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1.
Q J Exp Psychol (Hove) ; : 17470218241245107, 2024 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-38514252

RESUMO

Naming a picture (e.g., "duck") in the context of semantically related pictures (e.g., "eagle," "stork," "parrot") takes longer than naming it in the context of unrelated pictures (e.g., "knave," "toast," "atlas"). Adaptive models of word production attribute this semantic interference effect in blocked-cyclic naming (BCN) to an adaptive mechanism that makes competitor words, (e.g., the semantically related word "eagle" for the target word "duck") which are activated but not selected for production, less accessible for future retrieval. Results from a recent picture-word-interference study, however, suggested that alternative names (e.g., "bird" for "duck") might be exempt from this mechanism, challenging adaptive lexical processing as a general mechanism. We tested whether converging evidence is obtained in BCN. In Experiment 1, we embedded pictures responded to with alternative (category) names (e.g., "bird") into contexts composed of pictures responded to with specific (exemplar) names (e.g., "duck," "eagle," "stork," and "parrot"). If alternative names are exempt from adaptive lexical processing, interference in the homogeneous context should be found for specific name items but not for alternative name items. In contrast to this prediction, there was similar-sized interference for both types of items. In Experiment 2, we replaced the alternative name items with unrelated items. For these items, interference was largely diminished, ruling out that the effect found in Experiment 1 is a general set effect. Overall, our data suggest that alternative names are not special with respect to adaptive lexical processing.

2.
J Exp Psychol Learn Mem Cogn ; 50(4): 595-621, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37227878

RESUMO

This study traced different types of distractor effects in the picture-word interference (PWI) task across repeated naming. Starting point was a PWI study by Kurtz et al. (2018). It reported that naming a picture (e.g., of a duck) was slowed down by a distractor word phonologically related to an alternative picture name from a different taxonomic level ("birch" related to "bird") when compared to an unrelated control, indicating that the alternative name was (phonologically) coactivated. Importantly, the effect was stable across repeated naming. The authors argued that this stability challenges adaptive models of word production according to which coactivated but nonselected words become less accessible for future retrieval; such a change in lexical accessibility should have been reflected in reduced interference. Using a similar experimental protocol as Kurtz et al., our study looked at the stability of different distractor effects in PWI. Interference from a distractor word phonologically related to an alternative name was stable across repeated naming, replicating Kurtz et al. In contrast, interference from a distractor word denoting a semantic category coordinate ("stork") was reduced across repeated naming. A similar pattern was found for a distractor word corresponding to an alternative name ("bird"). Facilitation from a distractor word phonologically related to the target name ("dust"), in contrast, was stable across repeated naming. We discuss the implications of these findings with respect to the issue of changes in the accessibility of lexical representations, the use of the PWI task in this context, and the use of this task in general. (PsycInfo Database Record (c) 2024 APA, all rights reserved).


Assuntos
Nomes , Reconhecimento Visual de Modelos , Humanos , Semântica
3.
J Cogn Neurosci ; 34(8): 1397-1415, 2022 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-35551402

RESUMO

When speakers name a picture (e.g., "duck"), a distractor word phonologically related to an alternative name (e.g., "birch" related to "bird") slows down naming responses compared with an unrelated distractor word. This interference effect obtained with the picture-word interference task is assumed to reflect the phonological coactivation of close semantic competitors and is critical for evaluating contemporary models of word production. In this study, we determined the ERP signature of this effect in immediate and delayed versions of the picture-word interference task. ERPs revealed a differential processing of related and unrelated distractors: an early (305-436 msec) and a late (537-713 msec) negativity for related as compared with unrelated distractors. In the behavioral data, the interference effect was only found in immediate naming, whereas its ERP signature was also present in delayed naming. The time window of the earlier ERP effect suggests that the behavioral interference effect indeed emerges at a phonological processing level, whereas the functional significance of the later ERP effect is as yet not clear. The finding of a robust ERP correlate of phonological coactivation might facilitate future research on lexical processing in word production.


Assuntos
Betula , Patos , Animais , Potenciais Evocados , Audição , Humanos , Tempo de Reação , Semântica , Fala/fisiologia
4.
Neuroimage ; 246: 118767, 2022 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-34856377

