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Processing Resources (processing + resource)

Distribution by Scientific Domains

Medical Sciences	33%

Selected Abstracts

Antisense oligodeoxynucleotide-induced suppression of basal forebrain NMDA-NR1 subunits selectively impairs visual attentional performance in rats

EUROPEAN JOURNAL OF NEUROSCIENCE, Issue 1 2001
Janita Turchi
Abstract It is generally agreed that basal forebrain neuronal circuits contribute to the mediation of the ability to detect, select and discriminate signals, to suppress the processing of irrelevant information, and to allocate processing resources to competing tasks. Rats were trained in a task designed to assess sustained attention, or in a cued discrimination task that did not tax attentional processes. Animals were equipped with guide cannula to infuse bilaterally antisense oligodeoxynucleotides (ODNs) against the N -methyl- d -aspartate (NMDA) NR1 subunits, or missense ODNs, into the substantia innominata of the basal forebrain. Infusions of antisense or missense ODNs did not affect cued visual discrimination performance. Infusions of antisense ODNs dose-dependently impaired sustained attention performance by selectively decreasing the animals' ability to detect signals while their ability to reject nonsignal trials remained unchanged. The detrimental attentional effects of antisense infusions were maximal 24 h after the third and final infusion, and performance returned to baseline 24 h later. Missense infusions did not affect attentional performance. Separate experiments demonstrated extensive suppression of NR1 subunit immunoreactivity in the substantia innominata. Furthermore, infusions of antisense did not produce neurotoxic effects in that region as demonstrated by the Fluoro-Jade method. The present data support the hypothesis that NMDA receptor (NMDAR) stimulation in the basal forebrain, largely via glutamatergic inputs originating in the prefrontal cortex, represents a necessary mechanism to activate the basal forebrain corticopetal system for mediation of attentional performance. [source]

Effects of Word and Fragment Writing During L2 Vocabulary Learning

FOREIGN LANGUAGE ANNALS, Issue 4 2007
Joe Barcroft
This study examined how writing (copying) target words and word fragments affects intentional second language (L2) vocabulary learning. English-speaking first-semester learners ofSpanish attempted to learn 24 Spanish nouns via word-picture repetition in three conditions: (1) word writing, (2) fragment writing, and (3) no writing. After the learning phase, the participants completed productive (picture-to-L2) and recpectively oriented (L2-to-first language) posttests. Vocabulary learning scores in the no-writing condition were higher than in the other two conditions and higher in the word-writing condition than in the fragment-writing condition. These fmdings provide new evidence on how forced Output without access to meaning can detract from early word learning by exhausting processing resources needed to encode new word forms. The pedagogical implications of the study call for language instructors to rethink the practice of encouraging students to write down a word to remember it. [source]

Second Language Vocabulary Acquisition: A Lexical Input Processing Approach

FOREIGN LANGUAGE ANNALS, Issue 2 2004
Article first published online: 31 DEC 200, Joe Barcroft PhD
These principles emphasize presentation of new words as input, allocation of limited processing resources during vocabulary acquisition, distinct components of vocabulary knowledge (e.g., form, meaning, mapping), and appropriate types of instruction for different stages of development. Empirical support is included. [source]

Cognitive deficits in narcolepsy

JOURNAL OF SLEEP RESEARCH, Issue 3 2006
A. NAUMANN
Summary The aim of the investigations was to explore the nature and the severity of cognitive deficits in narcolepsy patients. In two studies, narcolepsy patients were compared with matched control subjects on a range of attention, memory and executive control tasks. Impairments were only observed on attention and executive function tasks which involved higher demands on inhibition or task management abilities whereas relatively routine memory and attention tasks yielded intact performance in narcolepsy patients. The overall pattern of results indicates an executive control deficit in narcolepsy which might be related to a reduction of available cognitive processing resources because of the need for continuous allocation of resources to monitoring and maintenance of vigilance. [source]

When consumers follow their feelings: The impact of affective or cognitive focus on the basis of consumers' choice

PSYCHOLOGY & MARKETING, Issue 12 2006
Martin Scarabis
The authors assumed that automatic preferences based on lower-order affective processes have a greater impact on choice when people focus on their affective response to choice options (affective focus) than when they try to find reasons for their preferences (cognitive focus). They further supposed that the impact of the focus during decision making is less important when the cognitive resources of consumers are constrained. In an experiment, participants had to choose between two options while the cognitive or affective focus and processing resources were manipulated. Measures of automatic preferences correlated with choice under an affective, but not under a cognitive, focus. In contrast to expectations, this effect of focus was not moderated by the manipulation of processing resources. Interest-ingly, the automatic measures contributed to the prediction of choice under an affective focus independently and apart from self-report measures. © 2006 Wiley Periodicals, Inc. [source]

Divergence of Fine and Gross Motor Skills in Prelingually Deaf Children: Implications for Cochlear Implantation,

THE LARYNGOSCOPE, Issue 8 2006
David L. Horn MD
Abstract Objective: The objective of this study was to assess relations between fine and gross motor development and spoken language processing skills in pediatric cochlear implant users. Study Design: The authors conducted a retrospective analysis of longitudinal data. Methods: Prelingually deaf children who received a cochlear implant before age 5 and had no known developmental delay or cognitive impairment were included in the study. Fine and gross motor development were assessed before implantation using the Vineland Adaptive Behavioral Scales, a standardized parental report of adaptive behavior. Fine and gross motor scores reflected a given child's motor functioning with respect to a normative sample of typically developing, normal-hearing children. Relations between these preimplant scores and postimplant spoken language outcomes were assessed. Results: In general, gross motor scores were found to be positively related to chronologic age, whereas the opposite trend was observed for fine motor scores. Fine motor scores were more strongly correlated with postimplant expressive and receptive language scores than gross motor scores. Conclusions: Our findings suggest a disassociation between fine and gross motor development in prelingually deaf children: fine motor skills, in contrast to gross motor skills, tend to be delayed as the prelingually deaf children get older. These findings provide new knowledge about the links between motor and spoken language development and suggest that auditory deprivation may lead to atypical development of certain motor and language skills that share common cortical processing resources. [source]