Wai Chen

• The University of Western Australia

Important associations between emotional dysregulation (ED) and ADHD have been identified in adults, with a key manifestation of this being differential use of emotion regulation strategies: reduced use of cognitive reappraisal (CR), but elevated expressive suppression (ES). These associations have been observed at both behavioral and neuroimaging...

Personality pathology is associated with emotional problems that are potentially attributable to problematic emotion regulation strategy patterns. We evaluated the emotion regulation strategies associated with the pathological personality traits in the Alternative Model of Personality Disorders (AMPD). A total of 504 participants completed measures...

Background: Self-harm (SH) refers to self-injury or intentional self-poisoning with varying degrees of suicidal intent and is a major public health issue for children and adolescents (C&A) worldwide. Given significant gaps exist in our understanding of the associated psychopathology in C&A, this paper outlines the protocol for a prospective clinica...

We lack knowledge about the short-term predictors of suicide attempts (SAs) among treatment-seeking individuals. The current study evaluated whether (a) interpersonal difficulties, hopelessness, and affective states are associated with an increased risk of SAs on the same and the next day; (b) these daily states are interconnected differently over...

Background Perinatal maternal depression may affect fetal neurodevelopment directly or indirectly via exposures such as smoking, alcohol, or antidepressant use. The relative contribution of these risk factors on child executive function (EF) has not been explored systematically. Methods A prospective pregnancy cohort of 197 women and their childre...

Introduction The demand for adolescent mental health services has increased significantly in recent years, leading to excessive wait times for adolescents seeking mental health services and poor mental health outcomes. Timely access to mental health services is critical to reducing the risk of symptom chronicity and progression to mental disorder....

This study explored how theory-driven risk and protective factors influenced probability of suicide attempts from day-to-day. A sample of patients who attempted suicide during their stay at a psychiatric hospital completed questionnaires daily, with dynamic modelling used to identify concurrent and time-lagged predictors. Network modelling was used...

Current ICD-11 descriptions for attention deficit hyperactivity disorder (ADHD) were recently published online, in the same year as the DSM-5-TR (text revised edition) was released. In this commentary, we compare and contrast the DSM-5/DSM-5-TR and ICD-11 diagnostic criteria, summarize important differences, and underscore their clinical and resear...

Objective: Nonsuicidal self-injury (NSSI) is a major public health issue. Despite increased research efforts in clinical samples, we still have little understanding of the short-term correlates, predictors, and targets of NSSI among treatment-seeking individuals. The present study was designed to (a) evaluate how suicidal thoughts, interpersonal di...

Background: Alexithymia is a trait characterized by difficulties identifying feelings, difficulties describing feelings, and externally orientated thinking. It is widely regarded as an important transdiagnostic risk factor for a range of psychopathologies, including depressive and anxiety disorders. Whilst several well-validated psychometric measur...

The Perth Alexithymia Questionnaire-Short Form (PAQ-S) is a 6-item self-report measure of alexithymia (i.e., difficulties identifying one's own feelings, difficulties describing one's own feelings, and externally oriented thinking). It was designed to provide a brief and robust alexithymia assessment tool for quick administration in research and cl...

Objective: Non-suicidal self-injury (NSSI) is a major public health issue. Despite increased research efforts in clinical samples, we still have little understanding of the short-term correlates, predictors, and targets of NSSI among treatment-seeking individuals. The current study was designed to (a) evaluate how suicidal thoughts, interpersonal d...

The network theory of mental disorders conceptualizes psychiatric symptoms as networks of symptoms that causally interact with each other. Our present study aimed to explore the symptomatic structure in children with attention-deficit/hyperactivity disorder (ADHD) using network analyses. Symptom network based on 18 items of ADHD Rating Scale-IV was...

Background The trait-impulsivity hypothesis posits impulsivity as the underlying substrate of Attention-deficit/hyperactivity disorder (ADHD) and Oppositional defiant disorder (ODD) symptom expressions. The current study applied network analysis to evaluate the inter-relationships of dimensions within ADHD (inattention and hyperactivity/impulsivity...