RESUMO

The breakdown of rapid and accurate retrieval of words is a hallmark of aphasic speech and a prime target of therapeutic intervention. Complementary, psycho- and neurolinguistic research have developed a spectrum of models, how and by which neuronal network uncompromised speakers can rely on remarkable lexical retrieval capacities. Motivated by both lines of research we invited 32 participants with a chronic left hemispheric brain lesion to name pictures in the presence of distractor words. This picture-word-interference (PWI) paradigm is widely used in psycho- and neurolinguistic research. We find that also after brain lesion categorically related words (CAT â†’ [dog]picture) impede naming, while associatively related words (BONE â†’ [dog]picture) ease access, when compared to unrelated distractor words. The effects largely affecting latencies in neurotypical populations, are reproduced for error rate in our participants with lesions in the language network. Unsurprisingly, overall naming abilities varied greatly across patients. Notably, however, the two effects (categorical interference / associative facilitation) differ between participants. Correlating performance with lesion patterns we find support for the notion of a divergence of brain areas affording different aspects of the task: (i) lesions in the left middle temporal gyurs (MTG) deteriorate overall naming, confirming previous work; more notably, (ii) lesions comprising the inferior frontal hub (inferior frontal gyrus, IFG) of the language-network increase the interference effect for the categorical condition; on the contrary, (iii) lesions to the mid-to-posterior temporal hub (posterior middle and superior temporal gyri, pMTG/ pSTG) increase the facilitatory effect for the associative condition on error rates. The findings can be accommodated in a neuro-linguistic framework, which localizes lexical activation but also lexical interference in posterior parts of the language network (pMTG/pITG); conversely, selection between co-activated categorically related entries is afforded by frontal language areas (IFG). While purely experimental in nature our study highlights that lesion site differentially influences specific aspects of word retrieval. Since confrontational naming is a cornerstone of aphasia rehabilitation, this may be of note when designing and evaluating novel therapeutic regimes.


Assuntos
Afasia , Córtex Cerebral , Disfunção Cognitiva , Rede Nervosa , Reconhecimento Visual de Modelos/fisiologia , Psicolinguística , Adulto , Idoso , Afasia/diagnóstico por imagem , Afasia/patologia , Afasia/fisiopatologia , Associação , Córtex Cerebral/diagnóstico por imagem , Córtex Cerebral/patologia , Córtex Cerebral/fisiopatologia , Disfunção Cognitiva/diagnóstico por imagem , Disfunção Cognitiva/patologia , Disfunção Cognitiva/fisiopatologia , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Rede Nervosa/diagnóstico por imagem , Rede Nervosa/patologia , Rede Nervosa/fisiopatologia , Semântica
5.
J Exp Psychol Hum Percept Perform ; 47(5): 716-730, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34264729

RESUMO

Semantic context effects obtained in naming tasks have been most influential in devising and evaluating models of word production. We reinvestigated this effect in the frequently used blocked-cyclic naming task in which stimuli are presented repeatedly either sorted by semantic category (homogeneous context) or intermixed (heterogeneous context). Previous blocked-cyclic naming studies have shown slower picture naming responses in the homogeneous context. Our study compared this context effect in two task versions, picture naming and sound naming. Target words were identical across task versions (e.g., participants responded with the word dog to either the picture of that animal or to the sound [barking] produced by it). We found semantic interference in the homogeneous context also with sounds and the effect was substantially larger than with pictures (Experiments 1 and 2). This difference is unlikely to result from extended perceptual processing of sounds as compared with pictures (Experiments 3 and 4) or from stronger links between pictures and object names than between sounds and object names (Experiment 5). Overall, our results show that semantic context effects in blocked-cyclic naming generalize to stimulus types other than pictures and-in part-also reflect prelexical processes that depend on the nature of the stimuli used for eliciting the naming responses. This highlights the need to consider the impact of initial processing steps in naming studies when devising and evaluating theories of word production. (PsycInfo Database Record (c) 2021 APA, all rights reserved).


Assuntos
Nomes , Semântica , Atenção , Humanos , Reconhecimento Visual de Modelos
6.
Q J Exp Psychol (Hove) ; 73(12): 2290-2308, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32640868

RESUMO

In three experiments, participants named environmental sounds (e.g., the bleating of a sheep by producing the word "sheep") in the presence of distractor pictures. In Experiment 1, we observed faster responses in sound naming with congruent pictures (e.g., sheep; congruency facilitation) and slower responses with semantically related pictures (e.g., donkey; semantic interference), each compared with unrelated pictures (e.g., violin). In Experiments 2 and 3, we replicated these effects and used a psychological refractory period approach (combining an arrow decision or letter rotation task as Task 1 with sound naming as Task 2) to investigate the locus of the effects. Congruency facilitation was underadditive with dual-task interference suggesting that it arises, in part, during pre-central processing stages in sound naming (i.e., sound identification). In contrast, semantic interference was additive with dual-task interference suggesting that it arises during central (or post-central) processing stages in sound naming (i.e., response selection or later processes). These results demonstrate the feasibility of sound naming tasks for chronometric investigations of word production. Furthermore, they highlight that semantic interference is not restricted to the use of target pictures and distractor words but can be observed with quite different target-distractor configurations. The experiments support the view that congruency facilitation and semantic interference reflect some general cognitive mechanism involved in word production. These results are discussed in the context of the debate about semantic-lexical selection mechanisms in word production.


