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1.
Behav Res Methods ; 56(4): 4173-4187, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38528246

ABSTRACT

Cognitive models propose that individuals with elevated vulnerability to experiencing negative emotion are characterised by biased attentional responding to negative information. Typically, methods of examining these biases have measured attention to pictures of emotional scenes, emotional faces, or rewarding or feared objects. Though these approaches have repeatedly yielded evidence of anxiety-linked biases, their measurement reliability is suggested to be poor. Recent research has shown that attentional responding to cues signalling negative information can be measured with greater reliability. However, whether such biases are associated with emotion vulnerability remains to be demonstrated. The present study conducted three experiments that recruited participants who varied in trait and state anxiety (N = 134), social anxiety (N = 122), or spider fear (N = 131) to complete an assessment of selective attention to cues signalling emotionally congruent negative information. Analyses demonstrated that anxiety and fear were associated with biased attentional responding to cues signalling negative information, and that such biases could be measured with acceptable reliability (rsplit-half = .69-.81). Implications for research on the relation between emotion and attention are discussed.


Subject(s)
Anxiety , Attentional Bias , Cues , Fear , Humans , Female , Attentional Bias/physiology , Male , Anxiety/psychology , Young Adult , Fear/psychology , Adult , Emotions/physiology , Reproducibility of Results , Adolescent , Attention/physiology , Facial Expression
3.
J Behav Ther Exp Psychiatry ; 83: 101937, 2024 06.
Article in English | MEDLINE | ID: mdl-38134620

ABSTRACT

BACKGROUND AND OBJECTIVES: Following engagement in a social event people with heightened vulnerability to social anxiety report elevated levels of negative thinking about the event, and this post-event negative thinking is implicated in the maintenance of social anxiety vulnerability. It has also been established that heightened social anxiety vulnerability is associated with disproportionately negative expectations of upcoming social events. However, contribution of social anxiety-linked pre-event negative expectancy to post-event negative thinking has not been directly investigated. The objective of the present study was to test the hypothesis that the relationship between social anxiety vulnerability and post-event negative thinking is mediated by pre-event negative expectancies that drive increased state anxiety at the time of encountering the event. METHODS: One-hundred and ten participants who varied in social anxiety vulnerability completed a simulated job interview. Participants reported negativity of expectancies before the event, state anxiety experienced at the time of encountering the event, and post-event negative thinking across the seven days following the event. RESULTS: Analyses revealed elevated social anxiety predicted increased negative post-event thinking. The association between social anxiety and post-event negative thinking was fully mediated by a mediation pathway involving pre-event negative expectancies and state anxiety at the time of encountering the interview event. LIMITATIONS: The study used a laboratory-based social experience, and conclusions could usefully be tested in the context of natural social events. CONCLUSIONS: The findings suggest that social anxiety-linked variation in pre-event negative expectancy may contribute to post-event negative thinking following a social event via its impact on state anxiety.


Subject(s)
Pessimism , Humans , Thinking , Anxiety , Fear , Anxiety Disorders
4.
Body Image ; 46: 443-448, 2023 Sep.
Article in English | MEDLINE | ID: mdl-37582317

ABSTRACT

It has been widely hypothesised that elevated body dissatisfaction is characterised by a biased pattern of attentional selectivity that reflects increased attention to stimuli portraying the thin-ideal. Empirical evidence in support of this notion, however, has been inconsistent. The current study aimed to examine the potential moderating role of attentional control in the association between body dissatisfaction and selective attentional responding to thin-ideal bodies. Female undergraduate students (N = 232) completed a self-report measure of body dissatisfaction followed by performance-based measures of attentional control and selective attention. Results provided support for the moderating role of attentional control. Specifically, a positive association between body dissatisfaction and biased selective attention towards thin-ideal bodies was evident only amongst individuals with relatively low levels of attentional control. A general association between body dissatisfaction and selective attention was not observed. These findings may explain previous inconsistent findings and highlight the importance of considering the potential role of attentional control in the expression of body dissatisfaction-linked attentional responding to thin-ideal bodies.


