情绪性注意瞬脱的认知机制:来自行为与ERP的证据

从过度投入理论与激活反弹理论对瓶颈理论的质疑出发,采用ERP技术检验了情绪性注意瞬脱的加工过程及其神经机制。行为结果显示,以恐惧面孔为T1,中性场景图片为T2,则恐惧面孔T1相对中性面孔T1显著降低了中性T2的识别正确率,进而诱发了情绪性注意瞬脱。ERP结果进一步显示,相较于中性面孔T1,恐惧面孔T1诱发的情绪加工影响了代表中枢加工资源的两阶段P3波幅,使得其始终高于代表标准注意瞬脱的中性面孔T1条件和代表非注意瞬脱的单任务基线条件。以上结果证明,情绪性注意瞬脱形成自情绪性T1加工所诱发的中枢资源过度投入,而非源自中枢资源瓶颈。     

Limits of control: The effects of uncontrollability experiences on the efficiency of attentional control

Two experiments were conducted to explore the effects of experiencing uncontrollability on the efficiency of attentional control. The experience of uncontrollability was induced either by unsolvable tasks (Experiment 1) or by tasks in which non-contingent feedback was provided (Experiment 2). A version of the Attentional Network Test-Interactions with an additional measure of vigilance (ANTI-V) was used to evaluate the efficiency of the attentional networks (i.e., alerting, orienting, and executive). Results of both experiments revealed a decreased efficiency of executive attention in participants who experienced stable control deprivation but no negative effects in participants who were able to restore their sense of previously deprived control. Additionally, when participants were asked to perform unsolvable tasks and did not receive feedback (Experiment 1), detrimental effects on the orienting network and vigilance were observed. The motivational and cognitive mechanisms underlying the effects of various uncontrollability experiences on conflict resolution and attentional control are discussed.     

Valuable orientations capture attention

Visual attention has long been known to be drawn to stimuli that are physically salient or congruent with task-specific goals. Several recent studies have shown that attention is also captured by stimuli that are neither salient nor task relevant, but that are rendered in a colour that has previously been associated with reward. We investigated whether another feature dimension—orientation—can be associated with reward via learning and thereby elicit value-driven attentional capture. In a training phase, participants received a monetary reward for identifying the colour of Gabor patches exhibiting one of two target orientations. A subsequent test phase in which no reward was delivered required participants to search for Gabor patches exhibiting one of two spatial frequencies (orientation was now irrelevant to the task). Previously rewarded orientations robustly captured attention. We conclude that reward learning can imbue features other than colour—in this case, specific orientations—with persistent value.     

Distorted subjective reports of stimulus onsets under dual-task conditions: Delayed conscious perception or estimation bias?

We investigated whether selecting a response for one task delays the conscious perception of another stimulus (delayed conscious perception hypothesis). In two experiments, participants watched a revolving clock hand while performing two tasks in close succession (i.e. a dual-task). Two stimuli were presented with varying stimulus onset asynchrony (SOA). After each trial, participants separately estimated the onsets of the two stimuli on the clock face. Across two experiments and four conditions, we manipulated response requirements and assessed their impact on perceived stimulus onsets. Results showed that (a) providing speeded responses to the stimuli did lead to greater SOA-dependent misperceptions of both stimulus onsets as compared to a solely perceptual condition, and (b) that response grouping reduced these misperceptions. Overall, the results provide equivocal evidence for the delayed conscious perception hypothesis. They rather suggest that participants’ estimates of the two stimulus onsets are biased by the interval between their responses.     

Effects of chronic exercise on attentional bias among individuals with methamphetamine use disorder

BackgroundIndividuals with substance use disorder show attentional bias toward drug-related cues, which may be associated with attentional control deficits. Although exercise improves attention in healthy people, whether individuals with substance use disorder also benefit is unknown. We explored the effects of chronic exercise on behavioral and neural correlates of attentional bias in men with methamphetamine use disorder.MethodsSixty-one such men were randomized to high- or moderate-intensity exercise or to a control group with little exercise for 12 weeks. The dot-probe task assessed attentional bias before and after exercise intervention, with event-related potentials recorded during the task to determine underlying neural mechanisms.ResultsAttentional bias scores and event-related potential amplitudes significantly decreased after high- or moderate-intensity chronic exercise, but not in controls.ConclusionsChronic exercise reduces attentional bias in individuals with methamphetamine use disorder by enhancing early identification of drug-related stimuli and diverting attention to reduce conflict processing.     

