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1.
Int J Eat Disord ; 2024 Jul 03.
Article in English | MEDLINE | ID: mdl-38958544

ABSTRACT

OBJECTIVE: Shame is a powerful self-conscious emotion that is often experienced by individuals with eating disorders (EDs). While the association between EDs and shame is well-established, there is limited research investigating the contribution of pre-treatment shame to clinical outcomes. METHOD: Participants (N = 273) received outpatient cognitive-behavioral therapy for eating disorders (CBT-ED). We investigated pre-treatment shame as a predictor of dropout and as a moderator of change in ED psychopathology and clinical impairment from pre-treatment to post-treatment. We also explored the potentially moderating roles of body mass index, ED diagnostic category, and co-occurring anxiety and depression diagnoses. RESULTS: Shame improved substantially (d = 1.28) despite not being explicitly targeted in treatment. Pre-treatment shame did not predict treatment dropout. Individuals high in shame started and ended treatment with higher ED symptoms and impairment than those with low shame. The contribution of pre-treatment shame on the degree of change in symptoms/impairment depended critically on whether analyses controlled for pre-treatment symptoms/impairment. When those were controlled, high pre-treatment shame was associated with substantially less improvement in ED symptoms and impairment. There was some evidence that ED diagnosis and co-occurring depressive diagnoses may moderate the relationship between shame and treatment outcome. Changes in shame were positively associated with changes in ED symptoms and clinical impairment. DISCUSSION: A high level of shame at pre-treatment is not a contraindication for CBT-ED as good therapeutic outcomes can be achieved. However, outcomes may be enhanced among individuals high in shame by offering adjunctive interventions that explicitly target shame.

2.
Int J Eat Disord ; 2024 Jul 17.
Article in English | MEDLINE | ID: mdl-39016107

ABSTRACT

OBJECTIVE: Interpersonal problems have been identified as a plausible mechanism underlying the onset and maintenance of eating disorders. The Interpersonal Relationships in Eating Disorders (IR-ED) scale is the first eating disorders-specific measure of interpersonal problems, which was developed in a nonclinical sample. The aims of the current study were to (a) confirm the factor structure of the IR-ED within a large clinical sample, (b) investigate measurement invariance of the IR-ED across nonclinical and clinical samples, (c) examine the convergent validity of the IR-ED using a generic measure of interpersonal problems, and (d) investigate the incremental clinical utility of the IR-ED in uniquely predicting eating disorder symptomatology. METHOD: Treatment-seeking individuals (N = 437) completed the IR-ED at their initial assessment appointment at a specialist eating disorder outpatient service. RESULTS: A multiple-group confirmatory factor analysis supported an invariant bifactor structure comprising a general interpersonal problems factor and two group factors-Avoidance of Body Evaluation and Food-Related Interpersonal Tension. Convergent validity was demonstrated by a large, statistically significant correlation with a generic measure of interpersonal problems (r = 0.62, p < 0.001). A series of structural equation models further revealed unique incremental predictive utility of the IR-ED for eating disorder symptomatology. DISCUSSION: The IR-ED has strong psychometric properties and may prove beneficial in the assessment, formulation, and treatment of eating-specific interpersonal problems among patients with eating disorders.

3.
Eat Behav ; 54: 101898, 2024 Jun 13.
Article in English | MEDLINE | ID: mdl-38878603

ABSTRACT

OBJECTIVE: To examine rates and predictors of attrition from referral through to treatment completion in an outpatient public psychology service's eating disorder program in Perth, Western Australia. METHOD: The proportion (number) of clients (N = 671; mean age = 23.8 years) transitioning between stages of pre-treatment and treatment was identified. Associations between demographic, treatment and clinical variables and attrition were investigated using logistic regression. RESULTS: Only 34% (n = 230) of referred patients started treatment and 16% (n = 107) completed treatment. Referral acceptance was correlated with provisional diagnoses that meet the service's inclusion criteria, and attendance at an initial assessment was correlated with younger age. Treatment commencement was correlated with the presence of a co-occurring depressive or anxiety disorder, and no previous suicide attempts. Completing a full course of treatment was correlated with no previous hospitalisation for psychiatric issues, no previous suicide attempts, a history of psychiatric medication use, and treatment with family-based therapy. DISCUSSION: High rates of attrition were found from referral to treatment completion. A suggested framework for defining the different stages of attrition is proposed to allow for consistency of attrition reporting across the mental health field. Future studies are needed to identify why clients disengage following referral, assessment, and treatment commencement, to inform strategies to engage and sustain engagement and to optimise outcomes.

