techn…
Sensitivity to Peer Evaluation and Its Genetic and Environmental Determinants
Adolescents and young adults are highly focused on peer evaluation, but little is known about sources of their differential sensitivity. We examined to what extent sensitivity to peer evaluation is influenced by interacting environmental and genetic factors. A sample of 354 healthy adolescent twin pairs (n = 708) took part in a structured, laboratory task in which they were exposed to peer evaluation. The proportion of the variance in sensitivity…
Theories of the generation effect and the impact of generation constraint
Affective structure, measurement invariance, and reliability across different experience sampling protocols
The Effects of Sampling Frequency and Questionnaire Length on Perceived Burden, Compliance, and Careless Responding in Experience Sampling Data in a Student Population
Currently, little is known about the association between assessment intensity, burden, data quantity, and data quality in experience sampling method (ESM) studies. Researchers therefore have insufficient information to make informed decisions about the design of their ESM study. Our aim was to investigate the effects of different sampling frequencies and questionnaire lengths on burden, compliance, and careless responding. Students ( n = 163) rec…
Perceived disturbance and predictors thereof in studies using the experience sampling method
What happens at night? Differentiating within-day and overnight affective inertia
Affective inertia - the degree to which affect persists over time - has, for example, been linked with neuroticism, depressive symptoms, and increased distress. The typical statistical approaches modelling affective inertia as autoregression largely ignore that assessment periods covering several days also include overnight intervals which may bias affective inertia. In this study, we thus aimed to test (1) whether affective inertia differs withi…
Momentary appraisals of uncontrollable and unpredictable events predict caregiver well-being
Family caregivers of people with dementia are at risk of chronic stress, which can adversely affect their mental well-being. Understanding how daily stressors impact caregivers is crucial for developing effective support strategies. This experience sampling study involved spousal caregivers of home-dwelling individuals with dementia. Data on caregivers' appraisals of daily events and their emotional and behavioural responses were collected over s…
Psychology (11 works) · Medicine (10 works) · Mental Health Research Topics (8 works) · Computer Science (7 works) · Experience sampling method (6 works) · Meta-analysis (6 works) · Social Psychology (6 works) · Statistics (6 works) · Clinical Psychology (5 works) · Developmental psychology (5 works)