High Trait Anxious Individuals Research Articles

Slow Is Also Fast: Feedback Delay Affects Anxiety and Outcome Evaluation.

Performance-related feedback plays an important role in improving human being’s adaptive behavior. Using event-related potentials (ERPs), previous studies have associated a particular component, i.e., reward positivity (RewP), with outcome evaluation processing and found that this component was affected by waiting time before outcome evaluation. Prior research has also suggested that anxious individuals are more prone to detecting threats and susceptible to negative emotions, and show different patterns of brain activity in outcome evaluation. It is quite common that a decision-maker cannot receive feedback immediately; however, few studies have focused on the processing of delayed feedback, especially in subjects who exhibit trait anxiety. In this study, we recruited two groups of subjects with different trait anxiety levels and recorded ERPs when they conducted a time-estimation task with short (0.6–1 s) or long delayed (4–5 s) feedback. The ERP results during the cue phase showed that long waiting cues elicited more negative-going feedback-related negativity (FRN)-like component than short waiting cues in the high trait anxiety (HTA) group. More importantly, the two groups showed different patterns of ERP in the feedback condition. In the low trait anxiety (LTA) group, more positive-going RewP was found in the short-delayed than in the long-delayed condition. In contrast, no difference was found in the HTA group. This pattern may reflect the hyperactivity of the reward systems of HTA individuals in uncertain environments (e.g., the long-delay condition) compared with LTA individuals. Our results provide a direction for future research on the neural mechanisms of reinforcement learning and anxiety.

Alpha band frequency differences between low-trait and high-trait anxious individuals.

Trait anxiety has been shown to cause significant impairments on attentional tasks. Current research has identified alpha band frequency differences between low-trait and high-trait anxious individuals. Here, we further investigated the underlying alpha band frequency differences between low-trait and high-trait anxious individuals during their resting state and the completion of an inhibition executive functioning task. Using human participants and quantitative electroencephalographic recordings, we measured alpha band frequency in individuals both high and low in trait anxiety during their resting state, and while they completed an Eriksen Flanker Task. Results indicated that high-trait anxious individuals exhibit a desynchronization in alpha band frequency from a resting state to when they complete the Eriksen Flanker Task. This suggests that high-trait anxious individuals maintain fewer attentional resources at rest and must martial resources for task performance as compared with low-trait anxious individuals, who appear to maintain stable cognitive resources between rest and task performance. These findings add to the cognitive neuroscience literature surrounding the role of alpha band frequency in low-trait and high-trait anxious individuals.

The impact of pre-existing anxiety on affective and cognitive processing of a Virtual Reality analogue trauma.

Dysfunctional processing of traumatic events may be in particular related to high trait anxiety as a pre-traumatic risk factor for the development of post-traumatic stress disorder (PTSD). However, as this has rarely been investigated in prospective, experimental studies, we aimed to analyse the association between high trait anxiety and affective as well as cognitive processing of stress using a new prospective Virtual Reality analogue trauma paradigm to overcome limitations of retrospective or current analogue designs. Individuals with high and low trait anxiety (N = 80) were exposed to a multi-sensory Virtual Reality emergency scenario while psychophysiological stress response, emotion regulation and intrusive memories were assessed. Our results showed that high trait anxiety individuals display increased (i) subjective stress responses, (ii) emotion dysregulation and (iii) intrusive memories upon VR analogue trauma exposure. In particular, our sample of high trait anxiety individuals displayed limited access to different emotion regulation strategies as well as increased worry and rumination regarding perceived intrusive memories. Considering the complex interplay of multiple risk factors, our findings suggests that peri-traumatic affective processing seems to mediate high trait anxiety and post-traumatic intrusive memories thereby pointing out the central role of peri-traumatic processes for intrusion development. In addition, HA as a modulating pre-traumatic risk factor might further increase the risk of later dysfunctional processing of an analogue trauma by interacting with factors of affective processing during analogue trauma exposure. Implications of these findings which may contribute to a higher risk to develop PTSD are discussed.