4.
Int J Eat Disord ; 2024 Mar 15.
Article in English | MEDLINE | ID: mdl-38488260

ABSTRACT

OBJECTIVE: Eating disorders (EDs) often co-occur with social anxiety disorder (SAD). However, little research has examined the influence of SAD symptoms on ED treatment outcomes in the context of individual outpatient cognitive-behavior therapy for eating disorders (CBT-ED). It is plausible that SAD symptom severity could improve as a result of ED treatment, given the high overlap between EDs and SAD. We sought to test whether baseline SAD symptoms moderate early response to CBT-ED or post-treatment outcomes in CBT-ED, and the degree to which SAD symptoms improve during therapy despite SAD not being an explicit treatment target. METHOD: ED clients (N = 226) aged ≥16 years were treated with CBT-ED. Outcomes were ED symptoms, clinical impairment, and SAD symptoms measured at baseline, session 5 and post-treatment. RESULTS: Baseline SAD was a weak moderator of early and post-treatment ED symptoms and impairment. SAD symptoms improved moderately over treatment among clients who started with elevated levels of SAD symptomology. DISCUSSION: Clients with EDs can experience good therapeutic outcomes regardless of their social anxiety severity at pre-treatment. SAD symptoms reduced over CBT-ED, but protocol enhancements such as exposure-based strategies that directly target co-occurring social-evaluative concerns may help achieve larger reductions in SAD symptoms. PUBLIC SIGNIFICANCE: Eating disorders often co-occur with anxiety disorders such as social anxiety. We found people who had both social anxiety and an eating disorder benefited as much from eating disorder treatment as people who did not have social anxiety. People who were socially anxious became less anxious as a by-product of receiving eating disorder treatment. It may be possible to reduce social anxiety further by enhancing eating disorder treatment protocols.

5.
J Anxiety Disord ; 94: 102676, 2023 03.
Article in English | MEDLINE | ID: mdl-36758344

ABSTRACT

Trials of cognitive behaviour therapy (CBT) for social anxiety disorder (SAD) have struggled to identify replicable moderators of treatment outcome. This could be due to a genuine lack of effects, or a spurious finding caused by methodological factors such as inadequate testing of theory-driven moderators, use of small homogenous samples, failure to model non-linear relationships, and over-reliance on significance testing. We probed explanations for the field's failure to detect moderators by testing whether 15 theory-driven and atheoretical variables moderated treatment outcome in a large heterogeneous sample treated with group CBT for SAD. Moderation was not assessed by only using p-values for linear models, but also by considering effect sizes, plots, and non-linear relationships. Despite using a comprehensive approach to assess moderation, only two variables - the baseline severity of SAD symptoms and fear of negative evaluation (FNE) - were found to moderate social anxiety symptom trajectories. FNE had a non-linear relationship with symptom change that would have been missed using common research methods. Our findings suggest both a genuine lack of effects and limitations of research methods have contributed to the field's inability to identify moderators. We provide suggestions that may increase the likelihood of future researchers detecting genuine effects.


Subject(s)
Cognitive Behavioral Therapy , Phobia, Social , Humans , Phobia, Social/therapy , Anxiety Disorders/psychology , Fear , Cognitive Behavioral Therapy/methods , Treatment Outcome , Anxiety/psychology
6.
Behav Res Ther ; 161: 104253, 2023 02.
Article in English | MEDLINE | ID: mdl-36669272

