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Tom Wilderjans

Tom Wilderjans
KU Leuven | ku leuven · Research unit for Methodology of Educational Sciences

About

78
Publications
9,737
Reads
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727
Citations
Additional affiliations
October 2012 - present
KU Leuven
Position
  • FWO post-doctoral researcher
October 2009 - September 2012
KU Leuven
Position
  • PostDoc Position

Publications

Publications (78)
Conference Paper
Interpersonal synchrony is associated with better interpersonal affiliation. No matter how well-affiliated people are, interruptions or transitions in synchrony rebound to occur. One might intuitively expect that transitions in synchrony negatively affect affiliation or liking. Empirical evidence, however, suggests that time periods with interrupti...
Article
Objective: Many individuals with an eating disorder do not receive appropriate care. Low-threshold interventions could help bridge this treatment gap. The study aim was to evaluate the effectiveness of Featback, a fully automated online self-help intervention, online expert-patient support and their combination. Method: A randomized controlled t...
Chapter
For a video presentation, see https://www.youtube.com/watch?v=PRUzrkf1mW4. When people interact, their behaviour tends to become synchronised, a mutual coordination process that fosters short-term adaptations, like increased affiliation, and long-term adaptations, like increased bonding. This paper addresses for the first time how such short-term a...
Conference Paper
For a video presentation, see https://www.youtube.com/watch?v=SRfB0Pphi34. Interpersonal synchrony usually induces behavioural adaptivity concerning the interaction between people. Such behavioural adaptivity is assumed to be driven by some form of subjective internal synchrony detection. In contrast to objective synchrony detection by an external...
Conference Paper
For a video presentation, see https://www.youtube.com/watch?v=PRUzrkf1mW4. When people interact, their behaviour tends to become synchronized, a mutual coordination process that fosters short-term adaptations, like increased affiliation, and long-term adaptations, like increased bonding. This paper addresses for the first time how such short-term a...
Article
Full-text available
The main purpose of the study was the development of the Sensory Processing Sensitivity Questionnaire (SPSQ), designed to measure Sensory Processing Sensitivity, defined as a person's sensitivity to subtle stimuli, the depth with which these stimuli are processed, and its impact on emotional reactivity. The item pool generated for the development o...
Article
Full-text available
In various scientific fields, researchers make use of partitioning methods (e.g., K -means) to disclose the structural mechanisms underlying object by variable data. In some instances, however, a grouping of objects into clusters that are allowed to overlap (i.e., assigning objects to multiple clusters) might lead to a better representation of the...
Chapter
Full-text available
People spontaneously synchronize their mental states and behavioral actions when they interact. This paper models general mechanisms that can lead to the emergence of interpersonal synchrony by multiple agents with internal cognitive and affective states. In our simulations, one agent was exposed to a repeated stimulus and the other agent started t...
Article
Full-text available
Purpose In professional learning communities (PLCs), teachers collaborate and learn with the aim of improving students' learning. The aim of this study is to gain insight into teachers' perceptions of their schools' changing toward PLCs and conditions which support or hamper this change. Design/methodology/approach Questionnaires were completed by...
Article
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Prejudice against sexual and gender minorities (e.g., LGBT people) is quite prevalent and is harmful. We examined an existing—and often-used—contact intervention in pre-existing groups in an educational setting and assessed its effectiveness in reducing different forms of LGBT negativity. We focused particularly on modern LGBT negativity: a relativ...
Article
Joint decision-making can be seen as the synchronization of actions and emotions, usually via nonverbal interaction between people while they show empathy. The aim of the current paper was (1) to develop an adaptive computational model for the type of synchrony that can occur in joint decision-making for two persons modeled as agents, and (2) to vi...
Article
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Background Antisociality across adolescence and young adulthood puts individuals at high risk of developing a variety of problems. Prior research has linked antisociality to autonomic nervous system and endocrinological functioning. However, there is large heterogeneity in antisocial behaviors, and these neurobiological measures are rarely studied...
Article
Background The current study aimed to investigate the possible interplay between self-compassion and affect during Mindfulness-Based Compassionate Living (MBCL) in recurrently depressed individuals. Methods Data was used from a subsample of a parallel-group randomized controlled trial investigating the efficacy of MBCL in recurrently depressed adu...
Article
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Recent years have seen a dramatic increase in studies measuring brain activity, physiological responses, and/or movement data from multiple individuals during social interaction. For example, so-called “hyperscanning” research has demonstrated that brain activity may become synchronized across people as a function of a range of factors. Such findin...
Article
Full-text available
Background Home practice is considered a key element in increasing treatment effectiveness of Mindfulness-Based Cognitive Therapy (MBCT) for depression. However, long-term longitudinal research into the associations between home practice and depression outcomes is scarce. The current study examined the prospective associations between the extent of...
Conference Paper
People spontaneously synchronize their activities when they interact. This paper models the emergence of interpersonal synchrony by multiple agents with internal cognitive and affective states. In our simulations, one agent was exposed to a repeated stimulus and the other agent started to synchronize consecutively its movements, affects, conscious...
Article
Full-text available
