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51.
The social surrogate hypothesis proposes that people with higher social anxiety (HSA) recruit others to accompany them into social situations. We tested this hypothesis with college roommates using both hypothetical (Study 1) and retrospective (Study 2) measures, while assessing roommate's perceptions of recruitment and how social surrogacy might influence liking between roommates. Across two studies, we found that HSA participants were less likely to enter social situations alone (i.e. higher conditional entry); however, HSA was related to recruitment only when participants considered hypothetical scenarios, not when recruitment was assessed globally or retrospectively. There was little evidence that HSA participants' roommates were aware of these behaviours, although there was preliminary evidence that less social anxiety might increase liking when roommates perceived more conditional entry. We also found preliminary evidence that social anxiety may be negatively related to liking when participants were less likely to recruit an alternate surrogate if their roommate was unavailable. Taken together, these preliminary findings emphasize the importance of studying the surrogacy process from an interpersonal/dyadic perspective and using methods that will differentiate between anticipated (which may be assessed by hypothetical scenarios) and enacted recruitment behaviours. Copyright © 2017 European Association of Personality Psychology 相似文献
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S. Chandra M. K. Samal N. N. Kumar V. M. Chavan S. Raghunathan 《Philosophical Magazine Letters》2017,97(12):504-514
The interaction between a brittle crack and pre-existing void in front of the crack tip was studied in the realm of molecular dynamics simulations at the nanoscale in face centred cubic Al within the framework of embedded-atom method. The results provide corroborative evidence of the fact that presence of a void in front of a running crack deters further crack growth. By performing an extensive series of simulations with different void sizes and crack-void distances coupled with statistical analysis, it has been found that (1) major role of voids is to decrease the fracture stress with increasing void size, in addition to slight increase in strain at which the crack growth occurs and the consequent strain to fracture, (2) fracture stress for a constant void size follows a sinusoidal distribution by varying the crack-void distance and (3) it is the void size that is most crucial in dictating the fracture properties of the material, rather than the void placement. 相似文献
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Niclas Kuper Nick Modersitzki Le Vy Phan John F. Rauthmann 《British journal of psychology (London, England : 1953)》2021,112(1):1-51
Personality psychology has long focused on structural trait models, but it can also offer a rich understanding of the dynamics, processes, mechanisms, and functioning of individual differences or entire persons. The field of personality dynamics, which works towards such an understanding, has experienced a renaissance in the last two decades. This review article seeks to act as a primer of that field. It covers its historical roots, summarizes current research strands – along with their theoretical backbones and methodologies – in an accessible way, and sketches some considerations for the future. In doing so, we introduce relevant concepts, give an overview of different topics and phenomena subsumed under the broad umbrella term ‘dynamics’, and highlight the interdisciplinarity as well as applied relevance of the field. We hope this article can serve as a useful overview for scholars within and outside of personality psychology who are interested in the dynamic nature of human behaviour and experience. 相似文献
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We present an empirically supported theoretical and methodological framework for quantifying the system-level properties of person-plus-tool interactions in order to answer the question: “Are person-plus-tool-systems extended cognitive systems?” Nineteen participants provided perceptual judgments regarding their ability to pass through apertures of various widths while using visual information, blindfolded wielding a rod, or blindfolded wielding an Enactive Torch—a vibrotactile sensory-substitution device for detecting distance. Monofractal, multifractal, and recurrence quantification analyses were conducted to assess features of person-plus-tool movement dynamics. Trials where people utilized the rod or Enactive Torch demonstrated stable “self-similarity,” or indices of healthy and adaptive single systems, regardless of aperture width, trial order, features of the participants’ judgments, and participant characteristics. Enactive Torch trials exhibited a somewhat greater range of dynamic fluctuations than the rod trials, as well as less movement recurrence, suggesting that the Enactive Torch allowed for more exploratory movements. Findings provide support for the notion that person-plus-tool systems can be classified as extended cognitive systems and a framework for quantifying system-level properties of these systems. Implications concerning future research on extended cognition are discussed. 相似文献
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The unfolding argument (UA) was advanced as a refutation of prominent theories, which posit that phenomenal experience is determined by patterns of neural activation in a recurrent (neural) network (RN) structure. The argument is based on the statement that any input–output function of an RN can be approximated by an “equivalent” feedforward-network (FFN). According to UA, if consciousness depends on causal structure, its presence is unfalsifiable (thus non-scientific), as an equivalent FFN structure is behaviorally indistinguishable with regards to any behavioral test. Here I refute UA by appealing to computational theory and cognitive-neuroscience. I argue that a robust functional equivalence between FFN and RN is not supported by the mathematical work on the Universal Approximator theorem, and is also unlikely to hold, as a conjecture, given data in cognitive neuroscience; I argue that an equivalence of RN and FFN can only apply to static functions between input/output layers and not to the temporal patterns or to the network’s reactions to structural perturbations. Finally, I review data indicating that consciousness has functional characteristics, such as a flexible control of behavior, and that cognitive/brain dynamics reveal interacting top-down and bottom-up processes, which are necessary for the mediation of such control processes. 相似文献
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The model of a simple self-reproducing system has been investigated. The current model has been developed in the framework of syser systems. The term syser is the abbreviation of the words “SYstem of SElf-Reproduction”. The syser model can be considered as a reasonable model of the prebiological macromolecular self-reproducing systems. The syser includes a polynucleotide matrix, a replication enzyme, a translation enzyme, and other enzymes and protein. Earlier, we studied the model of sysers with a large number of macromolecules. However, a large number of macromolecules is a certain disadvantage of models of prebiological systems. In order to overcome this disadvantage, a new syser model with a small number of macromolecules has been constructed and investigated in the present work. The macromolecules of the syser are located inside the protocell. Additionally, we consider special macromolecules that provide sysers with energy. There is a mechanism for duplication of protocells. We consider the evolution of the population of sysers. The dynamics of macromolecules in protocells and evolution of sysers populations have been analyzed by means of computer simulation. It was shown that during the evolution of the sysers population, the comparative number and rate of synthesis of macromolecules, which provide protocells with energy, could be increased. The decrease of the synthesis rate of polynucleotide matrices is also possible. 相似文献
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To assess the dynamical effects of creative interaction networks on team creativity evolution, this paper elaborates a theoretical framework that links the key elements of creative interaction networks, including node, edge and network structure, to creativity in teams. The process of team creativity evolution is divided into four phases, including formation, growth, maturity and decline/restart. The importance of domain‐relevant knowledge, creativity‐relevant skill, interaction frequency, interaction length, network density and closeness centrality are emphasized in specific phases of team creativity evolution in a complex creative context. To test our assumptions, a longitudinal study of creative teams in a “Challenge Cup” Creative Business Plan Competition for university students is performed and the full networks of 17 creative entrepreneur teams are mapped. Both static comparison and dynamic analysis are conducted to analyze the relationship between creative interaction networks and team creativity evolution. For specific phases of team creativity evolution, we find confirmation of our predictions. The implications of dynamic creative interaction networks for all the phases of creative teams from formation to decline/restart are discussed. 相似文献