ABSTRACT

BACKGROUND: Improving the delivery of cognitive-behavioural therapy (CBT) for social anxiety disorder (SAD) requires an in-depth understanding of which cognitive and behavioural mechanisms drive change in social anxiety symptoms (i.e., social interaction anxiety) during and after treatment. The current study explores the dynamic temporal associations between theory-driven cognitive and behavioural mechanisms of symptom change both during and following group CBT. METHODS: A randomized controlled trial of imagery-enhanced CBT (n = 51) versus traditional verbal CBT (n = 54) for social anxiety was completed in a community mental health clinic setting. This study included data collected from 12-weekly sessions and a 1-month follow-up session. Mixed models were used to assess magnitude of change over the course of treatment. Cross-lagged panel models were fit to the data to examine temporal relationships between mechanisms (social-evaluative beliefs, safety behaviours) and social interaction anxiety symptoms. RESULTS: Participants in both CBT groups experienced significant improvements across all cognitive, behavioural, and symptom measures, with no significant differences in the magnitude of changes between treatments. During treatment, greater social-evaluative beliefs (fear of negative evaluation, negative self-portrayals) at one time point (T) were predictive of more severe SAD symptoms and safety behaviours at T+1. Social-evaluative beliefs (fear of negative evaluation, probability and cost of social failure) and safety behaviours measured at post-treatment were positively associated with SAD symptoms at the 1-month follow-up. CONCLUSIONS: The current study identifies social-evaluative beliefs that may be important targets for symptom and avoidance reduction during and following CBT. Assessment of these social-evaluative beliefs throughout treatment may be useful for predicting future SAD symptoms and avoidance, and for adapting treatment to promote optimal change for patients.


Subject(s)
Cognitive Behavioral Therapy , Phobia, Social , Psychotherapy, Group , Humans , Phobia, Social/therapy , Anxiety Disorders/psychology , Anxiety , Cognition
7.
Behav Res Ther ; 155: 104131, 2022 08.
Article in English | MEDLINE | ID: mdl-35696837

ABSTRACT

Social anxiety disorder (SAD) is associated with marked physiological reactivity in social-evaluative situations. However, objective measurement of biomarkers is rarely evaluated in treatment trials, despite potential utility in clarifying disorder-specific physiological correlates. This randomized controlled trial sought to examine the differential impact of imagery-enhanced vs. verbal-based cognitive behavioral group therapy (IE-CBGT, n = 53; VB-CBGT, n = 54) on biomarkers of emotion regulation and arousal during social stress in people with SAD (pre- and post-treatment differences in heart rate variability (HRV) and skin conductance). We acquired psychophysiological data from randomized participants across four social stress test phases (baseline, speech preparation, speech, interaction) at pre-treatment, and 1- and 6-months post-treatment. Analyses revealed that IE-CBGT selectively attenuated heart rate as indexed by increases in median heart rate interval (median-RR) compared to VB-CBGT at post-treatment, whereas one HRV index showed a larger increase in the VB-CBGT condition before but not after controlling for median-RR. Other psychophysiological indices did not differ between conditions. Lower sympathetic arousal in the IE-CBGT condition may have obviated the need for parasympathetic downregulation, whereas the opposite was true for VB-CBGT. These findings provide preliminary insights into the impact of imagery-enhanced and verbally-based psychotherapy for SAD on emotion regulation biomarkers.


Subject(s)
Cognitive Behavioral Therapy , Phobia, Social , Psychotherapy, Group , Cognition , Cognitive Behavioral Therapy/methods , Humans , Phobia, Social/psychology , Phobia, Social/therapy , Psychotherapy, Group/methods , Treatment Outcome
8.
Psychol Med ; 52(7): 1277-1286, 2022 05.
Article in English | MEDLINE | ID: mdl-32912351

ABSTRACT

BACKGROUND: Cognitive behavior therapy (CBT) is effective for most patients with a social anxiety disorder (SAD) but a substantial proportion fails to remit. Experimental and clinical research suggests that enhancing CBT using imagery-based techniques could improve outcomes. It was hypothesized that imagery-enhanced CBT (IE-CBT) would be superior to verbally-based CBT (VB-CBT) on pre-registered outcomes. METHODS: A randomized controlled trial of IE-CBT v. VB-CBT for social anxiety was completed in a community mental health clinic setting. Participants were randomized to IE (n = 53) or VB (n = 54) CBT, with 1-month (primary end point) and 6-month follow-up assessments. Participants completed 12, 2-hour, weekly sessions of IE-CBT or VB-CBT plus 1-month follow-up. RESULTS: Intention to treat analyses showed very large within-treatment effect sizes on the social interaction anxiety at all time points (ds = 2.09-2.62), with no between-treatment differences on this outcome or clinician-rated severity [1-month OR = 1.45 (0.45, 4.62), p = 0.53; 6-month OR = 1.31 (0.42, 4.08), p = 0.65], SAD remission (1-month: IE = 61.04%, VB = 55.09%, p = 0.59); 6-month: IE = 58.73%, VB = 61.89%, p = 0.77), or secondary outcomes. Three adverse events were noted (substance abuse, n = 1 in IE-CBT; temporary increase in suicide risk, n = 1 in each condition, with one being withdrawn at 1-month follow-up). CONCLUSIONS: Group IE-CBT and VB-CBT were safe and there were no significant differences in outcomes. Both treatments were associated with very large within-group effect sizes and the majority of patients remitted following treatment.


