英国心理学会2007年学术年会介绍

作者应邀出席了英国心理学2007年学术年会。英国心理学会成立于1901年,有较长的历史;现有会员4万4千多人,在英国心理学研究和应用方面发挥了重要的领导和协调作用。2007年的学术年会有400余人参加,大会的主题发言、特邀报告、分组发言以及论文大字报展示了英国心理学家一年来在心理学各个领域的丰富研究成果     

事件性前瞻记忆的加工机制：来自ERP的证据

采用事件相关电位技术,对前瞻记忆的加工机制——主要是执行前的加工机制进行研究。控制条件为单纯的背景任务,实验条件为背景任务含前瞻记忆任务,对两种条件下非靶线索的行为数据进行比较,结果表明实验条件下被试的反应时显著长于控制条件,可能说明两种条件的认知过程存在差异,这种差异在ERPs上主要体现为刺激呈现200ms以后,两种条件的波形和脑地形图存在显著差异。结果支持预备注意加工和记忆加工理论,也部分支持多重加工理论     

Differential activation patterns of occipital and prefrontal cortices during motion processing: Evidence from normal and schizophrenic brains

Visual motion perception is normally mediated by neural processing in the posterior cortex. Focal damage to the middle temporal area (MT), a posterior extrastriate region, induces motion perception impairment. It is unclear, however, how more broadly distributed cortical dysfunction affects this visual behavior and its neural substrates. Schizophrenia manifests itself in a variety of behavioral and perceptual abnormalities that have proved difficult to understand through a dysfunction of any single brain system. One of these perceptual abnormalities involves impaired motion perception. Motion processing provides an opportunity to clarify the roles of multiple cortical networks in both healthy and schizophrenic brains. Using fMRI, we measured cortical activation while participants performed two visual motion tasks (direction discrimination and speed discrimination) and one nonmotion task (contrast discrimination). Normal controls showed robust cortical activation (BOLD signal changes) in MT during the direction and speed discrimination tasks, documenting primary processing of sensory input in this posterior region. In patients with schizophrenia, cortical activation was significantly reduced in MT and significantly increased in the inferior convexity of the prefrontal cortex, an area that is normally involved in higher level cognitive processing. This shift in cortical responses from posterior to prefrontal regions suggests that motion perception in schizophrenia is associated with both deficient sensory processing and compensatory cognitive processing. Furthermore, this result provides evidence that in the context of broadly distributed cortical dysfunction, the usual functional specificity of the cortex becomes modified, even across the domains of sensory and cognitive processing.     

内生意图性抑制:自我控制研究的新视角

行为抑制的"停止信号"多来自内生意图行为"是否做"决策过程最后时刻内生性否定指示(即内生意图性抑制),而非环境提前设定。因无法用行为指标(错误率、反应时)评估,需将"自由选择"范式结合f MRI、EEG等技术测量与之相关的脑神经、自主神经生理特点;此外,范式中加入的刺激阈下启动、情绪信息影响了内生意图性抑制的加工过程。未来从三个方面拓展研究:(1)明确背内侧额叶皮质的心理机制;(2)探索人格特质的影响;(3)"停止信号"内生日常化。     

Females excel at basic face perception

Females are generally better than males at recognizing facial emotions. However, it is not entirely clear whether and in what way females may also excel at non-affective face recognition. Here, we tested males and females on two perceptual face recognition tasks that involved only neutral expressions: detection and identity discrimination. On face detection (Experiment 1), females were significantly more accurate than males in detecting upright faces. This gender difference was reduced during inverted face detection, and not present during tree detection, suggesting that the magnitude of the gender difference for performance co-varies with the extent to which face processing mechanisms are involved. On facial identity discrimination (Experiment 2), females again outperformed males, particularly when face images were masked by visual noise, or the delay between comparison face images was extended from 0.5 to 3 s. These results reveal a female advantage in processing face-specific information and underscore the role of perceptual factors in socially relevant gender differences.     

