Publications by authors named "Kieron O'Connor"

Objectives: To examine how change in benzodiazepine (BZD) use is linked to changes in depressive symptoms intensity, worry intensity, and sleep quality over 16 months.

Method: Data come from a larger randomised controlled trial (RCT) named the 'Programme d'Aide du Succès au SEvrage (PASSE-60+)' study (NCT02281175). Seventy-three participants age 60 years and older took part in a 4-month discontinuation programme and were assessed four times over 16 months.

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(1) : Gilles de la Tourette Syndrome (TS) is a neurodevelopmental disorder characterized by motor and vocal tics. Attention deficit and hyperactivity disorder (ADHD) is a common comorbidity of TS that adds further impairment. Cognitive-behavioural therapy (CBT) has shown efficacy in treating tics, yet its effectiveness in individuals with TS and comorbid ADHD remains unclear.

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Article Synopsis
  • Tourette Syndrome (TS), Obsessive Compulsive Disorder (OCD), and Body-Focused Repetitive Behaviors (BFRB) have overlapping features but have not been extensively compared in research.
  • A study using Event-Related Potentials (ERPs) aimed to identify when and where brain activity differs among these disorders while involving participants with TS, OCD, BFRB, and a control group.
  • The results indicated that both TS and OCD showed reduced P300 responses, suggesting shared cognitive deficits, but distinct brain activation patterns were found, particularly in the OCD group.
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: Tourette syndrome (TS) and Chronic Tic Disorder (CT) are neurodevelopmental conditions involving motor and/or phonic tics. Youth with tics may encounter feelings of isolation, diminished self-esteem and quality of life, and academic difficulties. A growing body of scientific literature suggests sex differences in youth with tics, but findings have been mixed so far.

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Introduction: Inference-based cognitive-behavioral therapy (I-CBT) is a specialized psychological treatment for obsessive-compulsive disorder (OCD) without deliberate and prolonged exposure and response prevention (ERP) that focuses on strengthening reality-based reasoning and correcting the dysfunctional reasoning giving rise to erroneous obsessional doubts and ideas.

Objective: The present study aimed to evaluate the effectiveness of I-CBT through a comparison with appraisal-based cognitive behavioral therapy (A-CBT) and an adapted mindfulness-based stress reduction (MBSR) intervention.

Methods: This was a two-site, parallel-arm randomized controlled trial (RCT) comparing I-CBT with A-CBT.

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Background: Tourette syndrome (TS) can be accompanied by neurocognitive impairment. Only a few studies have focused on executive function assessment in TS using design fluency, providing preliminary results. This study aimed to characterize the detailed design fluency profile of children with TS compared with neurotypical children, while addressing the central concern of frequent comorbidities in studies on TS by considering tic severity and attention-deficit/hyperactivity disorder (ADHD) symptoms and diagnosis.

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Background And Objectives: Inferential confusion (IC) entails confusing an imagined possibility with a sensory-based possibility, and acting upon the imagined possibility as if it was real. Although IC was formulated in the context of obsessive-compulsive disorder (OCD), this reasoning bias has shown to be relevant to other obsessive-compulsive spectrum disorders, such as eating disorders (EDs). The goal of this study was to induce IC experimentally in individuals with EDs relative to healthy controls (HC).

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Article Synopsis
  • The study examines the relationship between intrusions and obsessions in individuals with obsessive-compulsive disorder (OCD), focusing on their contexts of occurrence.
  • A total of 68 OCD patients described their most distressing intrusion and obsession, revealing that both were connected to negative emotions and specific life events when they first appeared.
  • Findings indicate that the contexts for intrusions and obsessions change over time, suggesting a continuum where intrusions can develop into obsessions based on their contextual links.
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Obsessive-compulsive disorder (OCD) patients are known to have various functional abnormalities in prefrontal and motor areas. Given the presence of compulsions in many OCD patients, impaired response preparation processes could be a core feature of OCD. Yet, these processes remain understudied from a neurophysiological standpoint.

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Background: Study-level meta-analyses have demonstrated the efficacy of cognitive-behavioural therapy for psychosis (CBTp). Limitations of conventional meta-analysis may be addressed using individual-participant-data (IPD). We aimed to determine a) whether results from IPD were consistent with study-level meta-analyses and b) whether demographic and clinical characteristics moderate treatment outcome.

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Background: The Research Domain Criteria seeks to bridge knowledge from neuroscience with clinical practice by promoting research into valid neurocognitive phenotypes and dimensions, irrespective of symptoms and diagnoses as currently conceptualized. While the Research Domain Criteria offers a vision of future research and practice, its 39 functional constructs need refinement to better target new phenotyping efforts. This study aimed to determine which Research Domain Criteria constructs are most relevant to understanding obsessive-compulsive and related disorders, based on a consensus between experts in the field of obsessive-compulsive and related disorders.

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Clinical management of hoarding disorder is challenging because of the weak insight of people with hoarding disorder, the lack of available tools for disease management in the health care system, and the absence of communication between health care and primary responders. To tackle this communication gap and, hence, improve clinical management of hoarding disorder, a community partnership initiated by people with hoarding disorder took place in Montreal. This initiative could profitably offer guidelines for other communities facing hoarding disorder challenges.