Subject(s)
Cognitive Behavioral Therapy , Phobia, Social , Anxiety , Anxiety Disorders/therapy , Cognitive Behavioral Therapy/methods , Humans , Phobia, Social/psychology , Phobia, Social/therapy
9.
Assessment ; 29(8): 1730-1741, 2022 12.
Article in English | MEDLINE | ID: mdl-34229455

ABSTRACT

BACKGROUND: Repetitive negative thinking is conceptualized to be a transdiagnostic process linked to the development and maintenance of psychopathology. Prior research distinguishes between disorder-specific exemplars (worry, rumination) and transdiagnostic measures of repetitive negative thinking with differences across disorders reported. However, establishing the measurement invariance of these measures is necessary to support meaningful comparisons across clinical groups. METHOD: Bayesian structural equation modelling was used to assess the approximate invariance of the Ruminative Response Scale, Penn State Worry Questionnaire, and the Repetitive Thinking Questionnaire across individuals with a principal diagnosis of either depressive disorder, social anxiety disorder, or generalized anxiety disorder. RESULTS: All scales demonstrated approximate measurement invariance across the three disorder groups. The depressive disorder group reported a higher level of rumination than the generalized anxiety disorder group (Δµ = 0.25, 95% Credibility Interval [0.06, 0.45]), with no difference between the generalized anxiety disorder and social anxiety disorder groups. The depressive disorder and generalized anxiety disorder groups did not differ in their levels of trait repetitive negative thinking, but the social anxiety disorder group was markedly lower than the generalized anxiety disorder group (Δµ = -0.21 [-0.37, -0.05]). Similarly, levels of worry did not differ between the generalized anxiety disorder and depressive disorder group but were lower in the social anxiety disorder group than the generalized anxiety disorder group (Δµ = -0.23 [-0.41, -0.06]). CONCLUSIONS: The Ruminative Response Scale, Penn State Worry Questionnaire, and Repetitive Thinking Questionnaire are measuring trait repetitive negative thinking in a consistent manner across individuals with a principal diagnosis of depressive disorder, social anxiety disorder, or generalized anxiety disorder. This supports their use in transdiagnostic contexts and indicates that it is appropriate to directly compare the scores on these measures between diagnostic groups.


Subject(s)
Pessimism , Humans , Bayes Theorem , Anxiety Disorders/diagnosis , Anxiety/diagnosis , Surveys and Questionnaires
10.
Int J Eat Disord ; 54(9): 1689-1695, 2021 09.
Article in English | MEDLINE | ID: mdl-34184797

ABSTRACT

BACKGROUND: The coronavirus pandemic (COVID-19) has required telehealth to be integrated into the delivery of evidence-based treatments for eating disorders in many services, but the impact of this on patient outcomes is unknown. OBJECTIVE: The present study examined the impact of the first wave of COVID-19 and rapid transition to telehealth on eating disorder symptoms in a routine clinical setting. METHOD: Participants were 25 patients with a confirmed eating disorder diagnosis who had commenced face-to-face treatment and rapidly switched to telehealth during the first wave of COVID-19 in Western Australia. Eating disorder symptoms, clinical impairment and mood were measured prospectively before and during lockdowns imposed due to COVID-19. HYPOTHESES: We predicted that patients would experience poorer treatment outcomes during COVID-19 and would perceive poorer therapeutic alliance and poorer quality of treatment compared to face-to-face therapy. RESULTS: Our hypotheses were not supported. On average, patients achieved large improvements in eating disorder symptoms and mood, and the magnitude of improvement in eating disorder symptoms was comparable to historical benchmarks at the same clinic. Patients rated the quality of treatment and therapeutic alliance highly. DISCUSSION: Providing evidence-based treatment for eating disorders via telehealth during COVID-19 lockdown is acceptable to patients and associated with positive treatment outcomes.