Purpose: Few studies have investigated possible predictors of positive outcomes for youths in foster care. The aim of this prospective follow-up study was to examine quality of life (QoL) among youths in foster care and to assess whether contextual and child factors predicted QoL. Methods: Online questionnaires were completed by carers in Norway...
Article
In the DSM-5 Section III Alternative Model for Personality Disorders (AMPD), the severity of personality pathology (criterion A) and the presence of pathological personality trait domains and facets (criterion B) are assessed independently. Recent studies have challenged this assumption of independence but the interplay between criterion A and crit...
Article
Full-text available
Objectives Gaining knowledge of dynamic processes of mechanisms underlying mindfulness-based cognitive therapy (MBCT) for recurrent depression could help to improve treatment efficacy. The current study examined the overall course and week-to-week associations of mindfulness and positive/negative affect during MBCT for recurrent depression.Methods...
Article
The set‐up of comprehensive studies in life sciences involving a longitudinal dimension—as appears in time‐scale metabolomics—calls for the use of dimension reduction techniques for three‐way data structures (e.g., samples by variables by time points). For this purpose, a clustering around latent variables for three‐way data approach, CLV3W , has b...
Article
Full-text available
Objective: Evidence exists that placebo effects may influence hormone secretion. However, only few studies examined placebo effects in the endocrine system, including oxytocin placebo effects. We studied whether it is possible to trigger oxytocin placebo effects using a classical conditioning paradigm. Methods: Ninety-nine females were assigned...
Article
Full-text available
Background: Cognitive behavioral therapy (CBT) is frequently used to treat depressive symptoms in people living with HIV. We developed an internet-based cognitive behavioral intervention for people with HIV and depressive symptoms, which was based on an effective self-help booklet. The Web-based intervention was previously found to be effective....
Chapter
The working relationship between patient and therapist is a core aspect of psychotherapy. In This chapter, the authors consider how the therapeutic relationship may be explained by the basic social-psychological mechanism of interpersonal synchrony, defined as the temporal coordination of patient’s and therapist’s mutual behavioral, physiological,...
Chapter
Financial problems have a large negative impact on people’s lives. It is therefore important that they engage in healthy financial behavior, for example, putting money aside in savings to cover unexpected and necessary expenses. Saving money, however, does not come easy for many people and they can need some help with it. In the present chapter, we...
Article
Full-text available
In neuroscience, clustering subjects based on brain dysfunctions is a promising avenue to subtype mental disorders as it may enhance the development of a brain-based categorization system for mental disorders that transcends and is biologically more valid than current symptom-based categorization systems. As changes in functional connectivity (FC)...
Article
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Combining different metabolomics platforms can contribute significantly to the discovery of complementary processes expressed under different conditions. However, analysing the fused data might be hampered by the difference in their quality. In metabolomics data, one often observes that measurement errors increase with increasing measurement level...
Data
Amines. The file amines.csv contains the Amine metabolite levels of the patient samples. (CSV)
Data
Patient sample information. The file NMC0913groepen.csv contains information on the patient samples. (CSV)
Data
QC corrected Lipids. The file lipids_qc.csv contains the lipid levels of the patient samples after QC correction. (CSV)
Data
SCA loadings of RAW data after mean centering or autoscaling and block scaling to equal Frobenius norm. The red markers indicate loadings of amines while the black markers are of lipid metabolites. L-Glutamine is indicated because of its high values in the raw data. To ensure that the analysis is not completely driven by one metabolite with large v...
Data
QC corrected Amine levels. The file amine_qc.csv contains the amine metabolite levels of the patient samples after QC correction. (CSV)
Data
Lipids. The file Lipids.csv contains the lipid levels of the patient samples. (CSV)
Article
Full-text available
Posterror slowing (PES) is the observation that people respond slower on trials subsequent to error commissions than on trials subsequent to correct responses. Different accounts have been proposed to explain PES. On the one hand, it has been suggested that PES arises from an adaptive increase in cognitive control following error commission, thereb...
Article
Children in foster care are often characterized by low academic outcomes which negatively impact their later lives. School engagement may be a key element to promote their academic and educational outcomes. However, little is known about the development of school engagement in foster children and longitudinal studies are lacking. The current study...
Article
In consumer studies, segmentation has been widely applied to identify consumer subsets on the basis of their preference for a set of products. From the last decade onwards, a more comprehensive evaluation of product performance has led to take into account various information such as consumer emotion assessment or hedonic measures on several aspect...
Article
In the behavioral sciences, many research questions pertain to a regression problem in that one wants to predict a criterion on the basis of a number of predictors. Although in many cases, ordinary least squares regression will suffice, sometimes the prediction problem is more challenging, for three reasons: first, multiple highly collinear predict...
Article
Objective: A cancer diagnosis during pregnancy may be considered as an emotional challenge for pregnant women and their partners. We aimed to identify women and partners at risk for high levels of distress based on their coping profile. Methods: Sixty-one pregnant women diagnosed with cancer and their partners filled out the Cognitive Emotion Re...
Article
In benchmarking studies with simulated data sets in which two or more statistical methods are compared, over and above the search of a universally winning method, one may investigate how the winning method may vary over patterns of characteristics of the data or the data-generating mechanism. Interestingly, this problem bears strong formal similari...
Article
