A worrying trend in Social Anxiety: To what degree are worry and its cognitive factors associated with youth Social Anxiety Disorder?

Development and validation of experimental induction tasks for worry and rumination: A comparison of scripted and personalized approaches

Worry and rumination are two forms of repetitive negative thoughts. Prior studies have identified similarities and differences between these two states. For a more comprehensive understanding of these thought processes, researchers need reliable methods to induce them experimentally. Traditionally, researchers have used either scripted or personalized approaches to trigger worry and rumination, but it remains unclear which method is more effective. Additionally, the potential impact of preexisting disorders like generalized anxiety disorder (GAD) or major depression (MDD) on these inductions is not well understood. This study aimed to compare scripted and personalized induction methods to identify which was more effective for eliciting worry and rumination, while also considering the potential influence of generalized anxiety and depression. Participants (N = 355) included individuals with GAD, depression, or healthy controls. They were randomly assigned to either scripted or personalized induction tasks designed to induce worry or rumination. Findings revealed that personalized induction methods were consistently more effective than scripted methods for inducing both worry and rumination, regardless of participants' group characteristics. In addition to the general underperformance of scripted induction methods, the scripted rumination induction was notably less successful, failing to induce rumination to a greater extent than the scripted worry induction. Given these findings, personalized approaches are recommended for experimental studies that aim to compare worry and rumination. Limitations of the study and implications for future research are also discussed.

Relationships between metacognitive beliefs and anxiety and depression in children and adolescents: A meta-analysis

BACKGROUND

As hypothesized in the Self-Regulatory Executive Function (S-REF) model, metacognitive beliefs are associated with anxiety and depression in adults. An important question is the extent to which such effects are present in children and adolescents, with the implication that the model may also apply to young people. The aim of this meta-analysis was to synthesize results on the nature and magnitude of associations between metacognitive beliefs and anxiety and depression in children and adolescents.

METHODS

Systematic searches were conducted to identify studies that investigated: (1) group differences in metacognitive beliefs in clinical compared to non-clinical samples or (2) correlations between metacognitive beliefs and symptoms of anxiety and depression.

RESULTS

Forty papers were identified comprising a total sample of 9,887 participants aged 7-18 years. Meta-analyses revealed that clinical samples endorsed significantly elevated metacognitive beliefs on four out of the five domains measured (i.e., negative beliefs about worry, cognitive confidence, need for control, and cognitive self-consciousness, with the only exception being positive beliefs about worry) compared to non-clinical samples with a small to large effect (Hedges' gs = 0.45-1.22). Moreover, all five domains of metacognitive beliefs were significantly and positively correlated with symptoms of anxiety and depression of a small to large effect (rs = .24-.53). Negative beliefs about worry showed the strongest relationship with clinical status and the magnitude of symptoms.

LIMITATIONS

The number of studies did not allow for an evaluation of metacognitive beliefs at a disorder-specific level.

CONCLUSIONS

In line with the S-REF model, our findings provide evidence of robust cross-sectional relationships between metacognitions and both anxiety and depression in childhood and adolescence.

An Integrative Model of Youth Anxiety: Cognitive-Affective Processes and Parenting in Developmental Context

Multiple theoretical frameworks have been proposed to provide a more comprehensive picture of the risk factors that influence anxiety-related developmental trajectories. Nonetheless, there remains a need for an integrative model that outlines: (1) which risk factors may be most pertinent at different points in development, and (2) how parenting may maintain, exacerbate, or attenuate an affective style that is characterized by high negative emotional reactivity to unfamiliar, uncertain, and threatening situations. A developmentally informed, integrative model has the potential to guide treatment development and delivery, which is critical to reducing the public health burden associated with these disorders. This paper outlines a model integrating research on many well-established risk mechanisms for anxiety disorders, focusing on (1) the developmental progression from emotional reactivity constructs early in life to those involving higher-level cognitive processes later in youth, and (2) potential pathways by which parenting may impact the stability of youth's cognitive-affective responses to threat-relevant information across development.

Psychometric Properties of the Iranian Version of Contrast Avoidance Questionnaires: Could Contrast Avoidance Be a New Transdiagnostic Construct?