Subject(s)
COVID-19 , Delivery of Health Care, Integrated , Feeding and Eating Disorders , Telemedicine , COVID-19/epidemiology , Feeding and Eating Disorders/therapy , Humans , Telemedicine/organization & administration , Treatment Outcome , Western Australia/epidemiology
11.
Depress Anxiety ; 37(12): 1253-1260, 2020 12.
Article in English | MEDLINE | ID: mdl-33001532

ABSTRACT

BACKGROUND: The Bivalent Fear of Evaluation Model proposes that the fears of positive and negative evaluation each uniquely contribute to social anxiety severity. However, the debate continues as to whether these are distinct constructs, and, if so, the degree of influence each has on social anxiety severity. This study used a longitudinal evaluation of these relationships in a clinical sample to identify whether the two fears differentially change over time and differentially relate to social anxiety severity. METHODS: Individuals with a social anxiety disorder (N = 105) completed measures of fears of negative and positive evaluation weekly, and social interaction anxiety monthly, for 12 weeks. Temporal relationships were assessed using residual dynamic structural equation modeling. RESULTS: Fears of positive and negative evaluation both predicted the future status of the other (ϕ = 0.18, 95% credibility interval [0.10-0.28] and ϕ = 0.22 [0.12-0.35], respectively). Fear of negative evaluation (ϕ = 0.16 [0.05-0.28]) but not positive evaluation (ϕ < 0.01 [-0.09 to 0.10]) directly predicted future social anxiety severity. Fear of positive evaluation only indirectly predicted anxiety severity via fear of negative evaluation. CONCLUSIONS: Previous fears of negative evaluation could not fully explain future fears of positive evaluation (or vice-versa), which is consistent with the two constructs being likely distinct in social anxiety disorder. Given its more direct relationship with social anxiety severity, fear of negative evaluation should be targeted in treatment, as this could both directly reduce social anxiety severity and minimize the indirect impact of fear of positive evaluation.


Subject(s)
Phobia, Social , Anxiety/epidemiology , Fear , Humans , Models, Psychological , Phobia, Social/epidemiology , Social Interaction
12.
J Affect Disord ; 262: 108-117, 2020 02 01.
Article in English | MEDLINE | ID: mdl-31733454

ABSTRACT

BACKGROUND: Successful management of bipolar disorder (BPD) typically involves individuals undertaking a complex array of self-management tasks (e.g., taking medication, monitoring symptoms, following a regular sleep routine). Many people with BPD doubt they can successfully undertake these tasks. This low sense of self-efficacy may lead to the perpetuation of BPD symptoms, poor quality of life, and low adherence to treatment. Research on self-efficacy in BPD has been hampered by the lack of a short, reliable and valid self-report scale that is practical to use in clinical and research settings. We sought to develop such a scale. METHODS: BPD patients (N = 303) completed a new battery of items measuring their self-efficacy for performing BPD self-management tasks. Modern psychometric techniques such as bifactor analyses were used to refine the scale, determine an appropriate scoring algorithm, and establish reliability and validity. RESULTS: The Bipolar Self-Efficacy Scale (BPSES) comprises 17 items. BPSES scores were reliable, sensitive to change, and correlated with theoretically related constructs such as social adjustment and positive affect. BPSES scores had substantially higher associations with depression and quality of life than an alternative instrument that measured self-efficacy in general, rather than self-efficacy specifically related to bipolar disorder self-management. LIMITATIONS: Patients were required to be medically managed while attending adjunctive psychological treatment of BPD. CONCLUSIONS: The BPSES is a brief scale that can be used to reliably and validly measure bipolar self-efficacy. It may be fruitful to use the scale in clinical practice, and studies investigating treatment outcomes, mechanisms, and moderators.


