Stimulus Discrimination
Mostrando 1-12 de 127 artigos, teses e dissertações.
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1. Mismatch Negativity in Children: Reference Values
Abstract Introduction The Mismatch Negativity (MMN) auditory evoked potential evaluation is a promising procedure to assess objectively the ability of auditory discrimination. Objective To characterize the latency and amplitude values of MMN in children with normal auditory thresholds and without auditory complaints. Methods Children between 5 and 11 y
Int. Arch. Otorhinolaryngol.. Publicado em: 18/07/2019
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2. Comparison of Pre-Attentive Auditory Discrimination at Gross and Fine Difference between Auditory Stimuli
Abstract Introduction Mismatch Negativity is a negative component of the event-related potential (ERP) elicited by any discriminable changes in auditory stimulation. Objective The present study aimed to assess pre-attentive auditory discrimination skill with fine and gross difference between auditory stimuli. Method Seventeen normal hearing individual
Int. Arch. Otorhinolaryngol.. Publicado em: 2016-12
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3. Auditory Evoked Potentials with Different Speech Stimuli: a Comparison and Standardization of Values
Abstract Introduction Long Latency Auditory Evoked Potentials (LLAEP) with speech sounds has been the subject of research, as these stimuli would be ideal to check individualś detection and discrimination. Objective The objective of this study is to compare and describe the values of latency and amplitude of cortical potentials for speech stimuli in adu
Int. Arch. Otorhinolaryngol.. Publicado em: 2016-06
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4. Assessing restricted stimulus control in typically developing preschool children and bees (Melipona quadrifasciata)
This study established a simple simultaneous discrimination between a pair of two-element compound visual stimuli in children (Experiment 1) and bees (Melipona quadrifasciata, Experiment 2). The contingencies required discriminative control by the compound and the question was whether the accurate stimulus control reached at this level would hold for each in
Psychol. Neurosci.. Publicado em: 2014-06
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5. Exclusion performance in visual simple discrimination in dogs (Canis familiaris)
Choices based on exclusion have been investigated in different species because of its emergent nature, leading to evidence of rudimentary symbolic behavior in non-verbal organisms. Simple discrimination procedures provide a simple method to investigate exclusion performance, in which each trial consists of the simultaneous presentation of two stimuli, one wi
Psychol. Neurosci.. Publicado em: 2014-06
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6. Neurophysiological correlates of color vision: a model
The tree-receptor theory of human color vision accounts for color matching. A bottom-up, non-linear model combining cone signals in six types of cone-opponent cells in the lateral geniculate nucleus (LGN) of primates describes the phenomenological dimensions hue, color strength, and lightness/brightness. Hue shifts with light intensity (the Bezold-Brücke ph
Psychol. Neurosci.. Publicado em: 2013
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7. Desamparo aprendido e imunização em humanos: avaliação metodológica/conceitual e uma proposta experimental / Learned helplessness and immunization in humans: methodological/conceptual evaluation and an experimental proposal
The results of learned helplessness studies with humans have been inconsistent. This is probably due to the systematic contiguity between the end of the aversive stimulus and the immediately preceding response during the uncontrollability session, which mimics an accidental control condition. Three experiments were conducted to establish a procedure with ade
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
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8. Responder por exclusão em treinos de discriminação condicional com estímulos temporais por universitários / Choose by exclusion among university students during training of conditional discrimination with temporal stimuli.
O responder por exclusão vem sendo amplamente investigado e documentado com diferentes populações humanas. O padrão de escolher um estímulo indefinido condicionalmente a um modelo também indefinido, quando existem possibilidades de escolha definidas experimentalmente tem chamado a atenção de estudiosos interessados em processos simbólicos como a aqu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012
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9. Controle de estímulos e formação de classes de estímulos equivalentes em crianças e em indivíduos com Síndrome de Down / Stimulus control and stimulus class formation in children and individuals with Down syndrome
Two studies evaluated emergent stimulus-stimulus relations and selection and rejection controlling relations. Study 1 evaluated controlling relations after two types of conditional discrimination training: standard matching-to-sample (MTS) tasks and tasks using the blank comparison MTS. Participants were five preschool children and two adults and one child w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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10. Ensino de discriminação de acordes baseado em treino de abstração e formação de classes de equivalência
O presente estudo buscou fazer um treinamento de percepção musical para indivíduos sem experiência nesta área. Quatro estudantes universitários foram solicitados a identificar acordes maiores, menores e maiores com sétima. Diante dos sons, eles foram reforçados por escolherem a imagem correta. Essa imagem variava entre as cifras para violão dos acor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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11. Equivalência de estímulos em crianças portadoras da síndrome de apert / Stimulus equivalence in children with Apert Syndrome
The present study investigated the symbolic behaviors of patients with Apert Syndrome through the paradigm of stimulus equivalence, since it may provide a basis for understanding complex human behavior, such as symbolic behavior and language. It had been proposed three experiments which participants, aged between 16 and 21 years, were submitted to Experiment
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/05/2011
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12. Influência da atenção temporal em tarefas de discriminação visual e auditiva / Influence of temporal attention in auditory and visual discrimination tasks
A ocorrência repetida de um estímulo sensorial precedendo o estímulo alvo geralmente reduz o tempo de reação (TR). Este efeito tem sido atribuído à atenção temporal mobilizada pelo estímulo precedente que facilitaria a resposta no momento em que o estímulo alvo fosse esperado. Examinamos a atuação da estimulação precedente em tarefas de TR de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/04/2011