This brief report describes the case of a 16-year-old girl who was commenced on sertraline for anxiety and depression, and subsequently developed severe and debilitating motor tics. Cessation of sertraline was associated with the resolution of tics; after this, paroxetine was trialled and well tolerated with good response of targeted symptoms and w...

Individuals with Prader-Willi syndrome (PWS) often have excessive daytime sleepiness and emotional/behavioral disturbances. The objective of this study was to examine whether daytime sleepiness was associated with these emotional/behavioral problems, independent of nighttime sleep-disordered breathing, or the duration of sleep. Caregivers of indivi...

Background Current DSM and ICD classifications of Attention-Deficit/Hyperactivity Disorder (ADHD) exclude emotional dysregulation (ED) in their diagnostic criteria, despite ED symptoms frequently co-occurring in ADHD and likely sharing common neurobiological substrates. In this study, we examined whether consideration of ED symptoms could delineate...

Background The impact of COVID‐19 (SARS‐CoV‐2) pandemic school lockdowns on the mental health problems and feelings of loneliness of adolescents with neurodevelopmental disorders (NDDs) is hypothesized to be greater than that of their non‐NDD peers. This two and a half year longitudinal study compared changes in the mental health and loneliness of...

The study used regularized partial correlation network analysis (EBICglasso) to examine the structure of DSM-5 internet gaming disorder (IGD) symptoms (network 1); and the associations of the IGD symptoms in the network with different types of motivation as defined in the self-determination theory i.e., intrinsic motivation (engaging in an activity...

Prader‐Willi Syndrome (PWS) is a rare genetic disorder associated with emotional/behavioral disturbances. These difficulties are well documented in the literature, but the positive attributes of these individuals are not described. Taking a strengths‐based approach, the aim of this study was to describe the emotional/behavioral strengths and diffic...

Background Ever since alexithymia was defined in the 1970s, robust associations have been observed between alexithymia and a variety of symptoms of psychopathology. Alexithymia is now widely regarded as an important transdiagnostic risk factor, and it is frequently assessed in clinical and research settings. However, despite this strong interest, i...

Paper presented at the 2021 Conference on Transdiagnostic Approaches, 24th September, Manchester, United Kingdom (Online). Background: Ever since alexithymia was defined in the 1970s, robust associations have been observed between alexithymia and a variety of symptoms of psychopathology. Alexithymia is now widely regarded as an important transdiag...

Tools to assess worry among adolescents exist but do not capture the content of worries. This study reports on the development of a brief, psychometrically sound measure of worry for use with adolescents. Phase 1 involved identification of 27 potential items from existing instruments as well as item generation identified in interviews with students...

Attention Deficit/hyperactivity disorder (ADHD) is conceptualized differently in the Diagnostic and Statistical Manual (DSM-5), the International Classification of Diseases-10 (ICD-10), and the Hierarchical Taxonomy of Psychopathology (HiTOP) frameworks. This study applied independent cluster confirmatory factor analysis (ICM-CFA), exploratory stru...

BACKGROUND Maternal depression during the perinatal period predicts adverse developmental outcomes for children, via poorly understood mechanisms. One plausible pathway may involve child executive function, a suite of cognitive capacities associated with poorer social, emotional and educational outcomes. Systematic review and meta-analysis are appl...

Objectives Lurasidone is a new second generation (atypical) antipsychotic agent with unique receptor affinity and side-effect profiles, but limited literature is available on its use in adolescent populations. Contrasting with research treatment trials which typically recruit patients by stringent selection criteria, this case series examined the e...

Objectives Attention deficit hyperactivity disorder (ADHD) is an inheritable neurodevelopmental condition, often coexisting with other psychiatric conditions and learning difficulties. This exploratory qualitative investigation sought to explore and advance knowledge on mental health recovery–oriented principles and practices for young people and t...