Subject(s)
Attentional Bias , Body Dissatisfaction , Humans , Female , Body Image/psychology , Students
5.
J Behav Ther Exp Psychiatry ; 81: 101894, 2023 12.
Article in English | MEDLINE | ID: mdl-37499564

ABSTRACT

BACKGROUND AND OBJECTIVES: Research shows that individuals with heightened trait anxiety are more likely to experience intrusions; however, the mechanism that accounts for this relationship is unclear. Two alternative hypotheses were tested to determine the nature of the associations between trait anxiety, attentional bias to negative information, and intrusion vulnerability. METHODS: Intrusions were elicited using the trauma film paradigm, and post-event attentional bias to negative information was assessed using the dot-probe task. Participants then completed a week-long intrusions diary. RESULTS: Results showed that attentional bias to negative information mediated the effect of heightened trait anxiety on elevated intrusion frequency. It was also revealed that heightened trait anxiety was associated with elevated intrusion-related distress, though attentional bias to negative information did not mediate this relationship. LIMITATIONS: Our sample was comprised of undergraduate students who were not selected based on a previous pathology. Replication in clinical samples is warranted. CONCLUSIONS: These findings provide new insight regarding individual differences in the experience of intrusions and suggest that both the frequency and distress associated with intrusions could represent clinical targets.


Subject(s)
Attentional Bias , Humans , Attention , Anxiety/psychology , Anxiety Disorders/psychology , Motion Pictures
6.
Behav Res Methods ; 55(1): 135-142, 2023 01.
Article in English | MEDLINE | ID: mdl-35292933

ABSTRACT

Contemporary cognitive theories of anxiety and attention processing propose that heightened levels of anxiety vulnerability are associated with a decreasing ability to inhibit the allocation of attention towards task-irrelevant information. Existing performance-based research has most often used eye-movement assessment variants of the antisaccade paradigm to demonstrate such effects. Critically, however, eye-movement assessment methods are limited by expense, the need for expert training in administration, and limited mobility and scalability. These barriers have likely led to researchers' use of suboptimal methods of assessing the relationship between attentional control and anxiety vulnerability. The present study examined the capacity for a non-eye-movement-based variant of the antisaccade task, the masked-target antisaccade task (Guitton et al., 1985), to detect anxiety-linked differences in attentional control. Participants (N = 342) completed an assessment of anxiety vulnerability and performed the masked-target antisaccade task in an online assessment session. Greater levels of anxiety vulnerability predicted poorer performance on the task, consistent with findings observed from eye-movement methods and with cognitive theories of anxiety and attention processing. Results also revealed the task to have high internal reliability. Our findings indicate that the masked-target antisaccade task provides a psychometrically reliable, low-cost, mobile, and scalable assessment of anxiety-linked differences in attentional control.


Subject(s)
Eye-Tracking Technology , Saccades , Humans , Reproducibility of Results , Anxiety/psychology , Attention
7.
Q J Exp Psychol (Hove) ; 76(2): 221-230, 2023 Feb.
Article in English | MEDLINE | ID: mdl-35187988

ABSTRACT

Individual differences in the ability to control visual attention, often termed "attentional control," have been of particular interest to cognitive researchers. This has led to the development of numerous tasks intended to measure attentional control, including the antisaccade task. While attentional performance on the antisaccade task is typically indexed through the recording of eye movements, increasingly researchers are reporting the use of probe-based methods of indexing attentional performance on the task. Critically, no research has yet determined the convergence of measures yielded by each of these assessment methods, nor compared the reliability of these measures. The purpose of the present study was to examine whether antisaccade cost measures yielded by a probe-based adaptation of the task converge with antisaccade cost measures yielded by an eye movement task in the sample of individuals, and whether these alternative approaches have comparable levels of psychometric reliability. Ninety-three individuals completed an eye movement task and a probe-based task at two assessment times, and an index of antisaccade cost was computed from each task at each assessment time. Analyses revealed that the antisaccade cost index yielded by each task demonstrated high internal reliability (eye-movement, rSB = .92; probe-based, rSB = .80-.84) and high test-retest reliability (eye-movement, rSB = .82; probe-based, rSB = .72), but modest measurement convergence (r = .21-.35). Findings suggest that probe-based and eye-movement based antisaccade tasks measure shared variance in attentional control, although their measures do not converge strongly enough to be considered equivalent measures of attentional control.


