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941.
Zehetleitner M Goschy H Müller HJ 《Journal of experimental psychology. Human perception and performance》2012,38(4):941-957
When searching for a "pop-out" target, interference from a salient but irrelevant distractor can be reduced or even prevented under certain circumstances. Here, five experiments were conducted to further our understanding of three different aspects of top-down interference reduction: first, whether or not qualitatively different search modes can account for different reduction patterns; second, whether distractor practice plays a causal role in reduction; and third, how specific reduction is, that is, whether interference by intradimensional distractors can be reduced as effectively as interference by cross-dimensional distractors. The results provide evidence that interference reduction does not critically depend on the implementation of a feature search mode, but rather on practice with the distractor, that is, the acquisition of an effective suppression strategy. In addition, they suggest that interference reduction is based on hierarchically organized feature weighting ("dimension weighting"), rather than on completely independent feature weighting. 相似文献
942.
943.
Bürki A Gaskell MG 《Journal of experimental psychology. Learning, memory, and cognition》2012,38(3):617-631
The present study investigated the lexical representations underlying the production of English schwa words. Two types of schwa words were compared: words with a schwa in poststress position (e.g., mackerel), whose schwa and reduced variants differ in a categorical way, and words with a schwa in prestress position (e.g., salami), whose variants differ in a noncategorical way. Participants named pseudohomophones and matched pseudowords corresponding to schwa and reduced variants of these words. Results revealed an advantage for pseudohomophones over matched pseudowords for both variants of poststress schwa words but only for schwa variants of prestress schwa words. As the pseudohomophone advantage is assumed to reflect the activation of a phonologically matching stored phonological representation, these results suggest that both variants of poststress schwa words are lexically represented while only schwa variants of prestress schwa words are. This result extends the proposal that words with two categorically distinct variants are stored in the production lexicon with 2 representations to another language and demonstrates that this 2-lexeme account does not generalize to pronunciation variants differing from one another in a noncategorical fashion. This finding challenges one of the widely shared assumption of generative models of word production: that content words have only 1 phonological representation. On the other hand, it provides further evidence in favor of another fundamental assumption of these models: that lexical representations are abstract sets of segments rather than fully detailed exemplars. 相似文献
944.
Voluntary movements embrace both intentional, conscious and post-intentional, largely automatic processes. Here, we examine
these types of processes and the relations between them during preparation and execution of voluntary movements. First, a
general overview is given about how intentional and post-intentional components are interleaved to enable successful control
of purposeful movements. Second, we briefly describe some post-intentional processes that are triggered by preceding intentions.
Third, we discuss findings according to which such post-intentional processes or their results can become accessible to conscious
awareness. Under such conditions, automatic and conscious processes can co-occur. We show that intentional interventions into
post-intentional processes can be overridden by automatic processes, can interfere with automatic processes and can be independent
so that their outcomes add to those of automatic processes. 相似文献
945.
946.
Adrian Wüthrich 《Journal for General Philosophy of Science》2012,43(2):281-287
In this note, I briefly review Lyre’s (2008) analysis and interpretation of the Higgs mechanism. Contrary to Lyre, I maintain that, on the proper understanding of the term, the Higgs mechanism refers to a physical process in the course of which gauge bosons acquire a mass. Since also Lyre’s worries about imaginary masses can be dismissed, a realistic interpretation of the Higgs mechanism seems viable. While it may remain an open empirical question whether the Higgs mechanism did actually occur in the early history of the universe and what the details of the mechanism are, I claim that the term can certainly refer to a physical process. 相似文献
947.
Christian Wüthrich 《Journal for General Philosophy of Science》2012,43(2):223-241
More often than not, recently popular structuralist interpretations of physical theories leave the central concept of a structure insufficiently precisified. The incipient causal sets approach to quantum gravity offers a paradigmatic case of a physical theory predestined to be interpreted in structuralist terms. It is shown how employing structuralism lends itself to a natural interpretation of the physical meaning of causal set theory. Conversely, the conceptually exceptionally clear case of causal sets is used as a foil to illustrate how a mathematically informed rigorous conceptualization of structure serves to identify structures in physical theories. Furthermore, a number of technical issues infesting structuralist interpretations of physical theories such as difficulties with grounding the identity of the places of highly symmetrical physical structures in their relational profile and what may resolve these difficulties can be vividly illustrated with causal sets. 相似文献
948.
