Recognition of emotional pictures: Behavioural and electrophysiological measures

The effects of emotional content of images on recognition memory were studied, bringing together electrophysiological (Event-Related brain Potentials, ERPs) and behavioural (accuracy and speed of recognition, and remember/know judgements) indices. In the study phase, participants assessed 120 images on the scales of valence and arousal. In the test phase, ERPs were recorded while participants viewed again the images, put together with 120 new, and were asked to make old/new decisions and remember/know judgements on them. A clear arousal bias was obtained for remember/know judgements, which revealed that correctly recognised arousing images (negative and positive) received more remember judgements than nonarousing images (neutral and relaxing). Moreover, a Late Positive Component (LPC) activation revealed an old/new effect enhanced by arousing images. The LPC activation was located in parietal areas (precuneus), which appears to be mostly related to successful retrieval based on recollection. The results obtained through different indices supported the emotional bias found in previous studies for arousing material, but do not clarify the effect of the emotional valence on recognition.     

Line Spacing in Mondrian Paintings and Computer-Generated Modifications

Students compared computer-generated pictures of which I had line spacing and orientation proportional to that in a Mondrian picture (Mondrian-like), and 9 had divergent line spacing (divergently spaced). Preference was above average for the Mondrian-like picture compared with that for the divergently spaced pictures. However, participants did not prefer the Mondrian-like picture to divergently spaced pictures that were preselected as aesthetically pleasing by other participants. The results of the present experiments suggest that a computer algorithm can be developed to modify a picture in a way that is comparable with the way in which humans modify a picture to obtain a preferred picture. If aesthetic appeal is used in the storage and retrieval of visual information, then the algorithm could provide a better understanding of human perceptual processes. The results are related to consistency of aesthetic judgments across participants, levels of processing, and apparent contrast effects.     

Identification of fragmented object outlines: A dynamic interplay between different component processes

The speed of fragmented picture identification depends on a large number of factors whose effects might change in time during an identification attempt. Using survival analysis and fixed fragmentation levels, previous research has shown that effects of complexity, fragment curvature, and time interact. Here, we study the effects of presentation duration and dynamic fragmentation levels. Fragmented object outlines were presented repetitively every 2.25 s, and at each presentation longer fragments were shown (possibly until closure). We recorded the lowest presentation number (minimum 1, maximum 10) that resulted in correct naming by the participants (N=84). Survival analysis was employed to investigate whether and when different factors like presentation duration, complexity, object category (natural vs. artifactual), symmetry, proximity, and fragment curvature influence correct identification. The results confirm and extend previous findings, and are interpreted within a dynamic, interactive processing framework.     

汉词和图画再认的ERP效应及脑机制

目的：比较汉词与图画材料再认过程中的事件相关电位（ERP）表现并探讨其脑机制。方法：使用经典“学习一再认”实验模式对21名大学生进行测验,同时记录EEG,离线处理后对汉词及图画再认诱发的ERP波形主要成分及新旧效应进行比较。结果：两种材料的再认均诱发出了明显的新旧效应。顶区新旧效应头皮分布基本一致,但图画再认该效应波幅大于汉词再认;两种材料诱发的额区新旧效应有所不同,图画再认该效应为正走向,而汉词再认此效应表现为负走向趋势。结论：汉词与图画再认既存在某种共同的神经加工机制,叉分别涉及一些特异性的神经活动模式。     

Prohibited Pictures: Political Education and Platonic Elitism

This paper attempts to bring out the contemporary significance for the philosophy of education of Plato's strictures in the Republic against mimetic art forms. The argument follows a route which leads through an examination of Wittgenstein's picture theory of the proposition to the conclusion that this theory is itself a kind of picture which exercises over the intellect the selfsame erotic magnetism which Plato feared would corrupt the rulers of his ideal state.     

儿童即时加工道德情境图片的眼动特征

eye movement; moral-situational pictures; moral emotion; immediate processing     

Age-related changes of phasic heart rate responses to affective pictures

This study examined age differences in phasic heart rate in response to neutral, negative and positive pictures. Heart rate changes and subjective ratings were analyzed in 22 middle-aged (40-55 years) and 30 older (56-78 years) participants. The effects of valence on the HR pattern across time were similar to that obtained by Bradley and co-workers. Conversely to previous studies, we did not report any age-related reduction in cardiac reactivity. Instead, when viewing positive pictures, the triphasic wave form appeared in the group of older adults, but for younger participants, it was replaced by a sustained deceleration. These results were interpreted in the light of the socioemotional selectivity theory.     

Selective attention and avoidance on a pictorial cueing task during stress in clinically anxious and depressed participants

Although it is well established that attentional biases exist in anxious populations, the specific components of visual orienting towards and away from emotional stimuli are not well delineated. The present study was designed to examine these processes. We used a modified spatial cueing task to assess the speed of engagement and disengagement from supraliminal and masked pictorial cues depicting threat, dysphoria, or neutral content in 36 clinically anxious, 41 depressed and 41 control participants. Participants were randomly assigned to a stress or neutral condition. During stress, anxious participants were slow to disengage from masked left hemifield pictures depicting threat or dysphoria, but were quick to disengage from supraliminal threat pictures. Information processing in anxious participants during stress was characterized by early selective attention of emotional stimuli, occurring prior to full conscious awareness, followed by effortful avoidance of threat. Depressed participants were distinct from the anxious group, displaying selective attention for stimuli depicting dysphoria, but not threat, during the neutral condition. In sum, attentional biases in clinical populations are associated with difficulties in the disengagement component of visual orienting. Further, a vigilant-avoidant pattern of attentional bias may represent a strategic attempt to compensate for the early activation of a fear response.     

Mental models and other misconceptions in children’s understanding of the earth

This study investigated the claim (e.g., Vosniadou & Brewer’s, 1992) that children have naive “mental models” of the earth and believe, for example, that the earth is flat or hollow. It tested the proposal that children appear to have these misconceptions because they find the researchers’ tasks and questions to be confusing and ambiguous. Participants were 6- and 7-year-olds (N = 127) who were given either the mental model theorists’ original drawing task or a new version in which the same instructions and questions were rephrased to minimize ambiguity and, thus, possible misinterpretation. In response to the new version, children gave substantially more indication of having scientific understanding and less of having naive mental models, suggesting that the misconceptions reported by the mental model theorists are largely methodological artifacts. There were also differences between the responses to the original version and those reported by Vosniadou and Brewer, indicating that other factors, such as cohort and cultural effects, are also likely to help explain the discrepant findings of previous research.     

An Examination of the Relationship Between the Five Stages of the Yogacara Path to Enlightenment (唯識五位) and the Ten Ox-Herding Pictures (十牛圖)

This study proposed to compare and analyze the five stages of cultivating the Yogâcāra path (唯識五位) and the spiritual journey in the Ten Ox-Herding Pictures (十牛圖). To achieve this, the study investigated the core concepts and practice methods of the two approaches and analyzed their relations from the literatures reviewed. The results showed that the end goal of the two approaches is the same, the attainment of Buddhahood, with the two having common characteristics including the practice of being aware of the impermanent and no-self (無常·無我), and the fulfilling benefit of sentient beings. The results suggest that our Buddhist practice system needs to sincerely consider the realistic ways by which one can help people in agony in contemporary society, not by emphasizing on the enlightenment through a specific practice way for all people, but by tailored practice methods based on each one’s faculties in understanding Buddhism.