Subject(s)
Eye Movements , Saccades , Humans , Reproducibility of Results , Eye Movement Measurements
8.
Q J Exp Psychol (Hove) ; 76(5): 968-978, 2023 May.
Article in English | MEDLINE | ID: mdl-35658700

ABSTRACT

Theories of motivation posit that people will more readily approach positive or appetitive stimuli, and there has been growing interest in the relationship between biases in approach and avoidance behaviours for food cues and food craving and consumption behaviour. Two paradigms commonly employed by research to investigate this relationship are the approach-avoidance task (AAT) and the stimulus-response compatibility task (SRCT). However, it is yet to be determined whether the measures yielded by these tasks reflect the same processes operating in the food craving and consumption domain. The present study examined the internal reliability and convergence of AAT and SRCT paradigms in their assessment of biased approach to unhealthy compared with healthy food stimuli, and whether the measures yielded by the AAT and SRCT paradigms demonstrated associations with individual differences in food craving and eating behaviour. One hundred twenty-one participants completed an SRCT, an AAT using an arm movement response mode, and an AAT using a key-press response mode. The measures yielded comparable and acceptable levels of internal consistency, but convergence between the different task bias scores was modest or absent, and only approach bias as measured with the AAT task using an arm movement response mode was associated with self-report measures of eating behaviour and trait food craving. Thus, tasks did not converge strongly enough to be considered equivalent measures of approach/avoidance biases, and the AAT task using an arm movement response seems uniquely suited to detect approach biases argued to characterise maladaptive eating behaviour and craving.


Subject(s)
Craving , Food , Humans , Reproducibility of Results , Cues , Bias
9.
Sci Rep ; 12(1): 7155, 2022 05 03.
Article in English | MEDLINE | ID: mdl-35504984

ABSTRACT

Loneliness is a subjectively perceived state of social isolation that is associated with negative emotional, cognitive, and physical health outcomes. Physical distancing and shelter-in-place public health responses designed to curb COVID-19 transmission has led to concerns over elevated risk of loneliness. Given that physical isolation does not necessitate social isolation in the age of digital communication, this study investigated the relationship between the frequency of social interaction and loneliness over a two-week period in people engaging in physical distancing and examined whether this relationship was moderated by physical isolation level, age, or depression. A self-selected sample of N = 469 individuals across Australia who were engaged in physically distanced living completed daily surveys for 14-days during April to June of 2020. Multilevel modelling showed that more frequent social interaction with close, but not intermediate or distant contacts, was uniquely associated with lower loneliness. In addition, being younger, more depressed, more anxious, or having a mental health condition diagnosis (past or present) were also independently associated with higher loneliness. Critically, depression was the only significant moderator of the relationship between social interaction and loneliness over time, where more frequent social interaction with close contacts buffered against loneliness over time in high depression individuals only. The findings suggest that encouraging social activity with close contacts may promote resilience against loneliness in individuals with elevated depression symptoms.


Subject(s)
COVID-19 , Loneliness , COVID-19/epidemiology , Humans , Loneliness/psychology , Pandemics , Social Behavior , Social Isolation
10.
Behav Res Ther ; 151: 104052, 2022 04.
Article in English | MEDLINE | ID: mdl-35149426