Subject(s)
Bipolar Disorder/psychology , Psychiatric Status Rating Scales/standards , Self Efficacy , Self Report/standards , Adult , Female , Humans , Male , Middle Aged , Psychometrics , Quality of Life , Reproducibility of Results
13.
Assessment ; 26(7): 1260-1269, 2019 10.
Article in English | MEDLINE | ID: mdl-28952332

ABSTRACT

Aim: The Clinical Impairment Assessment (CIA 3.0) is the most widely used instrument assessing psychosocial impairment secondary to eating disorder symptoms. However, there is conflicting advice regarding the dimensionality and optimal method of scoring the CIA. We sought to resolve this confusion by conducting a comprehensive factor analytic study of the CIA in a community sample (N = 301) and clinical sample comprising patients with a diagnosed eating disorder (N = 209). Convergent and discriminant validity were also assessed. Method: The CIA and measures of eating disorder symptoms were administered to both samples. Results: Factor analyses indicated there is a general impairment factor underlying all items on the CIA that is reliably measured by the CIA Global score. CIA Global demonstrated good convergent and discriminant validity. Conclusions: CIA Global is a reliable and valid measure of psychosocial impairment secondary to eating disorder symptoms; however, subscale scores should not be computed.


Subject(s)
Feeding and Eating Disorders/diagnosis , Psychiatric Status Rating Scales/standards , Psychometrics/methods , Adolescent , Adult , Factor Analysis, Statistical , Female , Humans , Male , Middle Aged , Patients , Reproducibility of Results , Students , Universities , Young Adult
14.
Int J Eat Disord ; 51(12): 1373-1377, 2018 12.
Article in English | MEDLINE | ID: mdl-30584661

ABSTRACT

OBJECTIVE: Long waitlists are common in eating disorder services and can have a detrimental impact on patients. We examined the effect on waitlist length, attendance, and eating disorder symptoms, of a 75-90 min single session intervention (SSI), attended a median of 16 days after referral to a specialist eating disorders clinic. METHOD: Sequential referrals (N = 448) to a public outpatient eating disorders program were tracked from referral until a decision was made on patients entering treatment. One group ("SSI cohort") received a protocol incorporating assessment and psychoeducation about eating disorders before being placed on a waitlist, after which they received further assessment and entered treatment. Data on patient flow indices were collected from this cohort and compared to data from a "Pre-SSI" cohort who had not received the SSI. Symptom change was examined in the SSI cohort. RESULTS: Waitlist length reduced and the proportion of referrals attending assessment and being allocated to treatment increased. Eating disorder symptoms and impairment decreased. Underweight patients (Body Mass Index [BMI] < 18.5 kg/m2 ) gained weight. DISCUSSION: These findings suggest that a single session psychoeducational assessment may reduce waiting times, increase the likelihood of patients entering treatment, and facilitate early reductions in eating disorder symptoms. However, there may be other explanations for the changes observed.


Subject(s)
Feeding and Eating Disorders/psychology , Waiting Lists , Adolescent , Adult , Cohort Studies , Female , Humans , Male , Young Adult
15.
Psychother Psychosom ; 87(6): 340-349, 2018.
Article in English | MEDLINE | ID: mdl-30380535

ABSTRACT

BACKGROUND: The effectiveness of psychotherapies for social anxiety disorder (SAD) is typically evaluated using self- and clinician-reported symptom change, while biomarkers of treatment response are rarely measured. The current study aimed to compare biomarkers of response following two brief group interventions for SAD. METHODS: This randomized controlled trial evaluated the effectiveness of single-session group interventions for SAD (n = 58) - imagery rescripting (IR) and verbal restructuring (VR) versus waitlist control (WC). The IR intervention guided participants to rescript autobiographical memories through visualization whilst the VR intervention focused on thought challenging. Trial outcomes included change in psychophysiological reactivity (heart rate variability (HRV) and electrodermal responding) to social stress, and symptom-based measures (social interaction anxiety, negative self-portrayal, cognitive avoidance, repetitive negative thinking, memory modification, anxious behaviors). RESULTS: Psychophysiological reactivity was selectively attenuated following IR treatment, compared to VR and WC groups. The specific influence of the imagery-based intervention in modulating autonomic reactivity was evident across HRV parameters, including the standard deviation of intervals between heartbeats (IR vs. WC, d = 0.67, p = 0.021; IR vs. VR, d = 0.58, p = 0.041), and high frequency power - an indicator of parasympathetically mediated emotion regulation (IR vs. WC, d = 0.75, p = 0.034; IR vs. VR, d = 0.95, p = 0.006). Few group differences were observed across self-report measures. CONCLUSION: The current study highlights the specificity of brief imagery-based interventions in influencing psychophysiological reactivity in SAD and establishes the sensitivity of objective markers of treatment response in quantifying change over symptom-based measurements.