The contrast avoidance model (CAM) hypothesizes that individuals with chronic worry recruit worry to create and maintain a negative emotional state to avoid sudden increases in negative emotions. Preliminary evidence using the contrast avoidance questionnaires (CAQs) suggests that there might be a similar mechanism across mood and other anxiety disorders. To continue to assess the CAQs, they should be adapted for other languages and evaluated across multiple symptom domains. The present study aimed to develop the Persian versions of the CAQs and examine the transdiagnostic nature of CAM across two studies. A large Persian-speaking college student sample (Total n = 1438) was used to evaluate the factor structure of the CAQs (Study 1) and the psychometric properties of CAQs (Study 2). Results supported the two-factor structure of the CAQ-W (worry) and CAQ-GE (general emotion). Results showed that CAQ-W was a significant predictor of anxiety-related measures. However, CAQ-GE and IUS-12 significantly predicted depressive and other symptoms over the CAQ-W. Results demonstrated excellent psychometric properties. They indicate that contrast avoidance, measured via CAQ-GE, could be a transdiagnostic construct, and CAQ-W may be more sensitive to anxiety-specific contrast avoidance among Persian speaking and/or Iranian individuals.

Examining the Longitudinal Relationship Between Metacognitive Beliefs and Psychological Distress in an Adolescent Population: A Preliminary Analysis

Adolescence is a period marked by significant vulnerability to the onset of mental health concerns. Within adults, the metacognitive model of psychological disorders advocates for the involvement of metacognitive beliefs in the onset, and maintenance, of psychopathology. The current study aimed to assess the applicability of the metacognitive model in adolescence by exploring the relationship, as well as the trajectory, between metacognitive beliefs and psychological distress. The longitudinal prospective cohort study investigated data from a community-based sample of participants aged 12 to 13. Self-report assessment measures of metacognitive beliefs, psychological distress, and somatic distress are reported across four time-points. Baseline assessments are reported for 70 participants, which reduced to 53 participants at time-point four. Correlational analyses demonstrated a significant relationship between overall metacognition, as well as negative metacognitive beliefs, and psychological distress at each of the four time-points. Generalised Estimating Equations found a significant association between metacognitive predictors and psychological distress over the four time-points. These results indicate that negative metacognitive beliefs, positive metacognitive beliefs, metacognitive beliefs related to superstition, punishment, and responsibility, low perceived levels of cognitive confidence and cognitive self-consciousness predict psychological distress over 12 months in adolescents aged 12 to 13. The strongest longitudinal correlational structure was found for the model of negative metacognitive beliefs and psychological distress. These findings provide preliminary evidence for the positive linear relationship between metacognitive beliefs and psychological distress in adolescence. The study provides an important contribution to understanding the role of metacognitive beliefs in the aetiology and perpetuation of psychological distress in adolescence.

Examining the Latent Dimensions of Social Anxiety Disorder

While the body of literature has investigated the latent dimensions of Social Anxiety Disorder (SAD), only few have directly anchored in the DSM-5 SAD symptoms. Similarly, a continuing issue on measuring mental health disorders pertains to whether a symptom's frequency, intensity, or both, are appropriate and sufficient indicators of severity. To address this gap, the present study developed and validated a DSM-5-based measurement tool, the Social Anxiety Symptom Severity Inventory (SASSI), which assesses both the intensity (intensity of disturbance) and frequency (frequency of occurrence) of SAD symptoms. In study 1 (n = 6458, college students), the results revealed a two-factor structure using exploratory structural equation modeling. In study 2 (n = 425, left-behind emerging adults), confirmatory factor analysis, measurement invariance testing, and latent class analysis were used. Findings demonstrated the importance of using both frequency and intensity of symptoms in assessing SAD severity. Moreover, a five-class solution best fitted the sample. Studies 1 and 2 demonstrated the good psychometric properties of SASSI and filled an important gap among available measures in assessing SAD severity through symptom frequency and intensity.

Feasibility of an Intensive, Disorder-Specific, Group-Based Cognitive Behavioural Therapy Intervention for Adolescents with Social Anxiety Disorder

This study examined the preliminary acceptability and efficacy of an intensive, group-based, disorder-specific cognitive behavioural therapy (CBT) intervention for adolescents with social anxiety disorder (SAD). Fourteen Australian adolescents with SAD (78.6% female, M age = 13.93 years) and their parents completed the program plus measures of treatment satisfaction, and provided feedback. Clinical interviews and surveys were administered pre-treatment, post-treatment, and at 6-month follow-up to determine diagnostic status and assess related variables. Post-treatment satisfaction scores were very high for adolescents and parents. Post-treatment, 32.3% of participants no longer met criteria for SAD diagnosis, increasing to 42.9% at follow-up. Participants showed sizeable reductions in comorbid diagnoses, significant improvements in global functioning, social anxiety symptoms, and internalising symptoms from pre- to post-treatment (maintained at follow-up), and significant improvements in social skills and social competence from pre-treatment to follow-up. This study supports the use of an intensive CBT program for adolescents with SAD.