A randomised controlled trial investigating the benefits of adaptive working memory training for working memory capacity and attentional control in high worriers

The process of worry has been associated with reductions in working memory capacity and availability of resources necessary for efficient attentional control. This, in turn, can lead to escalating worry. Recent investigations into working memory training have shown improvements in attentional control and cognitive performance in high trait-anxious individuals and individuals with sub-clinical depression. The current randomised controlled trial investigated the effects of 15 days of adaptive n-back working memory training, or an active control task, on working memory capacity, attentional control and worry in a sample of high worriers. Pre-training, post-training and one-month follow-up measures of working memory capacity were assessed using a Change Detection task, while a Flanker task was used to assess attentional control. A breathing focus task was used as a behavioural measure of worry in addition to a number of self-report assessments of worry and anxiety. Overall there was no difference between the active training and the active control condition with both groups demonstrating similar improvements in working memory capacity and worry, post-training and at follow-up. However, training-related improvements on the n-back task were associated with gains in working memory capacity and reductions in worry symptoms in the active training condition. These results highlight the need for further research investigating the role of individual differences in working memory training.

Learning mechanisms underlying threat absence and threat relief: Influences of trait anxiety

Impaired safety learning has been proposed asa risk factor for anxiety disorders, but safety can be indicated by either threat absence or threat termination (i.e., relief). Here, we investigated the role of trait anxiety for both kinds of safety learning. Ninety-one participants underwent an acquisition phase during which one shape (threatCS) predicted a painful electric shock (unconditioned stimulus, US), one shape (reliefCS) followed the US, and one shape (absenceCS) became never associated with the US. In a following extinction phase, the three cues were presented again plus a control shape (controlCS). We found successful threat conditioning as threatCS was rated as more aversive (negative, arousing, anxiogenic and associated with US) than the other cues, and it elicited startle potentiation as well asa larger skin conductance response (SCR). Safety cues were rated equally positive and (non-)anxiogenic, but still lower than controlCS, whereas physiologically reliefCS elicited stronger appetitive responses (startle attenuation and low SCR) than absenceCS. Interestingly, an increase in trait anxiety was associated with a decrease in the differences between absenceCS and threatCS responses reflected in contingency ratings during extinction as well as stronger fear-startle responses to absenceCS. In sum, physiological responses but not ratings triggered by a relief signal compared to a threat-absence signal, indicated that the former is more appetitive than the latter. Strikingly, trait anxiety specifically mediated learning of threat absence, but not of threat termination, indicating that high trait anxious individuals experience relief normally, but have deficits in identifying signals of threat absence.

Attentional biases for threat after fear-related autobiographical recall

ABSTRACTBackground: Previous studies suggested that affective state could enhance stimulus salience and modulate attention allocation for mood-congruent information, but contrasting data have been reported on the effects of mood induction on attentional biases for threat (ABTs) in non-clinical individuals.Objective: We aimed to assess whether laboratory-induced negative mood can increase individuals’ tendency to allocate attention on threatening stimuli, thus determining a difficulty in attentional disengagement from threat. We also aimed at assessing whether level of trait anxiety could modulate the effect of mood induction on attentional biases.Methods: We used an autobiographical episode recall procedure for mood induction (fear, happiness and neutral episode recall), and an exogenous cueing task with threatening and non-threatening images to assess attentional biases in 120 undergraduate students.Results: Participants showed a significant difficulty in disengaging attention from threat after recalling fear-related episodes, independently from their trait anxiety level.Conclusions: These findings clarify that the ABTs are not exclusive to anxiety disorders or high trait anxiety individuals, and could also arise in non-clinical individuals in a fearful context.