Subject(s)
Biofeedback, Psychology/methods , Imagery, Psychotherapy/methods , Phobia, Social/therapy , Adult , Female , Humans , Male , Memory, Episodic , Middle Aged , Psychiatric Status Rating Scales , Self Report , Stress, Psychological , Treatment Outcome , Western Australia , Young Adult
16.
Int J Eat Disord ; 51(10): 1176-1184, 2018 10.
Article in English | MEDLINE | ID: mdl-30230573

ABSTRACT

OBJECTIVE: Clinical perfectionism is involved in the etiology and maintenance of eating disorders. Limited research has examined the factor structure of the Clinical Perfectionism Questionnaire (CPQ) in clinical eating disorder samples. The aim of this research was to examine the validity and reliability of the CPQ in a mixed eating disorder sample. METHOD: Patients (N = 211) with an eating disorder completed the CPQ at pretreatment. A bifactor model was tested that included a general clinical perfectionism factor and two group factors; overevaluation of striving and concern over mistakes. The unique contributions that general and group factors make to the prediction of eating disorder symptoms were also investigated. Unidimensional, correlated two-factor, and bifactor models were tested using confirmatory factor analysis. RESULTS: A bifactor structure for a revised 10-item version of the CPQ provided the best fit, with a strong and reliable general clinical perfectionism factor. The general clinical perfectionism factor and the overevaluation of striving group factor explained reliable variance in the CPQ, and but only the general factor predicted eating disorder symptoms. DISCUSSION: The results suggested that a total score is generally appropriate for assessing clinical perfectionism in a clinical eating disorder sample.


Subject(s)
Feeding and Eating Disorders/epidemiology , Adolescent , Adult , Female , Humans , Male , Middle Aged , Surveys and Questionnaires , Young Adult
17.
Psychol Assess ; 30(11): 1512-1526, 2018 Nov.
Article in English | MEDLINE | ID: mdl-30070558

ABSTRACT

The Social Interaction Anxiety Scale (SIAS) and Social Phobia Scale (SPS) are 20-item companion measures of social anxiety symptoms frequently used to evaluate outcome in treatment trials. The SIAS-6, SPS-6, and Social Interaction Phobia Scale (SIPS) are promising short forms of the SIAS and SPS. The current study evaluated whether it is sound to use these short scales instead of the full-length instruments to measure outcome in social anxiety disorder (SAD) treatment studies, using data from a trial in which 255 adults with SAD were treated with traditional or imagery-enhanced group cognitive-behavioral therapy. Several deficiencies with the short forms were identified including ceiling effects, inflated variances, imprecise effect size estimates, and a loss of statistical power when testing for between-treatment differences. Using the short forms can alter the substantive findings of a treatment trial, as genuine differences in efficacy between treatments can be missed. We recommend treatment outcome be measured using the full SIAS and SPS rather than the SIPS, SIAS-6, and SPS-6. The full-length instruments provide precise estimates of treatment effects and maximize the chance of detecting between-treatment differences when they exist. (PsycINFO Database Record (c) 2018 APA, all rights reserved).


Subject(s)
Anxiety/diagnosis , Interpersonal Relations , Phobia, Social/diagnosis , Psychiatric Status Rating Scales/standards , Psychometrics/standards , Adult , Female , Humans , Male , Middle Aged , Young Adult
18.
J Consult Clin Psychol ; 86(8): 702-709, 2018 08.
Article in English | MEDLINE | ID: mdl-30035586

ABSTRACT

OBJECTIVE: The present study aimed to examine whether Anorexia Nervosa (AN) illness severity or duration is associated with retention or treatment response in outpatient, enhanced cognitive-behavioral therapy (CBT-E). METHOD: Patients with a confirmed AN diagnosis (N = 134) completed measures of eating disorder symptoms and quality of life, and had their BMI objectively measured before, during, and after treatment. We evaluated whether illness severity or duration predicted treatment outcomes, using longitudinal regression models. RESULTS: Greater levels of illness severity and duration were not associated with poorer treatment outcomes. CONCLUSIONS: Patients with more severe or long-standing AN illness did just as well in CBT-E as any other patient starting treatment. Therefore, classifying individuals as "severe and enduring" appears to lack clinical utility in CBT-E. Clinicians should continue to administer evidence-supported treatments such as CBT-E for patients with AN, regardless of duration or severity of AN illness. (PsycINFO Database Record