The heterogeneity of negative problem orientation in Chinese adolescents: A latent profile analysis

Negative problem orientation (NPO) has become an essential construct for comprehending social problem-solving deficits. However, the heterogeneity of NPO has not yet been explored. With a sample of Chinese adolescents (N = 2,174), four latent profiles were identified as lower NPO, moderate NPO, self-inefficacy and negative outcome expectancy (SI&NOE), and dysfunctional NPO. Compared to the lower NPO and moderate NPO, a greater percentage of boys in the SI&NOE and dysfunctional NPO profiles than were girls. In addition, lower grades and younger adolescents tended to engage in the moderate NPO and SI&NOE profiles. The dysfunctional NPO reported higher levels of worry, depressive symptoms, anxiety, and stress, and worse sleep quality than the other profiles. The implications of these findings are discussed herein.

Intolerance of Uncertainty and Health-Related Anxiety in Youth amid the COVID-19 Pandemic: Understanding and Weathering the Continuing Storm

The COVID-19 pandemic is a public health crisis that continues to impact individuals worldwide. While children may be less susceptible to severe medical complications, they are nonetheless vulnerable to stress and anxiety associated with the pandemic. However, current understanding of psychological functioning and potential strategies to mitigate distress amid a pandemic is naturally limited. Consequently, this article is an attempt to fill that gap. Existing literature on pandemics, health-related anxieties, intolerance of uncertainty, and psychopathological sequelae is summarized within the context of the COVID-19 outbreak. Conclusions from the empirical data and emerging theoretical models are reviewed and synthesized. Finally, several potentially engaging and effective examples of developmentally appropriate interventions targeting intolerance of uncertainty and health-related anxieties in pediatric patients during the peri- and post-pandemic periods are described.

The Association between Metacognitions and Worry: The Mediator Role of Experiential Avoidance Strategies

Although experiential avoidance is emphasized as an underlying factor for persevering worry, limited empirical attempt exists to integrate this concept with cognitive models explaining pathological worry. Therefore, the current study aims to investigate the mediator role of different experiential avoidance strategies in the relationship between metacognitions and worry-related symptoms. The study was conducted with a community sample consisting of 563 volunteer participants (405 females, 158 males) whose ages ranged between 18 and 40 (M = 25.56, SD = 4.72). Online data collection of self-report measures including demographic information form, Metacognitions Questionnaire-30, Multidimensional Experiential Avoidance Questionnaire, and Penn State Worry Questionnaire was applied. The results of the hierarchical regression analysis revealed that experiential avoidance predicted worry beyond metacognition. In addition, particular avoidant strategies, aversion/avoidance, procrastination, distraction, and distress endurance explained the associations between positive and negative metacognitive beliefs and worry. Current findings point to different avoidant strategies that might play a role in the intensification and maintenance of worry and suggest the benefits of incorporating acceptance and commitment-based interventions with metacognitive therapy for better therapeutic outcomes.

Relative deprivation and social anxiety among Chinese migrant children: Testing a moderated mediation model of perceived control and belief in a just world

To examine the relationship between relative deprivation and social anxiety, which affects mental health, and investigate the mediating role of perceived control and the moderating role of belief in a just world (BJW) in an understudied population in Asia, we surveyed 1573 rural-to-urban migrant children (48% female; M_age = 12.3, SD = 1.7) in southeast China. Relative deprivation was positively correlated with social anxiety; perceived control partially mediated this connection. Moreover, BJW moderated the indirect effect, which was stronger for male migrant children with lower levels of BJW. The limitations and practical implications of this study are discussed.

Thinking about worry: A systematic review and meta-analysis on the assessment of metacognitions in children and adolescents

BACKGROUND

The metacognitive model of generalized anxiety disorder identifies three forms of metacognition: Positive metacognitive beliefs about worry (POS), negative metacognitive beliefs about worry (NEG), and meta-worry. Though this model was originally developed relying on adult samples, it has since been applied to children and youth in different studies, and results mostly support its validity for this group. As the roles of POS, meta-worry, and age-effects do not appear to be fully clarified for children and adolescents yet, an integration of studies on children and adolescents and the metacognitive model is both timely and worthwhile.