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Non-suicidal self-injury (NSSI) is highly prevalent in adolescents. Secure attachment with family and peers can reduce vulnerability to NSSI and can optimize the outcomes of developmental challenges such as identity formation. Problems experienced in these developmental processes and contexts can increase vulnerability to NSSI. Hence, the present s...
Article
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Protein interaction in cells can be described at different levels. At a low interaction level, proteins function together in small, stable complexes and at a higher level, in sets of interacting complexes. All interaction levels are crucial for the living organism, and one of the challenges in proteomics is to measure the proteins at their differen...
Article
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MultiLevel Simultaneous Component Analysis (MLSCA) is a data-analytical technique for multivariate two-level data. MLSCA sheds light on the associations between the variables at both levels by specifying separate submodels for each level. Each submodel consists of a component model. Although MLSCA has already been successfully applied in diverse ar...
Article
To detect panel disagreement, we propose the clustering around latent variables for three-way data (CLV3W) approach which extends the clustering of variables around latent components (CLV) approach to three-way data typically obtained from a conventional sensory profiling procedure (i.e., assessors rating products on various descriptors). The CLV3W...
Article
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The objective of this work is to report the improvements obtained in the discrimination of complex aroma samples with subtle differences in odor pattern, by the use of a fast procedure suitable for the cases of measurements in the field demanding decision-making in real time using a portable electronic nose. This device consists of a sensor array w...
Article
This study aimed to investigate temperament subtypes in obese patients. Ninety-three bariatric surgery candidates and 63 obese inpatients from a psychotherapy unit answered the Behavioral Inhibition System/Behavioral Activation System Scale (BIS/BAS), the Effortful Control subscale of the Adult Temperament Questionnaire-Short Form (ATQ-EC), and que...
Article
In many research areas, the Parafac model is adopted to disclose the underlying structure of three-way three-mode data. In this model, a set of latent variables, called components, is sought that captures the complex interaction between the elements of the three modes. An important assumption of this model is that these components are the same for...
Article
Full-text available
Behavioral researchers often obtain information about the same set of entities from different sources. A main challenge in the analysis of such data is to reveal, on the one hand, the mechanisms underlying all of the data blocks under study and, on the other hand, the mechanisms underlying a single data block or a few such blocks only (i.e., common...
Article
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Mixture analysis is commonly used for clustering objects on the basis of multivariate data. When the data contain a large number of variables, regular mixture analysis may become problematic because a large number of parameters need to be estimated for each cluster. To tackle this problem, the mixtures of factor analyzers (MFA) model was proposed,...
Article
Investigating interdyad (i.e. couples of a client and their usual caregiver) differences in naturally occurring patterns of staff reactions to challenging behaviour (e.g. self-injurious, stereotyped and aggressive/destructive behaviour) of clients with severe or profound intellectual disabilities is important to optimise client-staff interactions....
Article
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The additive biclustering model for two-way two-mode object by variable data implies overlapping clusterings of both the objects and the variables together with a weight for each bicluster (i.e., a pair of an object and a variable cluster). In the data analysis, an additive biclustering model is fitted to given data by means of minimizing a least s...
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Native starch derivatization with octenyl succinic anhydride (OSA) is a chemical modification designed to enhance flavor microencapsulation performance. Hi Cap 100 and Capsul are two OSA starches derived from waxy maize base, which are especially suited for encapsulation processes. This work performs for the first time the encapsulation of vanilla...
Article
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When analyzing data, researchers are often confronted with a model selection problem (e.g., determining the number of components/factors in principal components analysis [PCA]/factor analysis or identifying the most important predictors in a regression analysis). To tackle such a problem, researchers may apply some objective procedure, like paralle...
Article
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A well-known clustering model to represent I × I × J data blocks, the J frontal slices of which consist of I × I object by object similarity matrices, is the INDCLUS model. This model implies a grouping of the I objects into a prespecified number of overlapping clusters, with each cluster having a slice-specific positive weight. An INDCLUS model is...
Article
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In many research domains different pieces of information are collected regarding the same set of objects. Each piece of information constitutes a data block, and all these (coupled) blocks have the object mode in common. When analyzing such data, an important aim is to obtain an overall picture of the structure underlying the whole set of coupled d...
Article
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To reveal the structure underlying two-way two-mode object by variable data, Mirkin (1987) has proposed an additive overlapping clustering model. This model implies an overlapping clustering of the objects and a reconstruction of the data, with the reconstructed variable profile of an object being a summation of the variable profiles of the cluster...
Article
Full-text available
In many areas of the behavioral sciences, different groups of objects are measured on the same set of binary variables, resulting in coupled binary object × variable data blocks. Take, as an example, success/failure scores for different samples of testees, with each sample belonging to a different country, regarding a set of test items. When dealin...