Aims Attention‐deficit/hyperactivity disorder (ADHD) is a neuropsychiatric disorder of substantial heritability, yet emerging evidence suggests that key risk variants might reside in the noncoding regions of the genome. Our study explored the association of lncRNAs (long noncoding RNAs) with ADHD as represented at three different phenotypic levels...

Background: Difficulties in emotion regulation are a key risk factor for affective disorders. The Emotion Regulation Questionnaire (ERQ) is a 10-item measure of two emotion regulation strategies, cognitive reappraisal and expressive suppression. It is widely used tool in the United States, however, most psychometric studies of the ERQ have so far b...

Child neuropsychiatry encompasses childhood and adolescent psychiatric syndromes of neurobiological origins. It is an evolving discipline without consensus on its exact boundary. Given the inconsistencies, this chapter provides a historical perspective through which different conceptualizations of child neuropsychiatry can be understood and reconci...

Oxford Textbook of Neuropsychiatry helps to bridge the gap between general psychiatric textbooks and reference texts in neuropsychiatry. Organised into four sections, the book covers the basic knowledge and skills relevant to neuropsychiatry, the various neuropsychiatric conditions, the principles of treatment, and perspectives for neuropsychiatry...

Alexithymia is a trait involving difficulty identifying feelings, difficulty describing feelings, and externally orientated thinking. Over the past two decades, it has usually been assessed using the 20-item Toronto Alexithymia Scale (TAS-20). Recently, the Perth Alexithymia Questionnaire (PAQ) was developed to provide more detailed facet-level (an...

Abstract Background: Childhood anxiety disorders (CAD) are likely to be predicated by risk factors and pathways early in life. Identifying these factors is important to the future development of intervention targets to reduce the risk of developing CAD. Methods: Data were obtained from 198 women and children from the Mercy Pregnancy and Emotional...

Background Children and adolescents with intellectual disability are at risk of developing psychiatric symptoms and disorders; yet, the estimates reported in the literature have been inconsistent, presenting a potential barrier for service planning and delivery. Sources of variability could arise from differences in measurement instruments as well...

Objective: There is ongoing uncertainty about the structure and definition of alexithymia. Conceptually, alexithymia has traditionally been defined as a multidimensional trait with four components: difficulty identifying feelings , difficulty describing feelings , externally orientated thinking , and difficulty fantasizing . However, some authors s...

The ERQ-F (Preece et al., 2020) is a 6-item self-report measure of the extent to which people habitually use daydreaming or fantasizing as a strategy to regulate their emotions. It is based on the same instruction/item format as Gross and John’s (2003) widely used Emotion Regulation Questionnaire (a measure of two other emotion regulation strategie...

Background Consistent research findings indicate that parents and teachers observe genuinely different Attention Deficit/ Hyperactivity Disorder (ADHD) behaviours in their respective settings. Objective To evaluate the utility of information provided by teacher informant assessments (INFAs) of ADHD symptoms, and the implications of aggregation algo...

Children with attention‐deficit and hyperactivity disorder (ADHD) are more likely to experience peer problems compared to their non‐ADHD peers, though ADHD‐specific symptoms only partially explain this association. This study examined whether sleep difficulties and motor coordination problems are additional predictors of peer problems in an ADHD po...

Aims: Up to 50% of children with attention deficit hyperactivity disorder (ADHD) also present with difficulties with motor proficiency. Several assessments of motor proficiency are available for occupational therapists, though the validity of these measures in an ADHD population requires further exploration. The aim of this paper was to evaluate t...

Objective: The behavioral phenotype of neurogenetic disorders associated with intellectual disability often includes psychiatric comorbidity. The objectives of this systematic review and meta-analysis were to systematically review the prevalence of psychiatric disorders and symptoms in children and adolescents with these disorders and compare phen...