AIM

To summarize the current research on relationships, age-effects, and measurements for POS, NEG, and meta-worry in childhood and youth.

METHODS

We carried out a literature search in the electronic databases PsycINFO, PubMed, PSYNDEX, and ERIC in 2017 and updated in 2020. Empirical research in German or English language on metacognition was included with child and adolescent samples diagnosed with anxiety disorders or healthy controls if POS, NEG, or meta-worry were measured. Studies were included for meta-analysis if they reported correlations between these metacognitions and anxiety or worry. Consensus rating for eligibility was done for 20.89% of full-texts with 90.32% agreement. Risk of bias was assessed with the appraisal tool for cross-sectional studies and consensus rating of appraisal tool for cross-sectional studies for 20.83% of included studies attaining agreement of intraclass correlation = 0.898. Overall, correlations between metacognitions, anxiety and worry were calculated with RevMan 5.4.1, assuming random-effects models. Meta-regressions with mean age as the covariate were performed via the online tool MetaMar 2.7.0. PROSPERO-ID: CRD42018078852.

RESULTS

Overall, k = 763 records and k = 78 additional records were identified. Of those, k = 48 studies with 12839 participants were included and of those, k = 24 studies were included for meta-analysis. Most studies showed consistent NEG correlations with worry and anxiety, as well as higher values for clinical than for non-clinical samples. POS findings were less consistent. Meta-analysis revealed large effects for NEG correlating with worry and anxiety, small to medium effects for POS correlating with worry and anxiety, as well as small to medium effects for POS correlating with NEG. Meta-regressions did not reveal mean age as a significant covariate. Meta-worry was assessed in only one study. We identified eight questionnaires and one interview-format that assess metacognition about worry in children and adolescents.

CONCLUSION

POS and NEG are measurable from the age of seven upwards and correlate with anxiety and worry without influences by age. Meta-worry requires further investigation.

The relationship between executive functioning and repetitive negative thinking in youth: A systematic review of the literature

Repetitive negative thinking (RNT) and executive functioning (EF) deficits are each characteristic of many forms of youth psychopathology. Extensive work has examined the relationship between rumination, a form of RNT, and EF in adults. However, less is known about the relationship between RNT more broadly and EF in youth, for whom these constructs are developing and emerging. Here, we systematically and qualitatively reviewed 27 studies on the associations between EF (e.g., shifting, inhibition, working memory) and RNT (e.g., rumination, worry, obsessions) in youth. All forms of RNT were more commonly positively associated with questionnaire-reported EF problems in daily life, most frequently in the domain of shifting. Task-based assessments of EF were less consistently associated with RNT in youth, with no strong pattern of presence vs. absence of associations. Further, limited longitudinal work has been conducted on this topic to date. This review integrates initial work with regard to RNT and EF deficits in a still-developing population, and discusses clear future need for longitudinal, multi-method assessments of the relationship between RNT and EF subtypes in youth.

Negative Problems Orientation Questionnaire for Chinese Adolescents: Bifactor Model and Measurement Invariance

The Negative Problem Orientation Questionnaire (NPOQ) is a widely used tool for assessing negative problem orientation (NPO). However, its construct and measurement invariance has not been adequately tested in adolescents. The present study explored the possible construct of the NPOQ and its measurement invariance in a sample of 754 Chinese adolescents (51.6% girls, all 12–18 years old). The results supported a bifactor model of the NPOQ that consists of a general factor NPO and three domain-specific factors including perceived threat, self-inefficacy, and negative outcome expectancy. A multiple-group CFA indicated that the bifactor model showed strict invariance across gender and age. The general and domain factors showed unique variance in indexes of worry, depression, anxiety, and stress, which supported well incremental validity of them. This study confirms for a bifactor conceptualization of the NPOQ and its measurement invariance across gender and age in Chinese adolescents. Additionally, it is recommended that the total score should be used to assess NPO in Chinese adolescents.

Intolerance of Uncertainty and Parental Accommodation: Promising Targets for Personalized Intervention for Youth Anxiety

PURPOSE OF REVIEW

After reviewing predictors of differential outcomes of cognitive behavioral therapy (CBT) for pediatric anxiety, we identify and discuss recent evidence for the role of (a) intolerance of uncertainty (IU) and (b) parental accommodation as meaningful targets for personalized intervention.

