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191.
192.
When spiders appear suddenly: spider-phobic patients are distracted by task-irrelevant spiders 总被引:4,自引:0,他引:4
Fear is thought to facilitate the detection of threatening stimuli. Few studies have examined the effects of task-irrelevant phobic cues in search tasks that do not involve semantic categorization. In a combined reaction time and eye-tracking experiment we investigated whether peripheral visual cues capture initial attention and distract from the execution of goal-directed eye movements. Twenty-one spider-phobic patients and 21 control participants were instructed to search for a color singleton while ignoring task-irrelevant abrupt-onset distractors which contained either a small picture of a spider (phobic), a flower (non-phobic, but similar to spiders in shape), a mushroom (non-phobic, and not similar to spiders in shape), or no picture. As expected, patients' reaction times were longer on trials with spider distractors. However, eye movements revealed that this was not due to attentional capture by spider distractors; patients more often fixated on all distractors with pictures, but their reaction times were delayed by longer fixation durations on spider distractors. These data do not support automatic capture of attention by phobic cues but suggest that phobic patients fail to disengage attention from spiders. 相似文献
193.
Karl-Heinz Renner Sibylle EnzHeiko Friedel Georg MerzbacherLothar Laux 《Journal of research in personality》2008
The histrionic self-presentation style is introduced as a concept that describes specific individual differences in self-presentation, namely, performing explicit As-If-behaviors in everyday interactions. The As-If-Scale (AIS), a trait measure of histrionic self-presentation, shows good internal consistency and test–retest reliability as well as convergent and discriminant validity in several samples. Construct validation involved determining relations between the AIS and the Big Five, histrionic role concepts, motives, competencies, humor and ambivalence. Furthermore, the AIS yielded incremental validity in predicting behaviors related to histrionic self-presentation over and above the self-monitoring construct. The possible impact of the histrionic style for research on self-presentation and other fields is discussed. It is argued that histrionic phenomena are pervasive within many facets of our western culture and therefore deserve further examination. 相似文献
194.
Georg Northoff 《Phenomenology and the Cognitive Sciences》2008,7(4):501-527
The James–Lange theory considers emotional feelings as perceptions of physiological body changes. This approach has recently
resurfaced and modified in both neuroscientific and philosophical concepts of embodiment of emotional feelings. In addition
to the body, the role of the environment in emotional feeling needs to be considered. I here claim that the environment has
not merely an indirect and thus instrumental role on emotional feelings via the body and its sensorimotor and vegetative functions.
Instead, the environment may have a direct and non-instrumental, i.e., constitutional role in emotional feelings; this implies
that the environment itself in the gestalt of the person–environment relation is constitutive of emotional feeling rather
than the bodily representation of the environment. Since the person–environment relation is crucial in this approach, I call
it the relational concept of emotional feeling. After introducing the relational concept of emotional feeling, the present
paper investigates the neurophilosophical question whether current neuroimaging data on human emotion processing and anatomical
connectivity are empirically better compatible with the “relational” or the “embodied” concept of emotional feeling. These
data lend support to the empirical assumption that neural activity in subcortical and cortical midline regions code the relationship
between intero- and exteroceptive stimuli in a relational mode, i.e. their actual balance, rather than in a translational
mode, i.e., by translating extero- into interoceptive stimulus changes. Such intero-exteroceptive relational mode of neural
coding may have implications for the characterization of emotional feeling with regard to phenomenal consciousness and intentionality.
I therefore conclude that the here advanced relational concept of emotional feeling may be considered neurophilosophically
more plausible and better compatible with current neuroscientific data than the embodied concept as presupposed in the James–Lange
theory and its modern neuroscientific and philosophical versions.
相似文献
Georg NorthoffEmail: |
195.
The praxic semantic system comprises a conceptual knowledge system, which stores functional information about objects, and an action knowledge system, which stores information about the correct manipulation of objects. Moreover, mechanical problem solving abilities permit to take advantages from objects structure to use unfamiliar tools or discover alternative ways of using familiar tools. This study aims at investigating whether conceptual knowledge, action knowledge and mechanical problem solving abilities intervene in the production of gestures with objects (i.e. pantomimes and object use) by testing a group of brain damaged patients. Results showed that the mechanical problem solving abilities are not sufficient to produce pantomimes and that only severe deficits in the praxic semantic system would affect the production of these gestures. Furthermore, a double dissociation was observed between mechanical problem solving abilities and the capacity to use multiple objects. Overall, the results indicate that the praxic semantic system can be disrupted at different levels, suggesting that the semantic system for object has to be conceived as fractionated in different entities. 相似文献
196.