Background: Genes related to cell adhesion pathway have been implicated in the genetic architecture of attention-deficit/hyperactivity disorder (ADHD). Cell adhesion molecule 1, encoded by CADM1 gene, is a protein which facilitates cell adhesion, highly expressed in the human prefrontal lobe. This study aimed to evaluate the association of CADM1 ge...

Objective: To examine the factor structure of the Sleep Disorder Scale for Children (SDSC) in children and adolescents with ADHD. Method: The caregivers of 307 children with ADHD completed the SDSC. Standard and bifactor confirmatory factor analysis (CFA) evaluated the goodness-of-fit of competing factor structures. Results: The original and unidim...

Objectives: Retrospective recall of dissociative symptoms has been found to mediate the association between childhood abuse and deliberate self-harm (DSH) in later life. To disentangle the effect of recall bias, we tested whether dissociation symptoms ascertained during an acute DSH presentation mediates this link. Method: All participants with...

Attention-deficit hyperactivity disorder (ADHD) is frequently associated with language impairment, autism spectrum disorder (ASD) symptoms and higher-order language deficit (HOLD); yet, their complex relationship is poorly understood. HOLD encompasses deficits in using language for reasoning, problem-solving, causal and critical thinking. This stud...

Objective: This study evaluated the concurrent validity of emotional lability (EL) in children with ADHD. Method: A total of 2,015 children with ADHD and 745 typically developed controls (TDCs) were assessed and compared on EL. Results: ADHD participants expressed higher EL scores than TDCs, not influenced by gender or IQ. Higher levels of EL sympt...

Children/adolescents with attention-deficit/hyperactivity disorder (ADHD) may have a poor or inadequate response to psychostimulants or be unable to tolerate their side-effects; furthermore, stimulants may be inappropriate because of co-existing conditions. Only one non-stimulant ADHD pharmacotherapy, the noradrenaline transporter inhibitor atomoxe...

Background: The goal of this study was to investigate the occurrence, severity and clinical correlates of emotional lability (EL) in children with attention deficit/hyperactivity disorder (ADHD), and to examine factors contributing to EL and familiality of EL in youth with ADHD. Methods: One thousand, one hundred and eighty-six children with ADHD c...

The article to which this erratum refers was published in Am J Med Genet Part B (2008) 147B: 1306-1309. (c) 2008 Wiley-Liss, Inc.

Background: Mothers' positive emotions expressed about their children with attention deficit/hyperactivity disorder (ADHD) are associated with a reduced likelihood of comorbid conduct problems (CP). We examined whether this association with CP, and one with emotional problems (EMO), is moderated by variants within three genes, previously reported t...

Multiple studies have reported an association between attention deficit hyperactivity disorder (ADHD) and the 10-repeat allele of a variable number tandem repeat (VNTR) polymorphism in the 3'-untranslated region (3'UTR) of the dopamine transporter gene (DAT1). Yet, recent meta-analyses of available data find little or no evidence for this associati...

Replication is a key to resolving whether a reported genetic association represents a false positive finding or an actual genetic risk factor. In a previous study screening 51 candidate genes for association with ADHD in a multi-centre European sample (the IMAGE project), two single nucleotide polymorphisms (SNPs) within the norepinephrine transpor...

(235) PMID:18668530 ABSTRACT: Multiple studies have reported an association between attention deficit hyperactivity disorder (ADHD) and the 10-repeat allele of a variable number tandem repeat (VNTR) polymorphism in the 3'-untranslated region (3'UTR) of the dopamine transporter gene (DAT1). Yet, recent meta-analyses of available data find little or...

Previous studies have found heterogeneous association between DAT1-3'-UTR-VNTR and attention deficit hyperactivity disorder (ADHD). Various proportions of conduct disorder (CD) comorbidity in their ADHD samples may partially explain the observational discrepancies. Evidence for this comes from family and twin studies which found ADHD probands with...

