Ella L. Oar

Macquarie University · Centre for Emotional Health (CEH)

The present study evaluated the effectiveness of a modified One Session Treatment (OST), which included an e-therapy homework maintenance program over 4 weeks for Blood-Injection-Injury (BII) phobia in children and adolescents. Using a single case, non-concurrent multiple-baseline design, 24 children and adolescents (8-18 years; 7 males, 17 females...

Blood-injection-injury (BII) phobia is a chronic and debilitating disorder, which has largely been neglected in the child literature. The present paper briefly reviews the aetiology of specific phobias with particular attention to BII and provides an integrated developmental model of this disorder in youth. Evidence-based treatments for child-speci...

This study examined the feasibility and preliminary effectiveness of d-cycloserine (DCS)–augmented cognitive behavioral therapy (CBT) for children and adolescents with difficult-to-treat Obsessive Compulsive Disorder, in a double-blind randomized controlled pilot trial (RCT). Seventeen children and adolescents (aged 8–18 years) with a primary diagn...

This study examined the efficacy of combining two promising approaches to treating children’s specific phobias, namely attention training and one 3-hour session of exposure therapy (‘one-session treatment’, OST). Attention training towards positive stimuli (ATP) and OST (ATP+OST) was expected to have more positive effects on implicit and explicit c...

This pilot study evaluated the effectiveness of group cognitive-behavioral treatment (CBT) on treatment outcomes for children and adolescents who presented with obsessive-compulsive disorder (OCD) and complex comorbid conditions, including depression, attention deficit/hyperactivity disorder and pervasive developmental disorders (PDD). Specifically...

Body dysmorphic disorder (BDD) is a common and debilitating disorder in adolescents, yet there is little research on the disorder in young people. The current study aimed to investigate peer relationship factors in 26 adolescents (aged 12 to 17 years) with BDD, compared to 27 adolescents with anxiety disorders and 25 adolescents without mental diso...

Anxiety disorders are common, emerge during childhood, and pose a significant burden to society and individuals. Research evaluating the impact of anxiety on functional impairment and quality of life (QoL) is increasing; however, there is yet to be a systematic review and meta-analysis of these relationships in pediatric samples. This systematic re...

Sleep problems commonly co-occur alongside generalized and social anxiety, depression, and eating disorders in young people. Yet it is unclear if sleep disturbance conveys risk for these social-emotional disorders across early to middle adolescence and whether repetitive negative thinking (RNT) mediates this association. In this study, we examined...

Adolescence is a time of heightened vulnerability for both peer victimization (PV) and internalizing symptoms. While the positive association between them is well established, there is little understanding of the mechanisms underpinning this relationship. To address this gap, the current study aimed to investigate sleep hygiene and school night sle...

Research has consistently shown that more physically attractive individuals are perceived by others to be happier and better psychologically adjusted than those perceived as less attractive. However, due to the lack of longitudinal research in adolescents, it is still unclear whether poor mental health predicts or is predicted by either objective o...

Study objectives: Parental warmth in adolescence protects sleep in early adulthood, yet the nature, directions, and mechanisms of this association across adolescence are unknown. This study examined parental warmth, adolescent sleep hygiene and sleep outcomes (morning/eveningness, school night sleep duration and daytime sleepiness) across five ann...

Time spent on social media and making online comparisons with others may influence users’ mental health. This study examined links between parental control over the time their child spends on social media, preadolescents’ time spent browsing social media, preadolescents’ appearance comparisons on social media, and preadolescents’ appearance satisfa...

Objectives The aims of this study were to determine the impact of adolescent-relevant risk factors on changes in social anxiety symptoms from pre-to early-adolescence. Methods From 2016 to 2018, 528 youth (51% boys) were tested in three annual waves across grades 6, 7, and 8 (M ages 11.2, 12.7, 13.7 years). Through online surveys youth reported on...