Evidence for specificity of the impact of punishment on error-related brain activity in high versus low trait anxious individuals

A previous study suggests that when participants were punished with a loud noise after committing errors, the error-related negativity (ERN) was enhanced in high trait anxious individuals. The current study sought to extend these findings by examining the ERN in conditions when punishment was related and unrelated to error commission as a function of individual differences in trait anxiety symptoms; further, the current study utilized an electric shock as an aversive unconditioned stimulus. Results confirmed that the ERN was increased when errors were punished among high trait anxious individuals compared to low anxious individuals; this effect was not observed when punishment was unrelated to errors. Findings suggest that the threat-value of errors may underlie the association between certain anxious traits and punishment-related increases in the ERN.

Working memory regulates trait anxiety-related threat processing biases.

High trait anxious individuals tend to show biased processing of threat. Correlational evidence suggests that executive control could be used to regulate such threat-processing. On this basis, we hypothesized that trait anxiety-related cognitive biases regarding threat should be exaggerated when executive control is experimentally impaired by loading working memory. In Study 1, 68 undergraduates read ambiguous vignettes under high and low working memory load; later, their interpretations of these vignettes were assessed via a recognition test. Trait anxiety predicted biased interpretation of social threat vignettes under high working memory load, but not under low working memory load. In Study 2, 53 undergraduates completed a dot probe task with fear-conditioned Japanese characters serving as threat stimuli. Trait anxiety predicted attentional bias to the threat stimuli but, again, this only occurred under high working memory load. Interestingly however, actual eye movements toward the threat stimuli were only associated with state anxiety, and this was not moderated by working memory load, suggesting that executive control regulates biased threat-processing downstream of initial input processes such as orienting. These results suggest that cognitive loads can exacerbate trait anxiety-related cognitive biases, and therefore represent a useful tool for assessing cognitive biases in future research. More importantly, since biased threat-processing has been implicated in the etiology and maintenance of anxiety, poor executive control may be a risk factor for anxiety disorders. (PsycINFO Database Record

Mechanisms of Change During Attention Training and Mindfulness in High Trait-Anxious Individuals: A Randomized Controlled Study

The first aim of this study was to compare attention manipulation techniques deriving from metacognitive therapy (the Attention Training Technique; ATT) and mindfulness-based approaches (Mindfulness-Based Progressive Muscle Relaxation, MB-PMR) to a thought wandering control (TWC) condition, in terms of their impact on anxiety and four mechanisms: distancing, present-focused attention, uncontrollability and dangerousness, metacognitive beliefs, and cognitive flexibility (Stroop task). The second aim was to test indirect effects of the techniques on anxiety via the mechanism measures. High trait anxious participants (N = 81, Mage = 23.60, SDage = 7.66, 80% female) were randomized to receive ATT, MB-PMR, or the TWC condition. Measures of cognitive and somatic anxiety, distancing, present-focused attention, metacognitive beliefs, and cognitive flexibility were administered before or after the attention manipulation task. Compared to the TWC group, ATT and MB-PMR were associated with greater changes on cognitive (but not somatic) anxiety, present-focused attention, metacognitive beliefs, and uncorrected errors for threat-related words on the Stroop task. The pattern of means was similar for distancing, but this did not reach statistical significance, and Stroop speed increased equally for all conditions. Indirect effects models revealed significant effects of condition on state anxiety via distancing, metacognitive beliefs, and present-focused attention, but not via Stroop errors. ATT and MB-PMR were associated with changes on anxiety and the mechanism measures, suggesting that the mechanisms of change may be more similar than different across these techniques.

Frontal EEG Asymmetry Differs between High and Low Trait Anxious Individuals as a Function of Lateralized Vibrotactile Stress