RECENT FINDINGS

Few studies to date have identified promising, theory-driven predictors of differential CBT outcomes. Recent findings suggest that increased IU and high levels of parental accommodation are associated with a poorer response to CBT. Several adaptations of CBT and new interventions targeting either IU or parental accommodation have been developed and found to be efficacious in preliminary studies. IU and parental accommodation are promising constructs for personalizing intervention, both in the identification of who will respond to treatment and in the development of targeted intervention. We recommend that future work test if individuals high in IU and/or parental accommodation will respond more optimally to treatments that specifically target these constructs. The results of this future work may help to move the field closer to personalized intervention.

Intolerance of uncertainty in youth: Psychometrics of the Intolerance of Uncertainty Index-A for Children

Intolerance of uncertainty (IU) is a cognitive vulnerability for pathological anxiety. The current study adapted the Intolerance of Uncertainty Index-A for Children (IUI-A-C), and created a single-item Intolerance of Uncertainty Clinician-Rated Index (IUCR), both of which assess a youth's general inability to endure uncertainty. Psychometric properties of these two measures were evaluated. Participants were 146 youth aged 7-17 years seeking treatment for anxiety. The IUI-A-C evidenced individual item performance (i.e., correlations between each item and the total remainder score > .40, ps <.001), internal consistency, convergent validity with the IUCR and self-report measures of anxiety and functional impairment, divergent validity with ADHD severity, and retest reliability with a mean interval of over four weeks. The IUCR also evidenced convergent validity with the IUI-A-C and self-report measures of anxiety and functional impairment and divergent validity with ADHD severity. The IUI-A-C predicted composite principal diagnosis severity but did not predict composite GAD diagnosis severity. The IUI-A-C and IUCR have utility as measures of IU in youth. The role of IU in specific anxiety disorders and future research are discussed.

Social problem solving in social anxiety disorder

Successful social problem solving requires both an adaptive orientation toward the problem and the necessary skills to generate relevant and effective solutions. Surprisingly few studies have examined social problem solving in the context of social anxiety. We examined social problem solving in 38 participants with social anxiety disorder (SAD) in comparison to 30 healthy control (HC) participants with no history of anxiety problems. Participants rated their problem solving attitudes and abilities (i.e., problem orientation) and then generated solutions to hypothetical interpersonal problems from both their own perspective and that of an objective other. These solutions were coded for effectiveness and relevance, as well as the degree to which the solution was active versus passive. Participants with SAD exhibited a more negative problem orientation than HC participants. Furthermore, although SAD and HC participants demonstrated no overall differences in generating relevant and effective solutions to interpersonal problems, utilizing a personal perspective facilitated the generation of more active solutions for HC participants, but less active solutions for those with SAD. Findings illuminate new research directions regarding social problem solving in social anxiety, with potential implications for applied intervention.

The Metacognitions Questionnaire and Its Derivatives in Children and Adolescents: A Systematic Review of Psychometric Properties

Background: The Metacognitions Questionnaire (MCQ) and its derivatives have been instrumental in research examining the Self-Regulatory Executive Function Model in adults. Studies testing whether findings are applicable to children and adolescents have been increasing and several different measures adapting the MCQ for younger populations have been developed. The current study aimed to systematically review the psychometric properties of MCQ measures or derivatives used in young people (aged 18 or less), to help assess current findings in this population and to guide future research in this growing area of investigation. Method: Systematic searches were carried out on PubMed and PsycINFO of studies published up to June 2018. Additional studies were identified through Google Scholar and article references. Validity, reliability, range and responsiveness of measures were examined as well as analyses of age and gender differences on scores. Results: Forty-five articles were identified. The total sample consisted of 7,803 children and adolescents (6,922 non-clinical, 881 clinical) aged 7-18. Studies used one of seven versions of the questionnaire, five adapted from the MCQ for younger populations: (1) The Metacognitions Questionnaire-Adolescent version; (2) The Metacognitions Questionnaire-Child version; (3) The Metacognitions Questionnaire-Child Version-Revised; (4) The Metacognitions Questionnaire-Child-30; and (5) The Metacognitions Questionnaire-65 Positive Beliefs Scale Revised; and two adult versions used without adaptation: (1) The Metacognitions Questionnaire-30 and (2) The Cognitive Self Consciousness Scale-Expanded. The validity and reliability of the Metacognitions Questionnaire-Adolescent version had the most extensive support. Other questionnaires had either mixed psychometrics or promising initial findings but more limited data. Conclusions: It is recommended that studies using adolescents (age 12-18) consider using the Metacognitions Questionnaire-Adolescent version. Based on initial data, it is suggested studies using younger populations should consider the Metacognitions Questionnaire-Child-30 but further psychometric research into this and other measures is needed.