A considerable body of research in adults has demonstrated that anxiety disorders are characterised by attentional biases to threat. Findings in children have been inconsistent. The present study examined anxiety-related attention biases using eye tracking methodology in 463 preadolescents between 10 and 12 years of age, of whom 92 met criteria for...

This three-wave panel study examined the prospective and bidirectional relationships between parental control of social media use, and parents’ and adolescents’ perceived time spent on social media over a 2-year period. Adolescents (52% males, T1: M age = 12.19, SD = 0.52) and one of their parents (96% mothers, T1: M age = 45.26, SD = 4.28) complet...

Research into the aetiology, maintenance, and treatment of obsessive-compulsive disorder (OCD) has largely been informed by models of anxiety. However, non-experimental research suggests that some individuals may engage in compulsions to neutralise shame, with repugnant obsessions associated with more shame than other obsessions. Violent and sexual...

Background Parenting is a modifiable factor proposed to underpin the transmission of anxiety and depression from parents to children. This study examined the role of parenting in the intergenerational transmission of anxiety and depression across pre- and early adolescence. Method Participants were 531 youth (Mage = 11.18, SD = 0.56; 50.85% boys)...

Much of the literature investigating the association between coping and psychopathology is cross-sectional, or associations have been investigated in a unidirectional manner; hence, bidirectionality between coping and psychopathology remains largely untested. To address this gap, this study investigated bidirectional relations between coping and ps...

Objective A bi-directional relationship between technology use and adolescent sleep is likely, yet findings are mixed, and it is not known whether parental control of technology use can protect sleep. The current study examined bi-directionality between technology use on school nights and morning/eveningness, sleep duration and daytime sleepiness i...

This study examined: 1) the relationship between negative parental beliefs about child anxiety (i.e., it is harmful), insecure parental attachment and parental accommodation of child anxiety; 2) whether parental attachment insecurity moderates the effect of negative beliefs about anxiety on parent accommodation; and 3) a path model of parental fact...

The restrictions put in place to contain the COVID-19 virus have led to widespread social isolation, impacting mental health worldwide. These restrictions may be particularly difficult for adolescents, who rely heavily on their peer connections for emotional support. However, there has been no longitudinal research examining the psychological impac...

Social anxiety is a common mental disorder with an average age of onset in early adolescence. Current theories focus largely on risk factors that are present from early in life, but reasons for onset of the disorder as youth move into adolescence are rarely discussed. We recently proposed a model of the onset of certain mental disorders during the...

Objectives: Preadolescent social media use is normative and could influence mental health. This study investigated: (a) Differences between preadolescent users and non-users of various social media platforms on mental health, (b) unique links between time spent on those platforms, appearance-based activities on social media, and mental health, and...

Social isolation may be a unique risk factor for depression and anxiety in early adolescence. However, optimal sleep may protect adolescents from the emotional sequela of social isolation. The present study aimed to investigate whether sleep moderates the relationship between social isolation and symptoms of anxiety and depression in early adolesce...

This research investigated associations between socially prescribed and self-orientated perfectionism, and the social functioning of 510 preteens (Mage = 11.2). The study focused on predictions from the Perfectionism Social Disconnection Model (PSDM) by determining whether rejection sensitivity and social isolation, in that sequence, mediated the a...

The adolescent developmental stage appears to be a sensitive period for the onset of several particular forms of mental disorder that are characterised by heightened emotionality and social sensitivity and are more common in females than males. We refer to these disorders (social anxiety disorder, generalised anxiety disorder, eating disorders, maj...

Repetitive negative thinking (RNT) is a key risk and maintenance factor for many psychological disorders and is considered a transdiagnostic process. However, there are few disorder-neutral measures that assess RNT in adults, only 1 of moderate length considered suitable for children, and none that are validated for both children and adults. This s...

Time spent on social media and making online comparisons with others may influence users’ mental health. This study examined links between parental control over the time their child spends on social media, preadolescents’ time spent browsing social media, preadolescents’ appearance comparisons on social media, and preadolescents’ appearance satisfa...