ABSTRACT

Researchers have demonstrated that individuals with heightened levels of spider-fear, as compared to relatively lower levels of spider-fear, are characterised a pattern of action tendencies that facilitates the speed to complete 'avoidance' movements, as compared to 'approach movements, in the face of spider-stimuli. However, research has not determined whether such tendencies are able to be manipulated, and the impact of their manipulation, in individuals with heightened spider-fear. Seventy-one participants who reported relatively high levels of spider-fear completed an action tendency manipulation procedure. The procedure was designed to attenuate avoidance action tendencies, by repeatedly requiring completion of approach actions in response to images of spiders (Approach Spider Condition), or to have no impact on action tendencies (Control Condition). Participants completed an assessment of approach and avoidance action tendencies to images of spiders and butterflies, and rated the unpleasantness and disgust of images of spiders and butterflies, before and after completion of the manipulation procedure. Analyses revealed that avoidance action tendencies to spider stimuli were attenuated in the Approach Spider Condition as compared to the Control Condition as intended. However, conditions did not differ in the evaluation of spider stimuli following the manipulation procedure. The findings demonstrate that avoidance action tendencies to spider stimuli can be manipulated amongst individuals with heightened spider-fear, though their manipulation does not lead to change in explicit evaluation of spider stimuli. The implications of these findings and avenues for future research are discussed.


Subject(s)
Butterflies , Disgust , Phobic Disorders , Spiders , Animals , Fear/physiology , Humans
11.
Cogn Emot ; 35(7): 1440-1446, 2021 11.
Article in English | MEDLINE | ID: mdl-34379032

ABSTRACT

Cognitive theories of social anxiety implicate greater attention to negative social information in the development and maintenance of heightened social anxiety. Empirical evidence for this proposal, however, has been inconsistent. The aim of the current study was to examine the role of attentional control, which is one's ability to deploy attention to goal-relevant information as a potential moderator of the association between selective attentional responding to negative social information and social anxiety. Eighty-nine adults were recruited through Mechanical Turk platform and completed the Social Interaction Anxiety Scale as well as a novel paradigm designed to measure selective attentional responding to negative social information (angry faces) and attentional control. Attentional control was operationalised as the capacity to direct attention to the specified target stimuli. The results supported the hypothesis that attentional control plays this moderating role. Specifically, while participants with low levels of attentional control exhibited a positive association between social anxiety and selective attentional responding to negative social information, this association was eliminated among participants with high levels of attentional control. This finding may explain the heterogeneity of research findings in this area. Implications, limitations and directions for future research are discussed.


Subject(s)
Anxiety , Fear , Adult , Humans
12.
J Behav Ther Exp Psychiatry ; 70: 101612, 2021 03.
Article in English | MEDLINE | ID: mdl-32920172

ABSTRACT

BACKGROUND AND OBJECTIVES: Approaching the thin-ideal and avoiding the stigma of fatness are motivational tendencies resulting from the internalisation of sociocultural appearance norms. Individual differences in subclinical levels of eating disorder symptomatology may be related to variation in motivational tendencies regarding thin vs. non-thin bodies. METHODS: To empirically investigate this hypothesis, the current study employed a novel touchscreen approach-avoidance task with the capacity to effectively simulate compatible approach-avoidance movements. Eighty-four undergraduate females pulled closer or pushed away images depicting either bodies or objects, in response to weight category (underweight bodies vs. overweight bodies) and object category (kitchen items vs. office tools), by means of arm movements. RESULTS: Unexpectedly, results revealed relatively faster approach of overweight bodies and relatively faster avoidance of underweight bodies. Moreover, speeded approach towards overweight bodies, relative to underweight bodies, correlated positively with elevated eating disorder symptomatology. LIMITATIONS: The current sample was restricted to undergraduate women. CONCLUSIONS: The current study provides initial evidence for the utility of a touchscreen-based measure of approach-avoidance tendencies in body image, albeit comparison with other bias assessments would be necessary. Moreover, our findings suggest that a greater tendency to approach overweight bodies is associated with elevated eating disorder symptomatology. Future extensions of the current work are necessary to clarify the function of motivational tendencies in the body image context.