Moderating effects of the valence of social interaction on the dysfunctional consequences of perseverative cognition: an ecological study in major depression and social anxiety disorder

BACKGROUND AND OBJECTIVES

Major depression disorder (MDD) and social anxiety disorder (SAD) are characterized by the use of perseverative cognition (PC) as a dysfunctional coping strategy. We sought to investigate the dysfunctional physiological and psychological consequences of PC and how the valence of social interactions moderates such consequences in these psychopathological conditions.

DESIGN/METHODS

The study combined 24-hour heart rate variability (HRV) and ecological momentary assessments in 48 individuals with MDD, SAD, and sex-matched controls.

RESULTS

In all participants, PC was associated with mood worsening and reduced ability of the parasympathetic nervous system, mainly the vagus, to inhibit sympathetic arousal (i.e., reduced HRV). Individuals with SAD had the highest frequency of daily PC, while those with MDD reported that PC interfered more with their ongoing activities. In SAD, daily PC was associated with significantly lower HRV after negative social interactions. Individuals with MDD reported higher levels of sadness during PC irrespective of the valence of the preceding social interaction but higher levels of anxiety and efforts to inhibit PC following positive interactions.

CONCLUSIONS

Results highlight the need to account for important moderators like the valence of social interaction when looking at the physiological consequences of maladaptive emotion regulation strategies.

Exploring the role of the DSM-5 performance-only specifier in adolescents with social anxiety disorder

The DSM-5 social anxiety disorder section has recently added the performance-only specifier for individuals whose anxiety is limited to speaking or performing in public. The impact of the DSM-5 performance-only specifier remains a neglected area. The sample comprised 44 healthy controls and 50 adolescents with a clinical diagnosis of SAD (20% met criteria for the performance-only specifier). Findings revealed that adolescents with the specifier had a later age of onset; lower levels of depression, social anxiety symptomatology and clinical severity; and a lesser degree of comorbidity relative to adolescents with SAD but excluding the performance-only specifier. Specifiers only evidenced higher (cognitive) social anxiety symptomatology compared to healthy controls. Results of this study also suggested that the performance-only specifier may correspond to a mild form of social anxiety disorder. Data also revealed that SAD exists on a continuum of severity among healthy controls, specifier participants, and those with both interactional and performance fears, which is consistent with a dimensional structure for SAD. Finally, findings suggested a unique comorbid pattern for specifiers and those adolescents with SAD but excluding the performance-only specifier. The implications of these findings for the etiology, assessment, classification, and treatment of social anxiety in youth are discussed.

Intolerance of Uncertainty, anxiety, and worry in children and adolescents: A meta-analysis

BACKGROUND

Intolerance of uncertainty (IU) has been implicated in the development and maintenance of worry and anxiety in adults and there is an increasing interest in the role that IU may play in anxiety and worry in children and adolescents.

METHOD

We conducted a systematic review and meta-analysis to summarize existing research on IU with regard to anxiety and worry in young people, and to provide a context for considering future directions in this area of research. The systematic review yielded 31 studies that investigated the association of IU with either anxiety or worry in children and adolescents.

RESULTS

The meta-analysis showed that IU accounted for 36.00% of the variance in anxiety and 39.69% in worry. Due to the low number of studies and methodological factors, examination of potential moderators was limited; and of those we were able to examine, none were significant moderators of either association. Most studies relied on questionnaire measures of IU, anxiety, and worry; all studies except one were cross-sectional and the majority of the studies were with community samples.

LIMITATIONS

The inclusion of eligible studies was limited to studies published in English that focus on typically developing children.

CONCLUSIONS

There is a strong association between IU and both anxiety and worry in young people therefore IU may be a relevant construct to target in treatment. To extend the existing literature, future research should incorporate longitudinal and experimental designs, and include samples of young people who have a range of anxiety disorders.