An intensional epistemic logic

One of the fundamental properties inclassical equational reasoning isLeibniz's principle of substitution. Unfortunately, this propertydoes not hold instandard epistemic logic. Furthermore,Herbrand's lifting theorem which isessential to thecompleteness ofresolution andParamodulation in theclassical first order logic (FOL), turns out to be invalid in standard epistemic logic. In particular, unlike classical logic, there is no skolemization normal form for standard epistemic logic. To solve these problems, we introduce anintensional epistemic logic, based on avariation of Kripke's possible-worlds semantics that need not have a constant domain. We show how a weaker notion of substitution through indexed terms can retain the Herbrand theorem. We prove how the logic can yield a satisfibility preserving skolemization form. In particular, we present an intensional principle for unifing indexed terms. Finally, we describe asound andcomplete inference system for a Horn subset of the logic withequality, based onepistemic SLD-resolution.     

意象对话技术治疗老年抑郁症的疗效观察

采用临床对照方法探讨意象对话技术对老年抑郁症的疗效,170例老年抑郁症患者随机分为2组,在应用5-羟色胺再摄取抑制剂（SSRIs）类抗抑郁药物治疗的基础上采用不同心理治疗方法：意象组采用意象对话技术;CBT 组采用支持性心理治疗和认知行为技术。所有患者随访一年,用汉密尔顿抑郁量表（HAMD）进行评定。结果表明意象对话技术对老年抑郁症的疗效与CB T疗效相当,且见效快,复发率低。利用其躯体出现的症状、感觉进行意象引导处理,可快速消除或减轻其身心痛苦,证实了意象对话技术可以在老年抑郁症中应用。     

Task-irrelevant emotional faces impair response adjustments in a double-step saccade task

Cognitive control enables us to adjust behaviours according to task demands, and emotion influences the cognitive control. We examined how task-irrelevant emotional stimuli impact the ability to inhibit a prepared response and then programme another appropriate response. In the study, either a single target or two sequential targets appeared after emotional face images (positive, neutral, and negative). Subjects were required to freely viewed the emotional faces and make a saccade quickly upon target onset, but inhibit their initial saccades and redirect gaze to the second target if it appeared. We found that subjects were less successful at inhibiting their initial saccades as the inter-target delay increased. Emotional faces further reduced their inhibition ability with a longer delay, but not with a shorter delay. When subjects failed to inhibit the initial saccade, the longer delay produced longer intersaccadic interval. Especially, positive faces lengthened the intersaccadic interval with a longer delay. These results showed mere presence of emotional stimuli influences gaze redirection by impairing the ability to cancel a prepared saccade and delaying the programming of a corrective saccade. Therefore, we propose that the modulation of response adjustment exerted by emotional faces is related to the stage of initial response programming.     

自我觉知的适应、不适应性及其在心理疗法中的作用

自我觉知是当注意力指向个体自身时对自己所产生的内部主观状态,根据其指向及程度可以有多种分类方法。自我觉知在心理过程中既有适应性,如促进自我了解、对他人的理解、提高自尊等;但过度的自我觉知会对心理产生不良影响,诸多研究对其与抑郁和焦虑的关系进行了论证。很多心理疗法中都涉及到自我觉知对心理状况的影响,包括格式塔疗法、来访者中心疗法、森田疗法等等。如何保持适度的自我觉知以促进心理健康是需要进一步研究的。     

中国传统文化取向管理人员的成败归因风格研究

选用台湾杨国枢先生编制的《传统性量表》和自编《管理成败归因风格问卷》,随机选取542名企业管理人员,调查研究中国传统文化取向管理人员的成败归因风格特征。研究发现：1）“孝亲敬祖”和“宿命自保”文化取向的人,成功外归因的倾向显著地高于成功内归因倾向。2）“男性优越”、“权威守成”、“宿命自保”文化取向的人,失败不可控外归因倾向显著地高于失败内归因倾向。