Subject(s)
Body Image/psychology , Feeding and Eating Disorders/psychology , Adolescent , Adult , Female , Humans , Middle Aged , Motivation , Overweight/psychology , Prejudice , Thinness/psychology , Young Adult
13.
Behav Res Ther ; 135: 103751, 2020 12.
Article in English | MEDLINE | ID: mdl-33070010

ABSTRACT

The present study examined the underlying role of attention control and response time variability in explaining the relationship between anxiety and two commonly computed measures of attention bias variability: 'moving average' and 'trial-level bias score' measures. Participants (final n = 195) completed measures of anxiety symptomatology, antisaccade performance (attention control), a stand-alone measure of response-time variability, and a probe task measure of attention bias. Average bias and moving average bias variability measures both recorded significant, but low split-half reliability. Both attention bias variability measures and average attention bias were associated with anxiety, and attention control. Both attention bias variability measures correlated with response time variability. Neither attention bias variability measure correlated with average attention bias. Attention control was the single significant mediator of the relationship between anxiety and the trial-level bias score measure of attention bias variability. Neither response time variability nor attention control significantly mediated the relationship between anxiety and the moving average measure of attention bias variability. No evidence was found for the mediating role of response time variability. The present findings suggest that the relationships observed between anxiety and the trial-level bias score measure of attention bias variability in particular may be attributable to the over-arching role of attention control.


Subject(s)
Anxiety/psychology , Attentional Bias , Adolescent , Adult , Attention , Female , Humans , Male , Reaction Time , Young Adult
14.
J Affect Disord ; 267: 191-202, 2020 04 15.
Article in English | MEDLINE | ID: mdl-32217219

ABSTRACT

BACKGROUND: Positive reappraisal and distancing are two distinct cognitive reappraisal strategies for emotion regulation. Critically however, research examining the impact of elevated trait anxiety on cognitive reappraisal has often conflated these strategies. Thus, the present study investigated whether high-trait-anxious (HTA) women can effectively utilize positive reappraisal and distancing to regulate emotional responses to negative stimuli. METHODS: Twenty-six HTA women and twenty-seven low-trait-anxious (LTA) women were investigated in a self-generated reappraisal paradigm. Subjective measures of emotional regulation and event-related potentials (ERPs) were recorded while participants were instructed to passively view neutral or negative pictures, or to reinterpret negative pictures in a positive way (positive reappraisal) or a detached and unemotional way (distancing). RESULTS: HTA women, as compared to LTA women, reported smaller reductions in negative affect after positive reappraisal and smaller reductions in emotional arousal after distancing. Though ERP data did not reveal corresponding differences in the centro-parietal late positive potential during emotion regulation, data did reveal HTA women exhibited enhanced recruitment of cognitive control during positive reappraisal and greater preparatory processing before engaging in distancing. LIMITATIONS: Future research should examine the generalizability of the present results in clinical anxiety individuals, male sample and other reappraisal strategies. CONCLUSIONS: Overall, HTA women appeared to recruit more cortical resources, suggestive of compensatory mechanisms, to achieve a similar performance as LTA women when engaging in positive reappraisal and distancing strategies to regulate negative emotions. Therefore, the findings demonstrate that HTA women are characterized by the inefficient implementation of positive reappraisal and distancing strategies.


Subject(s)
Anxiety , Emotions , Arousal , Cognition , Emotional Regulation , Evoked Potentials , Female , Humans , Male
15.
Psychol Med ; 50(15): 2514-2525, 2020 11.
Article in English | MEDLINE | ID: mdl-31544719

ABSTRACT

BACKGROUND: Although efficacious treatments for major depression are available, efficacy is suboptimal and recurrence is common. Effective preventive strategies could reduce disability associated with the disorder, but current options are limited. Cognitive bias modification (CBM) is a novel and safe intervention that attenuates biases associated with depression. This study investigated whether the delivery of a CBM programme designed to attenuate negative cognitive biases over a period of 1 year would decrease the incidence of major depression among adults with subthreshold symptoms of depression. METHODS: Randomised double-blind controlled trial delivered an active CBM intervention or a control intervention over 52 weeks. Two hundred and two community-dwelling adults who reported subthreshold levels of depression were randomised (100 intervention, 102 control). The primary outcome of interest was the incidence of major depressive episode assessed at 11, 27 and 52 weeks. Secondary outcomes included onset of clinically significant symptoms of depression, change in severity of depression symptoms and change in cognitive biases. RESULTS: Adherence to the interventions was modest though did not differ between conditions. Incidence of major depressive episodes was low. Conditions did not differ in the incidence of major depressive episodes. Likewise, conditions did not differ in the incidence of clinically significant levels of depression, change in the severity of depression symptoms or change in cognitive biases. CONCLUSIONS: Active CBM intervention did not decrease the incidence of major depressive episodes as compared to a control intervention. However, adherence to the intervention programme was modest and the programme failed to modify the expected mechanism of action.


