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401.
The present study investigates the effects of word category (nouns versus verbs) and their subcategories on naming latencies in German, with a focus on the influence of lexical parameters on naming performance. The experimental material met linguistic construction criteria and was carefully matched for age of spontaneous production, frequency, and name agreement. Additional lexical parameters (objective age-of-acquisition, word length, visual complexity, imageability) were obtained. The results demonstrated a clear effect of word category on naming latencies. This effect was supported by two different observations. First, there was evidence for category and subcategory effects in naming: nouns were named faster than verbs, and intransitive verbs were named faster than transitive verbs. Second, while objective age-of-acquisition (naming age) turned out to be an important predictor of reaction times for both word categories, naming latencies for nouns and verbs were affected differentially by other lexical parameters. The results are discussed with respect to current controversies on the noun-verb-asymmetry. 相似文献
402.
The present research examines individual differences in intention initiation. State- compared to action-oriented persons show an intention superiority effect for the cognitive representation of intentions [Goschke, T., & Kuhl, J. (1993). Representation of intentions: Persisting activation in memory. Journal of Experimental Psychology: Learning, Memory, and Cognition, 19, 1211–1226], but at the same time have a paradoxical deficit in initiating and carrying them out under demanding conditions. The present two experiments focus on intention initiation. Experiment 1 used a modified event-based paradigm of prospective memory, pre-cuing prospective actions with words varying in association to the target word. State-oriented participants had longer latencies in initiating uncued compared to precued actions under low-positive affect (high listlessness). In Experiment 2, we used a key-pressing task under high vs. low cognitive load (uncompleted vs. completed intention). State-oriented participants under high load had longer latencies when they chose by themselves which of two goals to pursue, compared to an External-Cue condition. Action-oriented participants showed efficient performance in each experiment. The intention-initiation deficit of state-oriented participants was related to higher levels of listlessness (first experiment) or to high load (second experiment) suggesting that motivational factors interact with volitional impairments. These results are interpreted in terms of Personality Systems Interaction theory (Kuhl, 2000). 相似文献
403.
The phenomenology of action: a conceptual framework 总被引:4,自引:0,他引:4
Pacherie E 《Cognition》2008,107(1):179-217
After a long period of neglect, the phenomenology of action has recently regained its place in the agenda of philosophers and scientists alike. The recent explosion of interest in the topic highlights its complexity. The purpose of this paper is to propose a conceptual framework allowing for a more precise characterization of the many facets of the phenomenology of agency, of how they are related and of their possible sources. The key assumption guiding this attempt is that the processes through which the phenomenology of action is generated and the processes involved in the specification and control of action are strongly interconnected. I argue in favor of a three-tiered dynamic model of intention, link it to an expanded version of the internal model theory of action control and specification, and use this theoretical framework to guide an analysis of the contents, possible sources and temporal course of complementary aspects of the phenomenology of action. 相似文献
404.
The preparation of eye or hand movements enhances visual perception at the upcoming movement end position. The spatial location of this influence of action on perception could be determined either by goal selection or by motor planning. We employed a tool use task to dissociate these two alternatives. The instructed goal location was a visual target to which participants pointed with the tip of a triangular hand-held tool. The motor endpoint was defined by the final fingertip position necessary to bring the tool tip onto the goal. We tested perceptual performance at both locations (tool tip endpoint, motor endpoint) with a visual discrimination task. Discrimination performance was enhanced in parallel at both spatial locations, but not at nearby and intermediate locations, suggesting that both action goal selection and motor planning contribute to visual perception. In addition, our results challenge the widely held view that tools extend the body schema and suggest instead that tool use enhances perception at those precise locations which are most relevant during tool action: the body part used to manipulate the tool, and the active tool tip. 相似文献
405.
Rosset E 《Cognition》2008,108(3):771-780
406.