Anxiety is an aversive emotional state marked by hyperarousal and cognitive impairments. Studies using Quantitative Electroencephalography (QEEG) have shown asymmetric right frontal and parietotemporal activity at resting baseline in trait anxious subjects. However, there has been a lack of research investigating changes in QEEG asymmetries in trait anxious subjects following stress. The current study aimed to assess changes in QEEG asymmetries following lateralized vibrotactile and affective stress in trait anxious subjects. Following a two-minute baseline, subjects underwent two 2-minute stress periods, during which they were presented with auditory and counterbalanced unilateral vibrotactile stressors, each followed by a two-minute recording period. Subjects were classified as high or low trait anxious based on their scores on the Spielberger Trait Anxiety Inventory. A repeated measures ANOVA revealed significant asymmetry score differences between the high and low anxious groups in the F3/F4 (F(1,32) = 5.30, p < 0.03), and F7/F8 (F(1,32) = 4.20, p < 0.05) electrode pairs as a function of lateralized vibrotactile stress. No significant differences were found between groups in the Fp1/Fp2, C3/C4, P3/P4, and P7/P8 electrode pairs or between trials in any of the electrode pairs for either group. These results replicate previous findings demonstrating differences in EEG frontal asymmetries between subjects scoring high or low in trait anxiety with but do not support the use of changes in asymmetry scores as a marker of acute stress. More work needs to be done regarding EEG frontal asymmetry and acute stress.

Frontal EEG Asymmetry Differs between High and Low Trait Anxious Individuals as a Function of Lateralized Vibrotactile Stress

Anxiety is an aversive emotional state marked by hyperarousal and cognitive impairments. Studies using Quantitative Electroencephalography (QEEG) have shown asymmetric right frontal and parietotemporal activity at resting baseline in trait anxious subjects. However, there has been a lack of research investigating changes in QEEG asymmetries in trait anxious subjects following stress. The current study aimed to assess changes in QEEG asymmetries following lateralized vibrotactile and affective stress in trait anxious subjects. Following a two-minute baseline, subjects underwent two 2-minute stress periods, during which they were presented with auditory and counterbalanced unilateral vibrotactile stressors, each followed by a two-minute recording period. Subjects were classified as high or low trait anxious based on their scores on the Spielberger Trait Anxiety Inventory. A repeated measures ANOVA revealed significant asymmetry score differences between the high and low anxious groups in the F3/F4 (F(1,32) = 5.30, p < 0.03), and F7/F8 (F(1,32) = 4.20, p < 0.05) electrode pairs as a function of lateralized vibrotactile stress. No significant differences were found between groups in the Fp1/Fp2, C3/C4, P3/P4, and P7/P8 electrode pairs or between trials in any of the electrode pairs for either group. These results replicate previous findings demonstrating differences in EEG frontal asymmetries between subjects scoring high or low in trait anxiety with but do not support the use of changes in asymmetry scores as a marker of acute stress. More work needs to be done regarding EEG frontal asymmetry and acute stress.

高焦虑个体对情绪面孔的无意识注意偏向

本研究采用中国化面孔情绪图片作刺激材料，通过阈下情绪启动任务比较高低特质焦虑个体对不同情绪面孔效价判断的正确率的差异。探讨高、低特质焦虑个体对正负性信息的无意识注意偏向的差异。结果发现：1) 呈现正性图片时，高焦虑个体在非启动条件下的正确率显著高于启动条件和控制条件。低焦虑组没有显著差异；2) 呈现负性图片时，高低焦虑个体在启动和控制条件下的正确率显著高于非启动条件；3) 在启动条件下，高焦虑个体对负性图片判断的正确率远高于正性图片，低焦虑个体没有显著差异；4) 在控制条件下，高低焦虑个体对负性目标图片判断的正确率显著高于正性目标图片。结论：高焦虑个体对威胁面孔存在无意识注意偏向。人们对恐惧情绪的反应强于其它表情。 The study was designed to investigate the differences in the unconscious attention bias to positive and negative information in high trait anxiety and low trait anxiety individuals. Face pictures taken from Chinese Affective Picture System of Faces were used as stimuli. High trait anxiety (HTA) and low trait anxiety (LTA) individuals were tested with a subliminal emotional priming paradigm to examine the correct rates of judgments of different emotional faces. Results: 1) When presented the positive pictures, the hits rate in non-priming condition was significantly higher than in priming and control condition in HTA individuals, while there were no differences in LTA individuals; 2) When presented the negative pictures, the hits rate in priming and control condition was significantly higher than in non-priming condition in both HTA and LTA individuals; 3) Under subliminal priming condition, the hits rate of negative pictures was significantly higher than the positive pictures in HTA individuals, while there were no differences in LTA individuals; 4) Under subliminal control condition, the hits rate of negative pictures was significantly higher than the positive pictures in both HTA and LTA individuals. Conclusion: The unconscious processing of threat information of HTA individuals enhanced the conscious processing of threat information. Another conclusion of this study was that compared with other expressions, people were more sensitive to fear.