Subject(s)
Cognition , Cognitive Behavioral Therapy/methods , Depressive Disorder, Major/epidemiology , Aged , Depressive Disorder, Major/prevention & control , Double-Blind Method , Female , Humans , Independent Living , Male , Middle Aged , Psychiatric Status Rating Scales , Sample Size , Treatment Outcome
16.
PLoS One ; 13(10): e0205720, 2018.
Article in English | MEDLINE | ID: mdl-30325947

ABSTRACT

Theorists have proposed that heightened anxiety vulnerability is characterised by reduced attentional control performance and have made the prediction in turn that elevating cognitive load will adversely impact attentional control performance for high anxious individuals to a greater degree than low anxious individuals. Critically however, existing attempts to test this prediction have been limited in their methodology and have presented inconsistent findings. Using a methodology capable of overcoming the limitations of previous research, the present study sought to investigate the effect of manipulating cognitive load on inhibitory attentional control performance of high anxious and low anxious individuals. High and low trait anxious participants completed an antisaccade task, requiring the execution of prosaccades towards, or antisaccades away from, emotionally toned stimuli while eye movements were recorded. Participants completed the antisaccade task under conditions that concurrently imposed a lesser cognitive load, or greater cognitive load. Analysis of participants' saccade latencies revealed high trait anxious participants demonstrated generally poorer inhibitory attentional control performance as compared to low trait anxious participants. Furthermore, conditions imposing greater cognitive load, as compared to lesser cognitive load, resulted in enhanced inhibitory attentional control performance across participants generally. Crucially however, analyses did not reveal an effect of cognitive load condition on anxiety-linked differences in inhibitory attentional control performance, indicating that elevating cognitive load did not adversely impact attentional control performance for high anxious individuals to a greater degree than low anxious individuals. Hence, the present findings are inconsistent with predictions made by some theorists and are in contrast to the findings of earlier investigations. These findings further highlight the need for research into the relationship between anxiety, attentional control, and cognitive load.


Subject(s)
Anxiety/psychology , Attention , Cognition , Eye Movements , Adolescent , Eye Movement Measurements , Female , Humans , Inhibition, Psychological , Male , Psychological Tests , Saccades
17.
Behav Res Ther ; 99: 117-123, 2017 Dec.
Article in English | MEDLINE | ID: mdl-29045856

ABSTRACT

Researchers have proposed that high spider-fearful individuals are characterised by heightened attentional vigilance to spider stimuli, as compared to low spider-fearful individuals. However, these findings have arisen from methodologies that have uniformly employed only static stimuli. Such findings do not inform upon the patterns of fear-linked attentional selectivity that occur in the face of moving feared stimuli. Hence, the present study developed a novel methodology designed to examine the influence of stimulus movement on attentional vigilance to spider and non-spider stimuli. Eighty participants who varied in level of spider-fear completed an attentional-probe task that presented stimuli under two conditions. One condition presented stimuli that displayed an approaching movement, while the other condition presented stimuli that displayed a receding movement. Fear-linked heightened attentional vigilance was observed exclusively under the latter condition. These findings suggest that fear-linked attentional vigilance to spider stimuli does not represent a uniform characteristic of heightened spider-fear, but rather is influenced by stimulus context. The means by which these findings inform understanding of attentional mechanisms that characterise heightened spider-fear, and avenues for future research, are discussed.