Finding a probable explanation for observed symptoms is a highly complex task that draws on information retrieval from memory. Recent research suggests that observed symptoms are interpreted in a way that maximizes coherence for a single likely explanation. This becomes particularly clear if symptom sequences support more than one explanation. However, there are no existing process data available that allow coherence maximization to be traced in ambiguous diagnostic situations, where critical information has to be retrieved from memory. In this experiment, we applied memory indexing, an eye-tracking method that affords rich time-course information concerning memory-based cognitive processing during higher order thinking, to reveal symptom processing and the preferred interpretation of symptom sequences. Participants first learned information about causes and symptoms presented in spatial frames. Gaze allocation to emptied spatial frames during symptom processing and during the diagnostic response reflected the subjective status of hypotheses held in memory and the preferred interpretation of ambiguous symptoms. Memory indexing traced how the diagnostic decision developed and revealed instances of hypothesis change and biases in symptom processing. Memory indexing thus provided direct online evidence for coherence maximization in processing ambiguous information. 相似文献
197.
Goldenberg G 《Trends in cognitive sciences》2006,10(3):94-5; author reply 95-6
198.
Tone detection thresholds for a 10-kHz tone in NMRI mice were determined in psychoacoustic experiments using both a constant-stimuli
procedure and a two-down/one-up adaptive-tracking procedure in the same subjects and applying identical threshold criteria
(70.7% response probability). Constant-stimuli thresholds were on average 24 dB lower than adaptive-tracking thresholds, and
there was a trend indicating that constant-stimuli thresholds were less variable than adaptive-tracking thresholds. Furthermore,
in the constant-stimuli procedure the number of trials constituting the psychometric function could be reduced from 100 to
50 trials without a large loss of accuracy of threshold determination. In the constant-stimuli procedure, the threshold value
was affected by the threshold criteria. The lowest and least variable constant-stimuli thresholds were obtained by applying
signal detection theory and a criterion ofd′=1. Thus, the constant-stimuli procedure in combination with signal detection theory appears to be better suited than the
adaptive-tracking procedure to determine auditory sensory thresholds. 相似文献
199.
Northoff G 《The Behavioral and brain sciences》2002,25(5):555-77; discussion 578-604
Differential diagnosis of motor symptoms, for example, akinesia, may be difficult in clinical neuropsychiatry. Symptoms may be either of neurologic origin, for example, Parkinson's disease, or of psychiatric origin, for example, catatonia, leading to a so-called "conflict of paradigms." Despite their different origins, symptoms may appear more or less clinically similar. Possibility of dissociation between origin and clinical appearance may reflect functional brain organisation in general, and cortical-cortical/subcortical relations in particular. It is therefore hypothesized that similarities and differences between Parkinson's disease and catatonia may be accounted for by distinct kinds of modulation between cortico-cortical and cortico-subcortical relations. Catatonia can be characterized by concurrent motor, emotional, and behavioural symptoms. The different symptoms may be accounted for by dysfunction in orbitofrontal-prefrontal/parietal cortical connectivity reflecting "horizontal modulation" of cortico-cortical relation. Furthermore, alteration in "top-down modulation" reflecting "vertical modulation" of caudate and other basal ganglia by GABA-ergic mediated orbitofrontal cortical deficits may account for motor symptoms in catatonia. Parkinson's disease, in contrast, can be characterized by predominant motor symptoms. Motor symptoms may be accounted for by altered "bottom-up modulation" between dopaminergic mediated deficits in striatum and premotor/motor cortex. Clinical similarities between Parkinson's disease and catatonia with respect to akinesia may be related with involvement of the basal ganglia in both disorders. Clinical differences with respect to emotional and behavioural symptoms may be related with involvement of different cortical areas, that is, orbitofrontal/parietal and premotor/motor cortex implying distinct kinds of modulation--"vertical" and "horizontal" modulation, respectively. 相似文献
200.
International Journal for Philosophy of Religion - Panenetheism is the claim that God and the cosmos are intimately inter-related, with the cosmos being in God and God being in the cosmos. What... 相似文献