Background D‐Cycloserine has potential to enhance exposure therapy outcomes. The current study presents a preliminary randomized, placebo‐controlled double‐blind pilot trial of DCS‐augmented one‐session treatment (OST) for youth (7–14 years) with specific phobia. A secondary aim of this pilot study was to explore the effects of youth age and within...

Anxiety and depression are highly prevalent disorders in youth. Assessments for these disorders in young people typically include clinician-administered instruments such as diagnostic interviews and parent- and youth-report questionnaires. Cognitive behavioral therapy is considered a well-established treatment for both anxiety and depression. Lates...

This article discusses considerations for adapting cognitive behavioral therapy (CBT) techniques and processes with anxious children and adolescents. To successfully deliver CBT with this population, the therapist must take into consideration the child's developmental level and other contextual factors that may affect treatment outcome. Suggested a...

Blood-Injection-Injury (BII) Phobia is a severe and impairing disorder that has been understudied in youth. The present study aimed to define patterns of response and remission following a modified One-Session Treatment (OST) including an e-therapy maintenance program for children and adolescents with BII Phobia. Moreover, characteristics of differ...

In this chapter, we discuss aggressive obsessions, which are obsessions related to violence or harm towards the self or others. Aggressive obsessions are highly distressing and prevalent, with reports of 30 to 70 % of youth obsessive-compulsive disorder (OCD) sufferers experiencing these symptoms. We outline the phenomenology and background literat...

Cognitive behaviour therapy (CBT), incorporating exposure and response prevention (ERP), has received strong empirical support for the treatment of paediatric OCD, and moreover, is considered the first line treatment of choice (Geller & March, 2012). However, despite the availability of effective treatments for this chronic and debilitating disorde...

Blood–Injection-Injury (BII) phobia is a particularly debilitating condition that has been largely ignored in the child literature. The present study examined the clinical phenomenology of BII phobia in 27 youth, relative to 25 youth with dog phobia - one of the most common and well-studied phobia subtypes in youth. Children were compared on measur...

This study aimed to examine parents' perceptions of established treatments, including cognitive behaviour therapy (CBT) and selective serotonin reuptake inhibitors (SSRIs), relative to novel treatments of D-cycloserine (DCS) and attention bias modification (ABM) augmented CBT to determine if novel treatments are perceived as more or less favorable...

The one session treatment approach (Öst, 1989) incorporates cognitive behavioural techniques into a single 3-hour intensive session. This treatment approach has led the field in the development of more efficient and intensive approaches for treating childhood anxiety problems, and for childhood specific phobia is now considered a ‘well established’...

Preliminary evidence for the efficacy of intensive treatments for childhood OCD is promising. This is an important area of research as traditional weekly CBT for OCD is costly, time intensive and is often challenging for families to access. This review explores the evidence base for intensive treatments for childhood OCD and following this, provide...

Children typically experience a range of fears during the course of their development. The content of these fears follows a predictable course that coincides with increasing cognitive development (Gullone, 2000; Muris et al., 2000; Ollendick et al., 2004), from concrete fears in infancy and toddlerhood (e.g. strangers and animals) to increasingly m...

Anxiety disorders are the most common mental health problems in youth, affecting 8–27 % of youth (Costello, Egger, & Angold, 2005). These disorders represent serious mental health problems for children and adolescents and lead to daily distress and impairment, peer and social relation problems (Chansky & Kendall, 1997; Langley, Bergman, McCracken,...

Objective: This study aimed to extend current research into cognitive models of obsessive–compulsive disorder (OCD) in a pediatric sample by examining the impact of perceived responsibility on memory confidence, intolerance of uncertainty (IU) and checking urge using an experimental design to manipulate perceived responsibility. It was hypothesised...

This study assessed the effect of ingroup norms and empathy on 6 and 9-year-old children's (N=161) attitudes and aggressive intentions toward outgroup members. Prior to an intergroup drawing competition against an outgroup, participants' empathy was measured, and they were randomly assigned to a simulated group with a norm of direct or indirect agg...