Postnatal mental health and mothers’ processing of infant emotion: an eye-tracking study

ABSTRACT

Background

Postnatal mental illnesses are associated with less maternal sensitivity. Differences in how mothers with and without mental illness process infant emotions could explain this. People with mental illness in non-perinatal populations show certain processing patterns when viewing emotional faces, but it is not clear whether these patterns are present in mothers.     

Upshifted decision criteria in attentional blink and repetition blindness

A large number of “unawareness” phenomena have been explained and quantified in terms of sensitivity (d′) fluctuations, with very few attempts at addressing an alternative putative cause, i.e., fluctuations of subjects’ response criteria (c). Response criteria fluctuations are particularly likely under dual-task paradigms with unbalanced sensitivities (Gorea & Sagi, 2000) such as those used in evidencing attentional blink (AB) and repetition blindness (RB) phenomena. The present study inquires into whether AB and RB are indeed prone to a deviant decisional behaviour. AB and RB were studied with a yes/no task allowing the assessment of d′ and c for the detection (presence/absence) of a target letter T2 as a function of its temporal lag relative to the presentation of another (AB) or of the same (RB) letter, T1 (Experiment 1). A significant criterion increase was observed in both cases. Additional experiments demonstrate that this criterion effect is typical of these dual-task AB and RB paradigms as it is not observed in a standard contrast detection task with mixed contrasts (Experiment 2), in a “control” AB design stripped off its first task T1 (Experiment 3), or in a metacontrast experiment (Experiment 4). We propose that the observed criterion shifts are the consequence of the inherent dual-task AB and RB designs (where observers have to judge two events of unequal saliencies) and that they entail an enhancement of the AB and RB effects as long as these effects are assessed via subjective (yes/no or matching) procedures.     

Attentional Bias,Self-consciousness and Perfectionism in Social Phobia Before and After Cognitive-Behaviour Therapy

Attentional bias for threat words (as measured by the emotional Stroop task), selfconsciousness and perfectionism was studied in 24 patients with social phobia before and after cognitive-behaviour treatment. A total of 18 (75%) of the patients were classified as treatment responders on the basis of reduced scores for social anxiety. The treatment responders showed a significant reduction in attentional bias for social threat words, in public self-consciousness and in perfectionism. The non-responders showed an equal reduction in perfectionism; as they had a much higher level of perfectionism before treatment, however, their change only amounted to a lowering of their level of perfectionism to the level that characterized the treatment responders before treatment. The treatment responders, on the other hand, reduced their level of perfectionism to that of non-clinical samples.     

儿童中期计划能力和注意能力的关系：一项交叉滞后研究

本研究追踪了139名儿童在7岁、8岁和9岁时在计划和注意任务上的表现,通过交叉滞后分析考察了此期间计划能力与注意能力不同成分（持续性注意,抑制控制和选择性注意）在发展上的关系。结果发现抑制控制和选择性注意与计划能力在7岁-8岁期间存在着正向的双向作用关系,而7岁时的持续性注意和抑制控制正向预测8岁时的计划能力,7岁时的计划能力正向预测8岁时的选择性注意。这些结果表明计划能力和注意能力的不同成分之间存在着发展上的双向作用关系。     

暴力犯罪者对负性情绪信息注意偏向的ERP研究

采用视觉搜索范式,探讨了暴力犯罪者对情绪刺激（愤怒面孔与高兴面孔）的注意偏向特点。行为数据显示,相比非暴力组,暴力组对愤怒面孔的反应要显著快于高兴面孔,初步验证了暴力犯罪者对负性情绪信息存在注意偏向。ERP数据进一步表明,当目标刺激为愤怒面孔时,暴力组N2pc的潜伏期要显著小于非暴力组,说明暴力犯罪者对愤怒面孔的觉察早于高兴面孔,对负性情绪刺激更为敏感。由于N2pc的波幅不存在显著差异,差异主要表现在反应时和潜伏期,说明暴力犯能够更快的觉察到负性情绪面孔,但并没有对其投入更多的注意资源,出现回避模式,表明暴力犯对负性情绪信息的加工是一种警觉—回避模式。