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61.
62.
Kartik K. Sreenivasan Caterina Gratton Jason Vytlacil Mark D’Esposito 《Cognitive, affective & behavioral neuroscience》2014,14(1):117-128
Isolating the short-term storage component of working memory (WM) from the myriad of associated executive processes has been an enduring challenge. Recent efforts have identified patterns of activity in visual regions that contain information about items being held in WM. However, it remains unclear (1) whether these representations withstand intervening sensory input and (2) how communication between multimodal association cortex and the unimodal perceptual regions supporting WM representations is involved in WM storage. We present evidence that the features of a face held in WM are stored within face-processing regions, that these representations persist across subsequent sensory input, and that information about the match between sensory input and a memory representation is relayed forward from perceptual to prefrontal regions. Participants were presented with a series of probe faces and indicated whether each probe matched a target face held in WM. We parametrically varied the feature similarity between the probe and target faces. Activity within face-processing regions scaled linearly with the degree of feature similarity between the probe face and the features of the target face, suggesting that the features of the target face were stored in these regions. Furthermore, directed connectivity measures revealed that the direction of information flow that was optimal for performance was from sensory regions that stored the features of the target face to dorsal prefrontal regions, supporting the notion that sensory input is compared to representations stored within perceptual regions and is subsequently relayed forward. Together, these findings indicate that WM storage operations are carried out within perceptual cortex. 相似文献
63.
We examined the categorical nature of emotion word recognition. Positive, negative, and neutral words were presented in lexical decision tasks. Word frequency was additionally manipulated. In Experiment 1, “positive” and “negative” categories of words were implicitly indicated by the blocked design employed. A significant emotion–frequency interaction was obtained, replicating past research. While positive words consistently elicited faster responses than neutral words, only low frequency negative words demonstrated a similar advantage. In Experiments 2a and 2b, explicit categories (“positive,” “negative,” and “household” items) were specified to participants. Positive words again elicited faster responses than did neutral words. Responses to negative words, however, were no different than those to neutral words, regardless of their frequency. The overall pattern of effects indicates that positive words are always facilitated, frequency plays a greater role in the recognition of negative words, and a “negative” category represents a somewhat disparate set of emotions. These results support the notion that emotion word processing may be moderated by distinct systems. 相似文献
64.
Emanuele Fino Sergio Melogno Paolo Iliceto Sara D’Aliesio Maria Antonietta Pinto Gabriella Candilera Ugo Sabatello 《Advances in cognitive psychology / University of Finance and Management in Warsaw》2014,10(2):32-38
Background. Adolescence represents a critical period for brain
development, addressed by neurodevelopmental models to frontal,
subcortical-limbic, and striatal activation, a pattern associated with rise of
impulsivity and deficits in inhibitory control. The present study aimed at
studying the association between self-report measures of impulsivity and
inhibitory control with executive function in adolescents, employing structural
equation modeling. Method. Tests were administered to 434 high
school students. Acting without thinking was measured through the Barratt
Impulsiveness Scale and the Dickman Impulsivity Inventory, reward sensitivity
through the Behavioral Activation System, and sensation seeking through the
Zuckerman–Kuhlman–Aluja Personali- ty Questionnaire. Inhibitory control was
assessed through the Behavioral Inhibition System. The performance at the
Wisconsin Card Sorting Task indicated executive function. Three models were
specified using Sample Covariance Matrix, and the estimated parameters using
Maximum Likelihood. Results. In the final model, impulsivity and
inhibitory control predicted executive function, but sensation seeking did not.
The fit of the model to data was excellent. Conclusions. The
hypothesis that inhibitory control and impulsivity are predictors of executive
function was supported. Our results appear informative of the validity of
self-report measures to examine the relation between impulsivity traits rather
than others to regulatory function of cognition and behavior. 相似文献
65.
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67.
Ken’ichi Yokoyama Yuki Hirata Toshiaki Inaba Kenichiro Mutoh Jun’ichi Sakai 《Philosophical Magazine Letters》2017,97(1):11-18
The role of the dynamic interactions between hydrogen in a solid solution and the stress-induced martensite transformation in hydrogen embrittlement has been investigated using trained Ni–Ti superelastic alloy. In a cyclic tensile test in the stress plateau region caused by stress-induced martensite and reverse transformations after hydrogen charging, a further decrease in the critical stress for the martensite transformation is observed. In addition, the number of cycles to fracture for a trained specimen is significantly larger than that for a non-trained specimen. Since most of the charged hydrogen is preferentially trapped in defects induced by training, the hydrogen embrittlement is considerably suppressed as a result of decreasing interactions between the hydrogen and the transformation. The present results indicate that hydrogen in a solid solution more strongly interacts with the stress-induced martensite transformation than hydrogen trapped in defects, thereby further enhancing the hydrogen embrittlement related to phase transformations. 相似文献
68.
Brett O’Neill S.J. 《The Journal of religious ethics》2022,50(1):103-122
The massive scale of forced displacement across the globe discloses the fractured state of the modern international order. Francisco de Vitoria’s theological approach to the law of nations, in the context of the Spanish conquest of the Americas, had a significant influence on this order’s development. This paper argues that recovering his innovative insights today can help refurbish a collective sense of international responsibility for refugees. Vitoria’s bold assertion of indigenous Americans’ dominion affirmed all human beings as members of a world commonwealth with equal claims to basic rights. The “right to travel” he articulated, by its orientation to “natural partnership and communication,” can promote refugee rights and global fraternity. 相似文献
69.
Rev’d Ian StJohn Fisher Ph.D. 《Science and engineering ethics》1996,2(3):335-344
Religion, defined as ‘the idea of a state that transcends ourselves and our world and the working out of the consequences
of that idea’, may influence the ethical thinking of scientists and engineers in two ways. The first is at the level of the
individual and how personal beliefs affect the choice of research, design or development projects, relationships with other
researchers and the understandings of the consequences of research on other aspects of life. The second level is that of the
social and cultural setting in which scientists and engineers work; how society decides which research to sponsor, how to
apply the results of scientific discovery and which technology it chooses to develop and for what purposes. In neither of
these areas is religious belief a necessary condition for scientists and engineers to pursue one course of action rather than
another. The existence of religious belief within the individual and society is, though, part of the ethical framework in
which scientist and engineers work and therefore something to which attention should be paid. Religion provides a particular
perspective on what should be. Conversely science and technology provide information on the nature of the person and the universe
in which we live, which must be taken into account when theologians and religious moralists apply their ethical norms and
principles. 相似文献
70.
This paper reports on a study of the relationship between demographic, personality, and attitudinal variables and impulsive buying (a consumer's tendency to buy spontaneously, unreflectively, and immediately); using secondary analysis of data from common participants in two large national surveys of British adults: one survey contributing data on impulsive buying, demographics, and money attitudes; and the second, a Big Five personality trait measure. In particular, we focus on the attitudes characterized by the extent to which individuals associate money with security, freedom, power, and love. Younger females and those with higher household income were more likely to engage in impulsive buying. Correlational and regression analysis showed that those high on Neuroticism and Extraversion and those low on Conscientiousness were more likely to be impulse buyers. All four money attitudes were related to impulsive buying (Money as Security most strongly). A hierarchical regression indicated that demographic variables accounted for 3 percent, personality a further 9 percent, and money attitudes a further 13 percent of the variance, showing that these three sets of variables accounted for around a quarter of the variance. Implications are considered for educational and therapeutic interventions in reducing maladaptive impulsive buying. 相似文献