Modulatory Effect of Motivation on the Association of Trait Anxiety and Cognitive Performance: A Pupillometric Study

The attentional control theory (ACT) proposes that trait anxiety disrupts functional efficiency of executive control of attention relating to working memory system such as shifting. ACT also emphasizes the modulatory role of motivation in anxiety on cognitive task performance. The present study investigated the association of trait anxiety-related inefficiencies in attentional shift and working memory performance in conjunction with the level of motivation. A variation of complex span paradigm is designed to systematically manipulate the time constraint on shifting attentional focus back and forth between working memory contents and processing task was used in this study. In the experiment, participants high and low in trait anxiety were allocated either high or low motivation induction conditions, and performed a series of complex span tasks. They also completed a state anxiety measure before and after the experimental task. Motivational states were assessed by the pupil dilation, which is known to reflect the amount of cognitive effort invested on the task at hand. Results showed that, only in low motivation condition, high trait-anxious individuals exhibited greater difficulty, relative to those low in trait anxiety, in maintaining working memory contents as the task demand increased. State anxiety showed no relation to working memory performance regardless of the level of motivation and task demands. Pupillary responses revealed that, in high motivational state, high trait-anxious individuals invested more effort than those low in trait anxiety when the task demand was low, F(1, 132) = 6.65, p = 0.0110, to moderate, F(1, 132) = 8.441, p = 0.00043. In accordance with ACT, these findings suggest that motivation can modulate the association between trait anxiety and cognitive performance along with the levels of task demand. Clinical implication is briefly discussed.

The temporal dynamics of directed reappraisal in high-trait-anxious individuals.

High-trait-anxious (HTA) individuals often experience high levels of negative emotions, signaling potential abnormalities in the down-regulation of negative emotions. In this study, we used event-related potentials to examine whether HTA individuals can effectively use directed reappraisal to down-regulate negative emotions. Participants completed a passive picture-viewing task in which pictures were preceded by audio descriptions of their content. For unpleasant pictures, descriptions were either neutral or negative, whereas for neutral pictures, only neutral descriptions were given. Self-report behavioral results indicated that HTA individuals reported greater unpleasantness for the pictures than did low-trait-anxious (LTA) individuals but revealed no abnormality in decreasing negative emotional experience. Such abnormality, however, did emerge neurally. Analyses focused on the central-parietal late positive potential (LPP), a neural marker of emotion regulation. LTA individuals showed an LPP reduction in response to unpleasant pictures with negative descriptions compared to neutral ones at 400-3000-ms post-picture-onset, indicating effective down-regulation of negative emotions. HTA individuals, however, showed no LPP reduction at 400- to 1,000-ms post picture onset. Instead, they showed an LPP increase in response to unpleasant pictures with negative descriptions compared to neutral ones at 1,000- to 2,000-ms post picture-onset. These abnormal central-parietal LPP patterns not only verify that HTA individuals exhibit ineffective use of directed reappraisal to down-regulate neural responses to unpleasant stimuli, but also reveal an abnormal time-course of directed reappraisal in such individuals. Our findings also suggest that the ineffective use of cognitive reappraisals may contribute to the generally elevated levels of negative emotionality in HTA individuals. (PsycINFO Database Record

Enhanced Eyeblink Conditioning in Behaviorally Inhibited Individuals is Disrupted by Proactive Interference Following US Alone Pre-exposures.