Ecological and sensorimotor theories of perception build on the notion of action-dependent invariants as the basic structures underlying perceptual capacities. In this paper we contrast the assumptions these theories make on the nature of perceptual information modulated by action. By focusing on the question, how movement specifies perceptual information, we show that ecological and sensorimotor theories endorse substantially different views about the role of action in perception. In particular we argue that ecological invariants are characterized with reference to transformations produced in the sensory array by movement: such invariants are transformation-specific but do not imply motor-specificity. In contrast, sensorimotor theories assume that perceptual invariants are intrinsically tied to specific movements. We show that this difference leads to different empirical predictions and we submit that the distinction between motor equivalence and motor-specificity needs further clarification in order to provide a more constrained account of action/perception relations. 相似文献
407.
408.
If one formulates Helmholtz’s ideas about perception in terms of modern-day theories one arrives at a model of perceptual
inference and learning that can explain a remarkable range of neurobiological facts. Using constructs from statistical physics
it can be shown that the problems of inferring what cause our sensory inputs and learning causal regularities in the sensorium
can be resolved using exactly the same principles. Furthermore, inference and learning can proceed in a biologically plausible
fashion. The ensuing scheme rests on Empirical Bayes and hierarchical models of how sensory information is generated. The
use of hierarchical models enables the brain to construct prior expectations in a dynamic and context-sensitive fashion. This
scheme provides a principled way to understand many aspects of the brain’s organisation and responses. In this paper, we suggest
that these perceptual processes are just one emergent property of systems that conform to a free-energy principle. The free-energy
considered here represents a bound on the surprise inherent in any exchange with the environment, under expectations encoded
by its state or configuration. A system can minimise free-energy by changing its configuration to change the way it samples
the environment, or to change its expectations. These changes correspond to action and perception, respectively, and lead
to an adaptive exchange with the environment that is characteristic of biological systems. This treatment implies that the
system’s state and structure encode an implicit and probabilistic model of the environment. We will look at models entailed
by the brain and how minimisation of free-energy can explain its dynamics and structure. 相似文献
409.
Jeremy I. Skipper Susan Goldin-Meadow Howard C. Nusbaum Steven L. Small 《Brain and language》2007,101(3):260
Speech-associated gestures are hand and arm movements that not only convey semantic information to listeners but are themselves actions. Broca’s area has been assumed to play an important role both in semantic retrieval or selection (as part of a language comprehension system) and in action recognition (as part of a “mirror” or “observation–execution matching” system). We asked whether the role that Broca’s area plays in processing speech-associated gestures is consistent with the semantic retrieval/selection account (predicting relatively weak interactions between Broca’s area and other cortical areas because the meaningful information that speech-associated gestures convey reduces semantic ambiguity and thus reduces the need for semantic retrieval/selection) or the action recognition account (predicting strong interactions between Broca’s area and other cortical areas because speech-associated gestures are goal-direct actions that are “mirrored”). We compared the functional connectivity of Broca’s area with other cortical areas when participants listened to stories while watching meaningful speech-associated gestures, speech-irrelevant self-grooming hand movements, or no hand movements. A network analysis of neuroimaging data showed that interactions involving Broca’s area and other cortical areas were weakest when spoken language was accompanied by meaningful speech-associated gestures, and strongest when spoken language was accompanied by self-grooming hand movements or by no hand movements at all. Results are discussed with respect to the role that the human mirror system plays in processing speech-associated movements. 相似文献
410.
Infants as young as 5 months of age view familiar actions such as reaching as goal-directed (Woodward, 1998), but how do they construe the goal of an actor's reach? Six experiments investigated whether 12-month-old infants represent reaching actions as directed to a particular individual object, to a narrowly defined object category (e.g., an orange dump truck), or to a more broadly defined object category (e.g., any truck, vehicle, artifact, or inanimate object). The experiments provide evidence that infants are predisposed to represent reaching actions as directed to categories of objects at least as broad as the basic level, both when the objects represent artifacts (trucks) and when they represent people (dolls). Infants do not use either narrower category information or spatiotemporal information to specify goal objects. Because spatiotemporal information is central to infants' representations of inanimate object motions and interactions, the findings are discussed in relation to the development of object knowledge and action representations. 相似文献