Subject(s)
Anorexia Nervosa/diagnosis , Cognitive Behavioral Therapy , Quality of Life/psychology , Adolescent , Adult , Anorexia Nervosa/psychology , Anorexia Nervosa/therapy , Female , Humans , Male , Severity of Illness Index , Treatment Outcome , Young Adult
19.
Behav Res Ther ; 106: 86-94, 2018 07.
Article in English | MEDLINE | ID: mdl-29779855

ABSTRACT

Pilot and open trials suggest that imagery-enhanced group cognitive behaviour therapy (CBT) is highly effective for social anxiety disorder (SAD). However, before being considered reliable and generalisable, the effects of the intervention need to be replicated by clinicians in a setting that is independent of the protocol developers. The current study compared outcomes from clients with a principal diagnosis of SAD at the Australian clinic where the protocol was developed (n = 123) to those from an independent Canadian clinic (n = 46) to investigate whether the large effects would generalise. Trainee clinicians from the independent clinic ran the groups using the treatment protocol without any input from its developers. The treatment involved 12 2-h group sessions plus a one-month follow-up. Treatment retention was comparable across both clinics (74% vs. 78%, ≥9/12 sessions) and the between-site effect size was very small and non-significant on the primary outcome (social interaction anxiety, d = 0.09, p = .752). Within-group effect sizes were very large in both settings (ds = 2.05 vs. 2.19), and a substantial minority (41%-44%) achieved clinically significant improvement at follow-up. Replication of treatment effects within an independent clinic and with trainee clinicians increases confidence that outcomes are generalisable.


Subject(s)
Cognitive Behavioral Therapy/methods , Imagery, Psychotherapy/methods , Phobia, Social/therapy , Adolescent , Adult , Female , Humans , Male , Phobia, Social/psychology , Treatment Outcome , Young Adult
20.
Contemp Clin Trials ; 60: 34-41, 2017 09.
Article in English | MEDLINE | ID: mdl-28642208

ABSTRACT

Cognitive behavior group therapy (CBGT) is effective for social anxiety disorder (SAD), but a substantial proportion of patients do not typically achieve normative functioning. Cognitive behavioral models of SAD emphasize negative self-imagery as an important maintaining factor, and evidence suggests that imagery is a powerful cognitive mode for facilitating affective change. This study will compare two group CBGT interventions, one that predominantly uses verbally-based strategies (VB-CBGT) and another that predominantly uses imagery-enhanced strategies (IE-CBGT), in terms of (a) efficacy, (b) mechanisms of change, and (c) cost-effectiveness. This study is a parallel groups (two-arm) single-blind randomized controlled trial. A minimum of 96 patients with SAD will be recruited within a public outpatient community mental health clinic in Perth, Australia. The primary outcomes will be self-reported symptom severity, caseness (SAD present: yes/no) based on a structured diagnostic interview, and clinician-rated severity and life impact. Secondary outcomes and mechanism measures include blind observer-rated use of safety behaviors, physiological activity (heart rate variability and skin conductance level) during a standardized speech task, negative self-beliefs, imagery suppression, fear of negative and positive evaluation, repetitive negative thinking, anxiety, depression, self-consciousness, use of safety behaviors, and the EQ-5D-5L and TiC-P for the health economic analysis. Homework completion, group cohesion, and working alliance will also be monitored. The outcomes of this trial will inform clinicians as to whether integrating imagery-based strategies in cognitive behavior therapy for SAD is likely to improve outcomes. Common and distinct mechanisms of change might be identified, along with relative cost-effectiveness of each intervention.


Subject(s)
Phobia, Social/therapy , Psychotherapy/methods , Australia , Behavior , Cognitive Behavioral Therapy/methods , Cost-Benefit Analysis , Female , Group Processes , Heart Rate , Humans , Imagery, Psychotherapy/methods , Male , Psychotherapy/economics , Psychotherapy, Group/methods , Research Design , Severity of Illness Index , Single-Blind Method
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