Several independent studies have reported association between serotonin transporter gene (SLC6A4) polymorphisms and attention deficit hyperactivity disorder (ADHD). Five studies found evidence for association between the long-allele of a 44-bp insertion/deletion polymorphism (5-HTTLPR) and ADHD. Another two studies corroborated this finding while a...

As part of the International Multi-centre ADHD Genetics project we completed an affected sibling pair study of 142 narrowly defined Diagnostic and Statistical Manual of Mental Disorders, fourth edition combined type attention deficit hyperactivity disorder (ADHD) proband-sibling pairs. No linkage was observed on the most established ADHD-linked gen...

Background Limited success has been achieved through previous attention-deficit/hyperactivity disorder (ADHD) linkage scans, which were all designed to map genes underlying the dichotomous phenotype. The International Multi-centre ADHD Genetics (IMAGE) project performed a whole genome linkage scan specifically designed to map ADHD quantitative trai...

Common disorders of childhood and adolescence are attention-deficit/hyperactivity disorder (ADHD), oppositional defiant disorder (ODD) and conduct disorder (CD). For one to two cases in three diagnosed with ADHD the disorders may be comorbid. However, whether comorbid conduct problems (CP) represents a separate disorder or a severe form of ADHD rem...

Season of birth (SOB) has been associated with attention deficit hyperactivity disorder (ADHD) in two existing studies. One further study reported an interaction between SOB and genotypes of the dopamine D4 receptor (DRD4) gene. It is important that these findings are further investigated to confirm or refute the findings. In this study, we investi...

Season of birth (SOB) has been associated with attention deficit hyperactivity disorder (ADHD) in two existing studies. One further study reported an interaction between SOB and genotypes of the dopamine D4 receptor (DRD4) gene. It is important that these findings are further investigated to confirm or refute the findings. In this study, we investi...

Attention deficit hyperactivity disorder (ADHD) is a discrete clinical syndrome characterized by the triad of inattention, hyperactivity, and impulsivity in the context of marked impairments. Molecular genetic studies have been successful in identifying genetic variants associated with ADHD, particularly with DSM-IV inattentive and combined subtype...

Attention deficit hyperactivity disorder (ADHD) is a complex condition with environmental and genetic etiologies. Up to this point, research has identified genetic associations with candidate genes from known biological pathways. In order to identify novel ADHD susceptibility genes, 600,000 SNPs were genotyped in 958 ADHD proband-parent trios. Afte...

Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder, starting in early childhood and persisting into adulthood in the majority of cases. Family and twin studies have demonstrated the importance of genetic factors and candidate gene association studies have identified several loci that exert small but significant...

Introduction: Sub-threshold autistic symptoms and their relationship with oppositional symptoms are examined in an ADHD sibling pair sample. Methods: 1047 sibling pairs (1047 ADHD cases diagnosed using PACS and 1356 unselected siblings) had ADHD and oppositional symptoms assessed using Connors’ Rating Scales and autistic symptoms measured by Social...

Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder, starting in early childhood and persisting into adulthood in the majority of cases. Family and twin studies have demonstrated the importance of genetic factors and candidate gene association studies have identified several loci that exert small but significant...

Monozygous (MZ) twins are often described as being physically and genetically identical. Clinical determination of zygosity relies on the assumption that any physical differences between a pair of twins imply they are dizygous. Most twin research relies on the assumption that dizygous twins share approximately 50% of the same genes, whereas monozyg...

No previous studies have used morphological neuroimaging to compare children with ADHD with siblings of children with ADHD. To test the hypothesis that the total size of the corpus callosum is altered in children with hyperkinetic disorder, the corpus callosum was outlined from a single midline proton-density weighted slice (containing the septum p...

Childhood autism is characterised by impairments in communication and reciprocal social interaction together with restricted/stereotyped interests, which are evident before 3 years of age. Specific developmental disorders of speech and language (SDDSL) are characterised by impairment in the development of expressive and/or receptive language skills...