Anxiety vulnerable individuals exhibit enhanced acquisition of conditioned eyeblinks as well as enhanced proactive interference from conditioned stimulus (CS) or unconditioned stimulus (US) alone pre-exposures (Holloway et al., 2012). US alone pre-exposures disrupt subsequent conditioned response (CR) acquisition to CS-US paired trials as compared to context pre-exposure controls. While Holloway et al. (2012) reported enhanced acquisition in high trait anxiety individuals in the context condition, anxiety vulnerability effects were not reported for the US alone pre-exposure group. It appears from the published data that there were no differences between high and low anxiety individuals in the US alone condition. In the work reported here, we sought to extend the findings of enhanced proactive interference with US alone pre-exposures to determine if the enhanced conditioning was disrupted by proactive interference procedures. We also were interested in the spontaneous eyeblinks during the pre-exposure phase of training. We categorized individuals as anxiety vulnerability or non-vulnerable individuals based scores on the Adult Measure of Behavioral Inhibition (AMBI). Sixty-six participants received 60 trials consisting of 30 US alone or context alone pre-exposures followed by 30 CS-US trials. US alone pre-exposures not only disrupted CR acquisition overall, but behaviorally inhibited (BI) individuals exhibited enhanced proactive interference as compared to non-inhibited (NI) individuals. In addition, US alone pre-exposures disrupted the enhanced acquisition observed in BI individuals as compared to NI individuals following context alone pre-exposures. Differences were also found in rates of spontaneous eyeblinks between BI and NI individuals during context pre-exposure. Our findings will be discussed in the light of the neural substrates of eyeblink conditioning as well as possible factors such as hypervigilance in the amygdala and hippocampal systems, and possible learned helplessness. Applications of these findings of enhanced proactive interference in BI individuals to pre-exposure therapies to reduce anxiety disorders such as posttraumatic stress disorder (PTSD) will be discussed.

To risk or not to risk: Anxiety and the calibration between risk perception and danger mitigation.

Anxiety prepares an organism for dealing with threats by recruiting cognitive resources to process information about the threat, and by engaging physiological systems to prepare a response. Heightened trait anxiety is associated with biases in both these processes: high trait-anxious individuals tend to report heightened risk perceptions, and inappropriate engagement in danger mitigation behavior. However, no research has addressed whether the calibration between risk perception and danger mitigation behavior is affected by anxiety, though it is well recognized that this calibration is crucial for adaptive functioning. The current study aimed to examine whether anxiety is characterized by better or worse calibration of danger mitigation behavior to variations in risk magnitude. Low and high trait-anxious participants were presented with information about the likelihood and severity of a danger (loud noise burst) on each trial. Participants could decide to mitigate this danger by investing a virtual coin, at the cost of losing danger mitigation ability on subsequent trials. Importantly, level of risk likelihood and severity were varied independently, and the multiplicative relationship between the 2 defined total danger. Multilevel modeling showed that the magnitude of total danger predicted the probability of coin investments, over and above the effects of risk likelihood and severity, suggesting that participants calibrated their danger mitigation behavior to integrated risk information. Crucially, this calibration was affected by trait anxiety, indicating better calibration in high trait-anxious individuals. These results are discussed in light of existing knowledge and models of the effect of anxiety on risk perception and decision-making. (PsycINFO Database Record

Training working memory to improve attentional control in anxiety: A proof-of-principle study using behavioral and electrophysiological measures