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The purposes of this research were (1) to analyse the psychometric properties of the Inferential Confusion Questionnaire-Expanded Version (ICQ-EV) in a Spanish population; (2) to explore the role of inferential confusion in obsessive-compulsive disorder (OCD); and (3) to compare the inferential confusion construct in nonclinical and clinical samples. A sample of 342 nonclinical participants and 66 patients with OCD completed the ICQ-EV Spanish adaptation as well as a set of questionnaires. Results confirmed a good fit of the ICQ-EV Spanish version to the original unifactorial structure and excellent internal consistency and test-retest reliability.

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Background: Long-term benzodiazepine (BZD) use among seniors is mostly inappropriate and associated with adverse health outcomes. To prevent these consequences, withdrawal is crucial, yet knowledge is limited about what predicts BZD discontinuation. Until now, most studies have focused on sociodemographic and BZD intake factors as predictors while neglecting psychological factors.

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While the Diagnostic and Statistical Manual Version 5 (DSM-5) has separated obsessive-compulsive disorder (OCD) from other anxiety disorders, conceptualization and treatment of OCD is still identical to the conceptualization and treatment of phobias. Many differences exist between phobias and OCD justifying a different conceptualization and treatment modality for OCD. Implications of the phobic model for OCD are discussed and its limitations are shown.

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Auditory verbal hallucinations are hallmark symptoms of schizophrenia and are amongst the most disturbing symptoms of the disorder. Although not entirely understood, the relationship between the voice hearer and their voices has been shown to be an important treatment target. Understanding voice hearers' standpoints through qualitative analysis is central to apprehend a deeper comprehension of their experience and further explore the relevance of interpersonal interventions.

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Cognitive-behavioral therapy (CBT) constitutes an empirically based treatment for tic disorders (TD), but much remains to be learned about its impact at the neural level. Therefore, we examined the electrophysiological correlates of CBT in TD patients, and we evaluated the utility of event-related potentials (ERP) as predictors of CBT outcome. ERPs were recorded during a stimulus-response compatibility (SRC) task in 26 TD patients and 26 healthy controls.

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Previous meta-analysis has reported the rate of reliable and clinically significant changes in hoarding disorder (HD) after cognitive-behavioural therapy (CBT) based on the classical CBT model of HD, as between 42% and 25%. However, in this analysis, different types of therapy (group vs individual, G-CBT and I-CBT, respectively), different providers (psychologist vs nonpsychologist), and different diagnosis (HD vs hoarding behaviour) were analysed together. Hence, it remains unclear if reported rate of changes was due to limits of the CBT model of HD or due to the fact that different applications of the model were analysed together.

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Article Synopsis
  • - Cognitive confidence relates to how sure individuals feel about their cognitive abilities, and it's shown to be significant in the context of eating disorders (EDs) like bulimia nervosa (BN).
  • - A study compared women with BN to healthy controls and found that while their perceptual confidence was similar at first, those with BN experienced a significant drop in confidence after body checking.
  • - This decrease in confidence is reminiscent of the effects seen in obsessive-compulsive disorder (OCD), suggesting that body checking could negatively impact how individuals with BN perceive their own appearance.
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Background: Group cognitive-behavioural therapy (G-CBT) for hoarding disorder (HD) may be an intervention of choice, considering its efficacy, low costs, and impact on comorbid anxiety and depression. But although G-CBT and modifications of G-CBT have been applied, none has assessed G-CBT efficacy at follow-up. In the current open-label pilot study, we tested the efficacy of G-CBT at posttreatment and 6-month follow-up and whether the inclusion of targeted reasoning and self-identity components added to G-CBT efficacy.

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Schizophrenia is a chronic and severe mental illness that poses significant challenges. While many pharmacological and psychosocial interventions are available, many treatment-resistant schizophrenia patients continue to suffer from persistent psychotic symptoms, notably auditory verbal hallucinations (AVH), which are highly disabling. This unmet clinical need requires new innovative treatment options.

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Hoarding disorder (HD) places an important burden on people with HD, on their family members and society. In this paper we evaluate help-seeking in HD at primary mental health, measured in referral rate, together with its individual, environmental and structural correlates. We conducted an aggregate study by combining existing official data with our own survey data at the catchment area level.

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Background And Objectives: Previous studies show that individuals with obsessive compulsive disorder (OCD) accord more importance than healthy controls (HC) to alternative conclusions, resulting in increased doubt regarding an initial conclusion. The goal of the present study was to replicate and extend this finding.

Methods: Eighteen participants diagnosed with OCD and 16 HC completed the Reasoning with Inductive Arguments Task (RIAT), which operationalizes doubt as change in confidence towards a conclusion after alternative conclusions are presented.

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Objective: Several overlapping cognitive processes have been identified in eating disorders (EDs) and obsessive compulsive disorder (OCD). Drawing from the OCD literature, the present study examined whether bulimia nervosa (BN) is associated with a maladaptive inductive reasoning style characterized by the over-investment in possibility-based (as opposed to reality-based) information.

Method: Women with BN (n = 25) and healthy controls (HC; n = 24) completed the Inference Processes Task (IPT), an ecological inductive reasoning task previously validated in OCD samples.

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Neurocognitive functioning in Tourette syndrome (TS) has been the subject of intensive research in the past 30 years. A variety of impairments, presumably related to frontal and frontostriatal dysfunctions, have been observed. These impairments were found in various domains, such as attention, memory, executive functions, language, motor and visuomotor functions, among others.

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