Hemispheric asymmetries in auditory distraction

Serial-verbal short-term memory is impaired by irrelevant sound, particularly when the sound changes acoustically (the changing-state effect). In contrast, short-term recall of semantic information is impaired only by the semanticity of irrelevant speech, particularly when it is semantically related to the target memory items (the between-sequence semantic similarity effect). Previous research indicates that the changing-state effect is larger when the sound is presented to the left ear in comparison to the right ear, the left ear disadvantage. In this paper, we report a novel finding whereby the between-sequence semantic similarity effect is larger when the irrelevant speech is presented to the right ear in comparison to the left ear, but this right ear disadvantage is found only when meaning is the basis of recall (Experiments 1 and 3), not when order is the basis of recall (Experiment 2). Our results complement previous research on hemispheric asymmetry effects in cross-modal auditory distraction by demonstrating a role for the left hemisphere in semantic auditory distraction.     

Hemispheric specialization and creative thinking: A meta-analytic review of lateralization of creativity

In the last two decades research on the neurophysiological processes of creativity has found contradicting results. Whereas most research suggests right hemisphere dominance in creative thinking, left-hemisphere dominance has also been reported. The present research is a meta-analytic review of the literature to establish how creative thinking relates to relative hemispheric dominance. The analysis was performed on the basis of a non-parametric vote-counting approach and effect-size calculations of Cramer’s phi suggest relative dominance of the right hemisphere during creative thinking. Moderator analyses revealed no difference in predominant right-hemispheric activation for verbal vs. figural tasks, holistic vs. analytical tasks, and context-dependent vs. context-independent tasks. Suggestions for further investigations with the meta-analytic and neuroscience methodologies to answer the questions of left hemispheric activation and further moderation of the effects are discussed.     

Right‐wing authoritarianism and social dominance orientation and the dimensions of generalized prejudice: A longitudinal test

A Dual Process Model (DPM) approach to prejudice proposes that there should be at least two dimensions of generalized prejudice relating to outgroup stratification and social perception, which should be differentially predicted by Right‐Wing Authoritarianism (RWA) and Social Dominance Orientation (SDO). The current study assessed the causal effects of SDO and RWA on three dimensions of prejudice using a full cross‐lagged longitudinal sample (N = 127). As expected, RWA, but not SDO, predicted prejudice towards ‘dangerous’ groups, SDO, but not RWA, predicted prejudice towards ‘derogated’ groups, and both RWA and SDO predicted prejudice towards ‘dissident’ groups. Results support previously untested causal predictions derived from the DPM and indicate that different forms of prejudice result from different SDO‐ and RWA‐based motivational processes. Copyright © 2009 John Wiley & Sons, Ltd.     

比喻性语言加工的脑机制

早期观点认为比喻性语言加工主要依赖右脑, 随着研究的深入, 右脑假说受到许多研究结果的挑战, 左脑参与比喻性语言的加工。同时, 左右脑语言区发挥各自不同的作用, 新的研究证实, 前额前部皮层同样参与比喻性语言的加工。比喻性语言的理解需要左右半球及前额皮层的共同激活, 同时对其加工还依赖左右半球的联合作用, 比喻性语言理解神经网络的建立需要新证据。     

Me, myself, and lie: The role of self-awareness in deception

Deception has been studied extensively but still little is known about individual differences in deception ability. We investigated the relationship between self-awareness and deception ability. We enlisted novice actors to portray varying levels of deception. Forty-two undergraduates viewed the videotaped portrayals and rated the actors’ believability. Actors with high private self-awareness were more effective deceivers, suggesting that high self-monitors are more effective at deceiving. Self-awareness may lead to knowledge of another’s mental state (i.e., Theory of Mind), which may improve an individual’s deception ability.     

