任务难度对基于位置返回抑制时间进程的影响

在返回抑制的实验范式下,采用线索一靶子模式进行了视觉字母觉察实验、实验发现,返回抑制在线索与靶子之间的时间间隔（ＳＯＡ）为７００ｍｓ时出现,且在９００ｍｓ时消退。这与先前许多实验发现的返回抑制在ＳＯＡ为３００ｍｓ左右时出现的结果不一致。作者认为,实验任务的难度是影响返回抑制时间进程的一个重要因素。     

对分心物特性抑制中位置因素的排除

本研究以汉语单字词为材料,使用反应时技术,考察在归类住条中分心物的位置因素是否也与分心物特性因素一样,影响被试对探测显示中目标的反应时间（RTDT）。结果表明,RTDT不随分心物位置数目变化而变化,只随着分心物特性数目变化而变化．由此得出,象归类这种属于语义表征的、与位置无关的任务中被试并不抑制分心物出现的位置,并可进一步推论,分心物抑制可能是一种灵活机制。     

Reactions to social and non‐social novelties in 2‐year‐olds

The purpose of this study is to investigate the internal structure of behavioural inhibition [cf. Goldsmith, H.H. and Campos, J.J. (1990). Child Development, 61 , 1944–1964]. Observations of 45 2‐year‐olds’ approaching/positive reactions, inhibited/negative reactions, and latencies, when encountering strangers as well as unfamiliar objects, are made in a laboratory setting. The intercorrelations between the six different measures, obtained from the observations, are analysed by means of a multitrait–multimethod matrix. It is concluded, from inspection of the matrix, that aggregations of data into indexes covering different reactions (approaching/positive reactions, inhibited/negative reactions, and latency) and settings (stranger and objects), respectively, are appropriate. To further validate the different indexes, assessments of concurrent variables (separation reactions, reactions to physical intrusion, reactions in a new setting, and maternal ratings of reactions to strangers) are used. The results indicate that all reactions to both social and non‐social novelties can be assigned to one construct, which is in line with the assumption made by Kagan and his co‐workers about behavioural inhibition. Copyright © 1999 John Wiley & Sons, Ltd.     

自恋双面性与行为系统的关系：性别的调节作用

为探索不同自恋得分的个体对奖赏与惩罚的敏感性及性别在其中的作用,本研究采用钦佩–竞争自恋问卷(NARQ)、BIS/BAS量表在483名在校大学生中进行调查。对数据进行共同方法偏差检验、相关分析以及基于多元回归的调节效应检验,结果发现：(1)钦佩性自恋与行为趋近系统存在显著正相关,与行为抑制系统存在显著负相关;(2)竞争性自恋与行为抑制系统存在显著正相关,而与行为趋近系统的相关不显著;(3)性别在自恋双面性与行为系统之间起调节作用。结果表明,女性自恋双面性得分越高,对奖赏和惩罚均越敏感;在男性被试中未表现出这种模式。     

Investigating behavior inhibition in obsessive-compulsive disorder: Evidence from eye movements

We investigated the role of inhibition failure in Obsessive Compulsive Disorder (OCD) through an eye tracking experiment. Twenty-five subjects with OCD were recruited, as well as 25 with Generalized Anxiety Disorder (GAD) and 25 healthy controls. A 3 (group: OCD group, GAD group and control group) × 2 (target eccentricity: far and near) × 2 (saccade task: prosaccade and antisaccade) mixed design was used, with all participants completing two sets of tasks involving both prosaccade (eye movement towards a target) and antisaccade (eye movement away from a target). The main outcome was the eye movement index, including the saccade latency (the time interval from the onset of the target screen to the first saccade) and the error rate of saccade direction. The antisaccade latency and antisaccade error rates for OCDs were much higher than those for GADs and healthy controls. OCDs had longer latency and error rates for antisaccades than for prosaccades, and for far-eccentricity rather than near-eccentricity stimuli. These results suggest that OCDs experience difficulty with behavior inhibition, and that they have higher visual sensitivity to peripheral stimuli. In particular, they show greatest difficulty in inhibiting behavior directed towards peripheral stimuli.     

Effects of serotonin receptor agonists and antagonists on offensive aggression in mice

The effects of serotonin receptor agonists 5-methoxytryptamine and quipazine, and antagonist mianserin on resident-intruder offensive aggression were investigated. Both agonists reduced aggression. The fact that 5-methoxytryptamine preferentially binds to 5-HT-1 receptors strongly suggest that the decreased aggression with S-methoxytryptamine was related to stimulation of an inhibitory 5-HT-1 receptor. It is also suggested that the reduction in aggression with quipazine was related to quipazine's preferential binding to the 5-HT-1 receptor. The 5-HT-2 receptor antagonist mianserin reduced aggression suggesting that 5-HT-2 receptor blockade is inhibitory for aggression. Thus, two serotonin classes of receptors may be differentially involved in offensive aggression.     

Meaning Selection and the Subcortex: Evidence of Reduced Lexical Ambiguity Repetition Effects Following Subcortical Lesions

Recent research indicates that individuals with nonthalamic subcortical (NS) lesions can experience difficulties processing lexical ambiguities in a variety of contexts. This study examined how prior processing of a lexical ambiguity influences subsequent meaning activation in 10 individuals with NS lesions and 10 matched healthy controls. Subjects made speeded lexical decisions on related or unrelated targets following homophone primes. Homophones were repeated with different targets biasing the same or different meanings on the second presentation. The effects of prime-target relatedness, interstimulus interval (200 or 1250 ms), and same vs. different meaning repetition were examined. Both the patient and control groups showed priming when the same homophone meaning was biased on repetition. When a different meaning was biased on the second presentation, no priming was evident in the controls, while facilitation remained present for the NS group, consistent with aberrant meaning selection and deactivation processes. These findings are discussed in terms of age and task-related repetition effects and current conceptions of frontal–subcortical involvement in cognition.David Copland is supported by the Australian Research Council     

Stuttering and sensory gating: a study of acoustic startle prepulse inhibition

It was hypothesized that stuttering may be related to impaired sensory gating, leading to overflow of superfluous disturbing auditory feedback and breakdown of the speech sequence. This hypothesis was tested using the acoustic startle prepulse inhibition (PPI) paradigm. A group of 22 adults with developmental stuttering were compared with controls regarding the degree of PPI. No significant differences were found between the stuttering adults and the control group; the groups showed similar means and distribution. Likewise, no relation between the degree of PPI and the effect of altered auditory feedback on stuttering was found. In summary, the results of the study indicate that there is no relation between stuttering and PPI.     

Latent Inhibition Depends on Inhibitory Attentional Learning to the Preexposed Stimulus: Evidence from Visual Search and Rule-Learning Tasks

Latent inhibition (LI) refers to findings of poorer learning with stimuli preexposed as irrelevant, compared to novel stimuli. In order to investigate the role of attention in traditional LI, two experiments with human subjects were conducted. Experiment 1 used a simplified visual-search design. As in previous studies, but now with a simpler design, there was a LI-like effect, thereby supporting the position that attentional learning to irrelevantly preexposed stimuli is reduced. Experiment 2 introduced conditions that were designed to exclude a potential contribution of novel popout to the visual-search LI-like effect. It was shown that the effect could be observed independently of contributions from novel popout. In addition, when participants were divided into good and poor attentional learners on the basis of visual-search LI scores, traditional rule-learning LI was established in good attentional learners, whereas it was absent in poor attentional learners. Together, these results indicate that visual-search procedures can be used to provide a measure for LI, and, as such, they support attention-based explanations of traditional LI.