Subject(s)
Arousal/physiology , Attention/physiology , Fear , Individuality , Movement , Photic Stimulation/methods , Spiders , Adolescent , Animals , Female , Humans , Male , Phobic Disorders/physiopathology , Phobic Disorders/psychology , Young Adult
18.
Behav Res Ther ; 99: 47-56, 2017 Dec.
Article in English | MEDLINE | ID: mdl-28917715

ABSTRACT

Procedures that effectively modify attentional bias to negative information have been examined for their potential to be a source of therapeutic change in emotional vulnerability. However, the degree to which these procedures modify attentional bias is subject to individual differences. This generates the need to understand the mechanisms that influence attentional bias change across individuals. The present study investigated the association between individual differences in attentional control and individual differences in the magnitude of bias change evoked by an attentional bias modification procedure. The findings demonstrate that individual differences in two facets of attentional control, control of attentional inhibition and control of attentional selectivity, were positively associated with individual differences in the magnitude of attentional bias change. The present findings inform upon the cognitive mechanisms underpinning change in attentional bias, and identify a target cognitive process for research seeking to enhance the therapeutic effectiveness of attentional bias modification procedures.


Subject(s)
Anxiety/therapy , Attentional Bias , Inhibition, Psychological , Psychotherapy/methods , Adult , Emotions , Female , Goals , Humans , Individuality , Male , Young Adult
19.
J Psychiatr Res ; 93: 12-19, 2017 10.
Article in English | MEDLINE | ID: mdl-28554079

ABSTRACT

Transcranial direct current stimulation (tDCS) is a neuromodulatory technique which has garnered recent interest in the potential treatment for emotion-based psychopathology. While accumulating evidence suggests that tDCS may attenuate emotional vulnerability, critically, little is known about underlying mechanisms of this effect. The present study sought to clarify this by examining the possibility that tDCS may affect emotional vulnerability via its capacity to modulate attentional bias towards threatening information. Fifty healthy participants were randomly assigned to receive either anodal tDCS (2 mA/min) stimulation to the left dorsolateral prefrontal cortex (DLPFC), or sham. Participants were then eye tracked during a dual-video stressor task designed to elicit emotional reactivity, while providing a concurrent in-vivo measure of attentional bias. Greater attentional bias towards threatening information was associated with greater emotional reactivity to the stressor task. Furthermore, the active tDCS group showed reduced attentional bias to threat, compared to the sham group. Importantly, attentional bias was found to statistically mediate the effect of tDCS on emotional reactivity, while no direct effect of tDCS on emotional reactivity was observed. The findings are consistent with the notion that the effect of tDCS on emotional vulnerability may be mediated by changes in attentional bias, holding implications for the application of tDCS in emotion-based psychopathology. The findings also highlight the utility of in-vivo eye tracking measures in the examination of the mechanisms associated with DLPFC neuromodulation in emotional vulnerability.


Subject(s)
Attentional Bias/physiology , Emotions/physiology , Stress, Psychological/therapy , Transcranial Direct Current Stimulation/methods , Adolescent , Attention/physiology , Female , Humans , Male , Photic Stimulation/adverse effects , Prefrontal Cortex/physiology , Stress, Psychological/etiology , Surveys and Questionnaires , Young Adult
20.
Cogn Emot ; 31(3): 538-551, 2017 04.
Article in English | MEDLINE | ID: mdl-26823009

ABSTRACT

Heightened anxiety vulnerability is characterised by an attentional bias that favours the processing of negative information. However, this anxiety-linked attentional bias is amenable to two quite different explanations. One possibility is that it reflects anxiety-linked bias in the setting of attentional goals that favours setting the goal of attending towards negative information over the alternative goal of attending away from such information. Another possibility is that it reflects anxiety-linked bias in the execution of attentional goals that enhances the execution of the former attentional goal compared to the latter. The present study introduces a novel methodology designed to discriminate the validity of these competing hypotheses, by examining anxiety-linked attentional bias under two conditions. One condition left attentional goals unconstrained. The other condition imposed the attentional goal of either attending towards more negative or more benign emotional stimuli. The finding that anxiety-linked attentional bias was observed only under the former condition supported the hypothesis that anxiety is characterised by a bias favouring the setting attentional goals involving vigilance rather than avoidance of negative information, while giving no support to the hypothesis that anxiety is characterised by a bias reflecting enhanced execution of the former attentional goal compared to the latter.


Subject(s)
Anxiety/psychology , Attentional Bias , Fear/psychology , Goals , Adolescent , Emotions , Female , Humans , Male , Personality Inventory , Young Adult
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