Divided Visual Attention and Left Hemisphere Activation Among Psychopathic and Nonpsychopathic Offenders

Recent divided attention studies suggest the impulsive antisocial behavior of psychopaths may be related to deficient processing of information under conditions that place substantial demands on left-hemisphere-specific processing resources (left hemisphere activation (LHA) hypothesis; D. S. Kosson [1996, 1998]). To examine performance under conditions constraining eye movements and covert shifts of attention, 26 psychopathic and 46 nonpsychopathic inmates completed a divided attention task in which lateralized stimuli appeared briefly and simultaneously in the left visual field (LVF) and right visual field (RVF) of a monitor. Targets were either presented primarily in the RVF to induce LHA or were equiprobable in LVF and RVF to promote equal activation (EA) of left and right hemisphere resources. Psychopaths were less accurate than nonpsychopaths only under LHA conditions; within-group comparisons also revealed a substantial decrement from EA to LHA only in psychopaths. Thus, psychopaths’ performance deficits were specific to conditions priming left hemisphere resources asymmetrically.     

Is There a Right to Have Rights? The Case of the Right of Asylum

In dialogue with the political philosophy of Hannah Arendt and Seyla Benhabib the author draws on the idea of a right to have rights and raises the question under which political conditions asylum can be a subjective right for political refugees. He argues that mere spontaneous acts of humanitarianism will not suffice to define the institutional commitments of liberal democracies in refugee policy. At the same time, no duty for any particular state to take up refugees can be derived from a right to have rights. The quest for institutional solutions for a timely migration and asylum policy will rather enhance the discourses on the self-understanding of liberal democracies. With a critical eye on German asylum legislation and legal practice, the author contends that it will be a task of any co-ordinated European right of asylum to define political persecution in relation to the first dimension of human rights in order to differentiate the right of asylum from immigration legislation.     

Interhemispheric interaction in word‐ and color‐matching of Kanji color words1

Abstract: The aim of the present study was to investigate the possibility that a shift toward a within‐hemisphere advantage would emerge when two stimulus items receive, respectively, different processing (vs. when they receive similar processing). Using right‐handed participants, we briefly presented two Kanji color‐word items as either within‐field or across‐fields. Viewers had to match the two items in terms of ink color (a color‐matching task) or word meaning (a name‐matching task). Each Kanji color word was presented with the same (congruent) or different (incongruent) ink color relative to the word meaning. Our results were twofold. First, a within‐field advantage appeared in the relatively easier color‐matching task, whereas an across‐field advantage tended to occur in the relatively harder name‐matching task. Second, in the word‐matching task an across‐field advantage appeared when both Kanji color words appeared in similar processing manners (both congruent or both incongruent), whereas a within‐field advantage occurred when processing of two Kanji items differed (one congruent and one incongruent). These results suggested that a shift toward a within‐hemisphere advantage occurs when two items are processed in respectively different ways.     

Why might language and motor impairments occur together?

A step‐wise methodology is employed in order to identify common neurological factors underlying motor and language impairments where they occur together. A sample of 15 5–10‐year‐old children with predetermined language impairment was tested comprehensively using the Illinois Test of Psycholinguistic Ability (ITPA) and the Movement Assessment Battery for Children (Movement ABC). On the basis of these tests, only four of the sample were found to have generally poor performance both in psycholinguistic (particularly indexed by problems with visual closure and sound blending) and motor abilities (particularly indexed by manual dexterity problems—bimanual co‐ordination and drawing—and static balance. Further detailed examination of the findings fostered a number of plausible hypotheses to account for this communality. The viability of these different alternatives is discussed. Copyright © 2003 John Wiley & Sons, Ltd.     

Resource-dependent effects during sex categorization

The limited capacity of face perception resources in the left cerebral hemisphere was examined using a sex categorization task. One study tested the hypothesis that sex categorization is impeded whenever feature extraction resources in the left hemisphere are simultaneously being utilized by another task. This hypothesis was tested by presenting prime faces for either 32 ms or 320 ms to either the left or right visual-field just before centrally presented target faces were categorized by sex. Results showed that sex categorization was slower after prime faces were presented for 32 ms in the right visual-field compared to the left visual-field. This difference was not found after the 320 ms prime length. The results are interpreted in the context of a neurocognitive model of social perception and suggest that efficient sex categorization depends, in part, on the availability of facial feature extraction resources in the left hemisphere.