Trait anxiety is associated with impairments in attentional control and processing efficiency (see Berggren & Derakshan, 2013, for a review). Working memory training using the adaptive dual n-back task has shown to improve attentional control in subclinical depression with transfer effects at the behavioral and neural level on a working memory task (Owens, Koster, & Derakshan, 2013). Here, we examined the beneficial effects of working memory training on attentional control in pre-selected high trait anxious individuals who underwent a three week daily training intervention using the adaptive dual n-back task. Pre and post outcome measures of attentional control were assessed using a Flanker task that included a stress induction and an emotional a Antisaccade task (with angry and neutral faces as target). Resting state EEG (theta/beta ratio) was recorded to as a neural marker of trait attentional control. Our results showed that adaptive working memory training improved attentional control with transfer effects on the Flanker task and resting state EEG, but effects of training on the Antisaccade task were less conclusive. Finally, training related gains were associated with lower levels of trait anxiety at post (vs pre) intervention. Our results demonstrate that adaptive working memory training in anxiety can have beneficial effects on attentional control and cognitive performance that may protect against emotional vulnerability in individuals at risk of developing clinical anxiety.

Manipulating Attention to Nonemotional Distractors Influences State Anxiety: A Proof-of-Concept Study in Low- and High-Anxious College Students

Anxious individuals have difficulty inhibiting attention to salient, but nonemotional, distracting stimuli. The exact nature of this relationship remains unclear, however. In the present study, we tested the hypothesis that increasing attention to salient, but nonemotional, distracting stimuli would lead to increases in state anxiety by manipulating attentional strategies during a visual search task. We randomly assigned students low and high in trait anxiety to either a 1-session singleton detection training group or a feature search group. Singleton detection training increases distraction by salient, nonemotional stimuli whereas feature search training protects attention against distracting stimuli. Findings revealed that singleton detection training not only increased distraction by salient, nonemotional stimuli but also increased state anxiety. Moreover, this increase in state anxiety was most pronounced among high trait-anxious individuals. In contrast, feature search training protected attention against distracting stimuli and against increases in state anxiety, particularly in the high trait-anxious individuals. Together, the current findings provide initial support for the notion that distraction by salient, nonemotional stimuli can increase state anxiety levels. Furthermore, these results suggest that individuals already vulnerable to experience anxiety are most likely to be affected by distraction by salient, nonemotional stimuli, and that training anxious individuals to focus on specific shape features may be a viable attention modification intervention.

Trait anxiety and impaired control of reflective attention in working memory

The present study investigated whether the control of reflective attention in working memory (WM) is impaired in high trait anxiety individuals. We focused on the consequences of refreshing—a simple reflective process of thinking briefly about a just-activated representation in mind—on the subsequent processing of verbal stimuli. Participants performed a selective refreshing task, in which they initially refreshed or read one word from a three-word set, and then refreshed a non-selected item from the initial phrase or read aloud a new word. High trait anxiety individuals exhibited greater latencies when refreshing a word after experiencing the refreshing of a word from the same list of semantic associates. The same pattern was observed for reading a new word after prior refreshing. These findings suggest that high trait anxiety individuals have difficulty resolving interference from active distractors when directing reflective attention towards contents in WM or processing a visually presented word.

Impact of working memory load on cognitive control in trait anxiety: an ERP study.

Whether trait anxiety is associated with a general impairment of cognitive control is a matter of debate. This study investigated whether and how experimentally manipulated working memory (WM) load modulates the relation between trait anxiety and cognitive control. This question was investigated using a dual-task design in combination with event-related potentials. Participants were required to remember either one (low WM load) or six letters (high WM load) while performing a flanker task. Our results showed that a high WM load disrupted participants' ability to overcome distractor interference and this effect was exacerbated for the high trait-anxious (HTA) group. This exacerbation was reflected by larger interference effects (i.e., incongruent minus congruent) on reaction times (RTs) and N2 amplitudes for the HTA group than for the low trait-anxious group under high WM load. The two groups, however, did not differ in their ability to inhibit task-irrelevant distractors under low WM load, as indicated by both RTs and N2 amplitudes. These findings underscore the significance of WM-related cognitive demand in contributing to the presence (or absence) of a general cognitive control deficit in trait anxiety. Furthermore, our findings show that when limited WM resources are depleted by high WM load, HTA individuals exhibit less efficient recruitments of cognitive control required for the inhibition of distractors, therefore resulting in a greater degree of response conflict.