PD Dr. Josef B?uml J. Baumg?rtner T. Frob?se A. Gsottschneider Z. Keller S. Lüscher M. Scherr G. Pitschel-Walz T. Jahn 《Psychotherapeut》2012,57(4):301-312
Background
The effectiveness of psychoeducation groups for people with schizophrenia is well documented; however, there are no studies which examined patient participation behavior although this behavior might be critical for accomplishment of the therapeutic goals. This article presents newly developed 4-point Likert scale, the participation quality rating scale (PQRS), together with initial results on practicability, validity, change sensitivity, sociodemographic and clinical correlates and on the question whether participation quality might be a significant predictor of the short and long-term outcome of psychoeducation.Patient and methods
Within the framework of the Munich Study “Cognitive Determinants of Psychoeducation and Information in Schizophrenic Psychoses” (COGPIP) the individual participation behavior of 97 patients with schizophrenia was examined after each psychoeducational group session (4 weeks). Individual mean PQRS scores were correlated with sociodemographic, anamnestic and clinical variables. In addition to change sensitivity the ability of the scale to predict the acquisition of illness knowledge during psychoeducation was examined as well as readmission during a 9-month follow-up period and the psychopathological endpoint (positive and negative syndrome scale, PANSS).Results
Practicability and change sensitivity of the PQRS were found to be sufficient. Significant correlations with independently rated illness insight and medication compliance indicated a construct validity of the scale. Higher age, female sex and less pronounced psychopathological symptoms (PANSS) were associated with better participation behavior. Even patients with clearly impaired participation behavior profited from psychoeducation in that they were able to catch up with the delay with regard to illness knowledge. However, the PQRS was not a predictor of readmission during the 9-month follow-up period or of psychopathological endpoints.Conclusions
The PQRS is qualified as a new tool for the standardized assessment of participation behavior in people with schizophrenia attending psychoeducation groups. The scale can be applied in research as well as clinical contexts in order to further improve understanding of how psychoeducation works and how this kind of supplementary therapy could become even more effective. 相似文献949.
Dr. Susanne Karch Stephan Heinzel Oliver Pogarell Günter Schiepek 《Psychotherapeut》2012,57(3):204-212
In the last few years the investigation of the neurobiological basis of psychotherapeutic treatments has gained importance. Therapy-associated functional changes have been studied in a number of different psychiatric diseases. It has been shown that diseases with a central role of emotions (e.g. depression, anxiety disorders, borderline personality disorder) often demonstrate dysfunctions in brain areas that are linked to emotional regulation. Psychotherapeutic interventions can lead to a kind of normalization of brain responses in these areas (e.g. amygdala, ventromedial prefrontal cortex, anterior cingulate cortex, orbitofrontal cortex). In addition, therapy-associated transformations were also demonstrated in areas which are related to attention processes and visual perception. Other studies have aimed at finding neurobiological parameters that can be used to predict a therapeutic outcome or to choose between various therapeutic strategies. For instance, in depression, the amygdala and the anterior cingulate cortex are assumed to play a major role. Altogether, knowledge on the neurobiological basis of psychotherapeutic procedures is limited. A comparatively small number of studies and several methodological problems (e.g. small sample sizes, insufficient control groups, variability of methods used) make it difficult to propose reliable statements. 相似文献
950.
We examined how a highly familiar environmental space--one's city of residence--is represented in memory. Twenty-six participants faced a photo-realistic virtual model of their hometown and completed a task in which they pointed to familiar target locations from various orientations. Each participant's performance was most accurate when he or she was facing north, and errors increased as participants' deviation from a north-facing orientation increased. Pointing errors and latencies were not related to the distance between participants' initial locations and the target locations. Our results are inconsistent with accounts of orientation-free memory and with theories assuming that the storage of spatial knowledge depends on local reference frames. Although participants recognized familiar local views in their initial locations, their strategy for pointing relied on a single, north-oriented reference frame that was likely acquired from maps rather than experience from daily exploration. Even though participants had spent significantly more time navigating the city than looking at maps, their pointing behavior seemed to rely on a north-oriented mental map. 相似文献