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31.
32.
Davis CJ Bowers JS 《Journal of experimental psychology. Human perception and performance》2006,32(3):535-557
Five theories of how letter position is coded are contrasted: position-specific slot-coding, Wickelcoding, open-bigram coding (discrete and continuous), and spatial coding. These theories make different predictions regarding the relative similarity of three different types of pairs of letter strings: substitution neighbors, neighbors-once-removed, and double-substitution neighbors. In Experiment 1, we used an illusory word paradigm and found that neighbor-once-removed similarity contexts resulted in fewer illusory word reports than substitution neighbors but more illusory words than double-substitution neighbors. In Experiments 2 and 3, we used a masked form priming technique with a lexical-decision task. The pattern of facilitation was as predicted by spatial coding but was incompatible with slot-coding, Wickelcoding, and both versions of open-bigram coding. These results provide further support for the SOLAR (self-organizing lexical aquisition and recognition) model of visual word identification. 相似文献
33.
Henry Bowers 《The Journal of genetic psychology》2013,174(1):232-234
34.
Shelia M. Kennison Elaine C. Fernandez J. Michael Bowers 《Journal of psycholinguistic research》2014,43(2):105-124
The research investigated the roles of semantic and phonological processing in word production. Spanish–English bilingual individuals produced English target words when cued with definitions that were also written in English. When the correct word was not produced, a secondary task was performed in which participants rated the ease of pronunciation of a Spanish prime word. We varied the relatedness between target and prime words. In related conditions, the target and prime words were cognates (i.e., similar in meaning and sound), false cognates (i.e., similar in sound, but different in meaning), or noncognates (i.e., similar in meaning, but different in sound). In unrelated conditions, target and primes were dissimilar in sound and meaning. The results showed that participants’ performance was influenced by semantic as well as phonological information. These results provided evidence that semantic as well as phonological information can influence word production, as is predicted by memory models in which representations for semantic and phonological levels of representation are interconnected. 相似文献
35.
Bowers JS 《Cognitive psychology》2002,45(3):413-445
One of the central claims associated with the parallel distributed processing approach popularized by D.E. Rumelhart, J.L. McClelland and the PDP Research Group is that knowledge is coded in a distributed fashion. Localist representations within this perspective are widely rejected. It is important to note, however, that connectionist networks can learn localist representations and many connectionist models depend on localist coding for their functioning. Accordingly, a commitment to distributed representations should be considered a specific theoretical claim regarding the structure of knowledge rather than a core principle, as often assumed. In this paper, it is argued that there are fundamental computational and empirical challenges that have not yet been addressed by distributed connectionist theories that are readily accommodated within localist approaches. This is highlighted in the context of modeling word and nonword naming, the domain in which some of the strongest claims have been made. It is shown that current PDP models provide a poor account of naming monosyllable items, and that distributed representations make it difficult for these models to scale up to more complex language phenomena. At the same time, models that learn localist representations are shown to hold promise in supporting many of the core reading and language functions on which PDP models fail. It is concluded that the common rejection of localist coding schemes within connectionist architectures is premature. 相似文献
36.
Alice Ann Holland Carroll W. Hughes Lana Harder Cheryl Silver Daniel C. Bowers Peter L. Stavinoha 《Child neuropsychology》2016,22(5):570-586
It has been proposed previously that extrinsic motivation may enable survivors of childhood medulloblastoma to significantly improve aspects of neurocognitive performance. In healthy populations, enhanced motivation has been shown to promote academic fluency, a domain likely more relevant to the educational outcomes of pediatric medulloblastoma survivors than academic skill development. The present study investigates the effect of enhanced extrinsic motivation on fluent (i.e., accurate and efficient) academic performance in pediatric medulloblastoma survivors. Participants were 36 children, ages 7–18, who had completed treatment for medulloblastoma. Participants completed a neuropsychological battery that included administration of equivalent tasks on Forms A and B of the Woodcock-Johnson III Tests of Achievement. Half were randomly assigned to an incentive condition prior to the administration of Form B. Provision of a performance-based incentive resulted in statistically significant improvement, but not normalization of function, in performance on measures of academic fluency. No demographic, treatment-related, academic, neuropsychological, or self-perception variables predicted response to incentive. Findings suggest that academic performance of survivors may significantly improve under highly motivating conditions. In addition to implications for educational services, this finding raises the novel possibility that decreased motivation represents an inherent neuropsychological deficit in this population and provides a rationale for further investigation of factors affecting individual differences in motivational processes. Further, by examining effort in a context where effort is not inherently suspect, present findings also significantly contribute to the debate regarding the effects of effort and motivation on neuropsychological performance. 相似文献
37.
Naugle KM Hass CJ Bowers D Janelle CM 《Cognitive, affective & behavioral neuroscience》2012,12(1):207-219
The purpose of the present study was to determine the impact of manipulating emotional state on gait initiation in persons
with Parkinson’s disease (PD) and healthy older adults. Following the presentation of pictures that are known to elicit specific
emotional responses, participants initiated gait and continued to walk for several steps at their normal pace. Reaction time,
the displacement and velocity of the center of pressure (COP) trajectory during the preparatory postural adjustments, and
length and velocity of the first two steps were measured. Analysis of the gait initiation measures revealed that exposure
to (1) threatening pictures, relative to all other pictures, speeded the initiation of gait for PD patients and healthy older
adults; (2) approach-oriented emotional pictures (erotic and happy people), relative to withdrawal-oriented pictures, facilitated
the anticipatory postural adjustments of gait initiation for PD patients and healthy older adults, as evidenced by greater
displacement and velocity of the COP movement; and (3) emotional pictures modulated gait initiation parameters in PD patients
to the same degree as in healthy older adults. Collectively, these findings hold significant implications for understanding
the circuitry underlying the manner by which emotions modulate movement and for the development of emotion-based interventions
designed to maximize improvements in gait initiation for individuals with PD. 相似文献
38.
39.
Three experiments assessed the role of verbal and visuo‐spatial working memory in supporting long‐term repetition priming for written words. In Experiment 1, two priming tasks (word stem completion and category‐exemplar production) were included with three levels of load on working memory: (1) without memory load, (2) memory load that involved storing a string of six digits, and (3) memory load that involved storing a graphic shape. Experiments 2 and 3 compared the effects of a verbal (Experiment 2) or a visual (Experiment 3) working memory load at encoding on both an implicit (word stem completion) and an explicit test (cued recall). The results show no effect of memory load in any of the implicit memory tests, suggesting that priming does not rely on working memory resources. By contrast, loading working memory at encoding causes a significant disruptive effect on the explicit memory test for words when the load is verbal but not visual. 相似文献
40.
The use of performance-enhancing drugs is a significant problem in sport. It cheats clean athletes of their hard-earned rewards from perfecting their skills though dedication and hard work. It defrauds fans by substituting a distorted playing field for a true competition. Anti-doping agencies have been charged with enforcing drug policies, primarily through the use of drug testing programs. We propose that drug testing, while important, is not sufficient to achieve deterrence. Engaging the principles of perceptual deterrence and development of a moral community of athletes can greatly enhance compliance with rules. 相似文献