Age Moderates Link Between Training Effects and Treatment Response to Attention Bias Modification Treatment for Social Anxiety Disorder.

Attention bias modification treatment (ABMT) aims to reduce anxiety symptoms via practice on computerized attention training tasks. Despite evidence of efficacy, clinical effects appear heterogeneous. More research on ABMT mechanisms and moderators of treatment response is needed. Age is one potentially important moderator, as developmental differences in training effects may impact response. We examined developmental links between ABMT training effects and response in social anxiety disorder (SAD). We pooled data from two randomized controlled trials in treatment-seeking youths and adults with SAD (N = 99) that used identical ABMT methods. We first characterized learning effects associated with the eight-session ABMT training protocol. We then tested whether learning magnitude predicted the clinical (change in SAD symptoms) and cognitive (change in attention bias) responses to treatment. Finally, we tested whether age moderated the association between ABMT learning and treatment response. Results indicate that ABMT was associated with an incremental learning curve during the protocol, and that learning improved with age. Age further moderated the association between learning gains during the ABMT protocol and subsequent reduction in self-reported SAD symptoms, such that this association was stronger with age. These effects were not evident in bias scores or clinician ratings. Finally, pre-treatment SAD symptoms and bias scores predicted ABMT learning gains. This study highlights the links among age, learning processes, and clinical response to ABMT. These insights may inform attempts to increase the clinical efficacy of ABMT for anxiety.

Attention bias modification for youth with social anxiety disorder.

BACKGROUND: Attention bias modification treatment (ABMT) targets threat-related attention biases in anxiety disorders. Most clinical trials of ABMT have focused on adults or small samples of youth. The current randomized controlled trial (RCT) examines ABMT efficacy in youth with social anxiety disorder (SAD) and tests possible moderators of treatment outcomes. METHOD: Sixty-seven youth with SAD were randomly assigned to ABMT or attention control training (ACT) conditions. Anxiety severity was measured at baseline, posttreatment, and 3-month follow-up. ClinicalTrials.gov name and identifier: Attention bias modification treatment for children with social anxiety, NCT01397032; http://www.clinicaltrials.gov. RESULTS: Both ABMT and ACT induced significant reductions in clinician and self-rated social anxiety (ps < .001). An additional reduction was observed at the 3-month follow-up in clinician-rated anxiety symptoms (p = .03). Moderation effects were nonsignificant for the clinician-rated anxiety outcome, but age moderated self-reported anxiety. Older but not younger children, showed significant reduction in anxiety following ABMT relative to ACT (p < .001). Individual differences in attention control also moderated ABMT's effect on self-reported anxiety (p = .05). Children rated by their parents as lower on attention control benefited more from ABMT than those rated higher on attention control. Baseline attention bias did not moderate anxiety (p = .17). CONCLUSIONS: Despite significant reductions in social anxiety, no specific evidence for ABMT was found relative to a control condition. Age and attention control moderated ABMT effects on self-reported SAD symptoms, with clinical effects for older relative to younger children and for those with lower attention control. These results highlight the need to consider developmental influences in the implementation of ABMT protocols.

Quantitative evaluation of the clinical efficacy of attention bias modification treatment for anxiety disorders.

BACKGROUND: Attention bias modification treatment (ABMT) is a novel treatment for anxiety disorders. Although a number of other meta-analytic reviews exist, the purpose of the present meta-analysis is to examine issues unaddressed in prior reviews. Specifically, the review estimates the efficacy of ABMT in clinically anxious patients and examines the effect of delivery context (clinic vs. home) on symptom reduction. METHODS: A literature search using PsychInfo and Web of Science databases was performed. Only randomized controlled trials (RCTs) examining dot-probe-based ABMT in clinically diagnosed anxious patients were included. From 714 articles located through the search, 36 ABMT studies were identified and 11 studies met inclusion criteria (N = 589 patients). RESULTS: ABMT was associated with greater clinician-rated reductions in anxiety symptoms relative to control training: between-groups effect (d = 0.42, P = .001, confidence interval (CI) = 0.18-0.66), contrast of within-group effects (Q = 7.25, P < .01). More patients in the treatment group no longer met formal diagnostic criteria for their anxiety disorder posttreatment relative to patients in the control condition (P < .05). Analyses of patients' self-reported anxiety were nonsignificant for the between-groups contrast (P = .35), and were at a trend level of significance for the contrast between the within-group effects (P = .06). Moderation analysis of the between-groups effect revealed a significant effect for ABMT delivered in the clinic (d = 0.34, P = 0.01, CI = 0.07-0.62), and a nonsignificant effect for ABMT delivered at home (d = -0.10, P = 0.40, CI = -0.33-0.13). CONCLUSIONS: The current meta-analysis provides support for ABMT as a novel evidenced-based treatment for anxiety disorders. Overall, ABMT effects are mainly evident when it is delivered in the clinic and when clinical outcome is evaluated by a clinician. More RCTs of ABMT in specific anxiety disorders are warranted.

Content specificity of attention bias to threat in anxiety disorders: a meta-analysis.

Despite the established evidence for threat-related attention bias in anxiety, the mechanisms underlying this bias remain unclear. One important unresolved question is whether disorder-congruent threats capture attention to a greater extent than do more general or disorder-incongruent threat stimuli. Evidence for attention bias specificity in anxiety would implicate involvement of previous learning and memory processes in threat-related attention bias, whereas lack of content specificity would point to perturbations in more generic attention processes. Enhanced clarity of mechanism could have clinical implications for the stimuli types used in Attention Bias Modification Treatments (ABMT). Content specificity of threat-related attention bias in anxiety and potential moderators of this effect were investigated. A systematic search identified 37 samples from 29 articles (N=866). Relevant data were extracted based on specific coding rules, and Cohen's d effect size was used to estimate bias specificity effects. The results indicate greater attention bias toward disorder-congruent relative to disorder-incongruent threat stimuli (d=0.28, p<0.0001). This effect was not moderated by age, type of anxiety disorder, visual attention tasks, or type of disorder-incongruent stimuli. No evidence of publication bias was observed. Implications for threat bias in anxiety and ABMT are discussed.

Variations in the promoter region of the serotonin transporter gene and biased attention for emotional information: a meta-analysis.

BACKGROUND: Selective attention to negative information has been strongly implicated in the etiology and maintenance of anxiety and offered as a potential intermediate phenotype for anxiety disorders. Attention biases have been studied in relation to a polymorphism in the promoter region of the serotonin transporter gene (5-HTTLPR) offering equivocal findings. The present meta-analysis tested whether the extant published data support the notion that variation in the 5-HTTLPR genotype modulates selective attention to negative information. METHODS: Eleven relevant samples from 10 published articles were identified through a systematic literature search (total n = 807). Relevant attention bias and 5-HTTLPR data were extracted based on specific coding rules, and Cohen's d effect size index was used to calculate all outcome measures. Publication bias was assessed using various methods. RESULTS: Carriers of the low (SS, SL(G), L(G)L(G)) transmission efficacy genotype display attentional vigilance toward negatively valenced stimuli, a pattern not found in the intermediate (SL(A), L(A)L(G)) and high (L(A)L(A)) efficacy genotypes. This phenomenon emerges as of medium effect size. CONCLUSIONS: The meta-analysis supports the notion that allele variants of the 5-HTTLPR are associated with selective attention to negative stimuli. More studies are needed to fully establish the consistency of this effect. Future studies applying systematic attention bias modification may shed further light on the role of 5-HTTLPR in the development of anxiety disorders and in the prediction of clinical response to attention bias modification treatments.