Assuntos
Nomes , Semântica , Animais , Atenção , Humanos , Reconhecimento Visual de Modelos , Ovinos
7.
J Abnorm Psychol ; 129(5): 480-491, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32437207

RESUMO

Biased social cognition toward an enhanced processing of negative social information might contribute to instability in interpersonal relationships. Such interpersonal dysfunctions are important for the understanding of several mental disorders, among them borderline personality disorder (BPD). To experimentally test enhanced memory retrieval of negative social information, using a newly developed variant of a looking-at-nothing paradigm, 45 BPD patients and 36 healthy women learned positive and negative personality traits of different target persons. In a translational memory test, participants were asked to use the learned information to evaluate statements about the target person. In addition to behavioral measures of memory performance, we investigated eye gaze patterns to decompose memory retrieval processes. We hypothesized that BPD patients would retrieve negative as compared to positive person information more accurately than healthy controls, and show increased eye gaze toward spatial locations where negative information was provided during the learning phase. Results pointed to a more accurate retrieval of negative person attributes in the patient group as compared with healthy controls, thereby corroborating a negativity bias in social cognition in an exemplary sample of patients with interpersonal problems. Interestingly, the observed negativity bias for person memory was associated with BPD severity, stronger expectancies to be rejected by others, and social detachment. No group differences regarding eye fixation behavior were found. We propose that enhanced retrieval of negative person information might be associated with dysfunctional cognitive schemas as well as reduced behavioral trust, and be of relevance for mental disorders characterized by interpersonal difficulties. (PsycInfo Database Record (c) 2020 APA, all rights reserved).


Assuntos
Transtorno da Personalidade Borderline/psicologia , Emoções/fisiologia , Relações Interpessoais , Memória/fisiologia , Percepção Social , Confiança , Adulto , Feminino , Humanos , Comportamento Social , Adulto Jovem
8.
J Exp Psychol Hum Percept Perform ; 44(10): 1586-1602, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29975094

RESUMO

Picture naming studies have shown that alternative picture names become phonologically coactivated even when they are eventually not produced (e.g., dog when poodle is produced and vice versa). The authors investigated whether this pattern is shaped by recent experience. Specifically, they tested whether the phonological coactivation of an alternative name is attenuated, when speakers consistently only use one particular name in a large number of naming episodes. In 3 picture-word interference experiments, the authors measured the phonological coactivation of basic-level alternative names during subordinate-level naming (Experiments 1 and 3) and of subordinate-level alternative names during basic-level naming (Experiment 2). They measured the coactivation of the alternative name at different points in time with distractor words that were phonologically related or unrelated to that name. If the pattern of lexical activation is shaped by previous naming episodes and the phonological coactivation of the nonproduced alternative name decreases, interference from related distractors should be reduced in the course of the experiment. Contrary to this prediction, the interference effect from distractors phonologically related to the alternative name remained stable. This was also true when participants were not familiarized with the pictures, more naming episodes were implemented, and a consolidation phase was introduced (Experiment 3). Overall, these results indicate some limitation of incremental learning in word production. (PsycINFO Database Record (c) 2018 APA, all rights reserved).


Assuntos
Aprendizagem/fisiologia , Reconhecimento Visual de Modelos/fisiologia , Psicolinguística , Fala/fisiologia , Adulto , Feminino , Humanos , Masculino , Adulto Jovem
9.
Psychon Bull Rev ; 25(6): 2301-2308, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29790121

RESUMO

Picture naming takes longer in the presence of socially inappropriate (taboo) distractor words compared with neutral distractor words. Previous studies have attributed this taboo interference effect to increased attentional capture by taboo words or verbal self-monitoring-that is, control processes scrutinizing verbal responses before articulation. In this study, we investigated the cause and locus of the taboo interference effect by contrasting three tasks that used the same target pictures, but systematically differed with respect to the processing stages involved: picture naming (requiring conceptual processing, lexical processing, and articulation), phoneme decision (requiring conceptual and lexical processing), and natural size decision (requiring conceptual processing only). We observed taboo interference in picture naming and phoneme decision. In size decision, taboo interference was not reliably observed under the same task conditions in which the effect arose in picture naming and phoneme decision, but it emerged when the difficulty of the size decision task was increased by visually degrading the target pictures. Overall, these results suggest that taboo interference cannot be exclusively attributed to verbal self-monitoring operating over articulatory responses. Instead, taboo interference appears to arise already prior to articulatory preparation, during lexical processing and-at least with sufficiently high task difficulty-during prelexical processing stages.


Assuntos
Atenção , Reconhecimento Visual de Modelos , Desempenho Psicomotor , Tempo de Reação , Leitura , Semântica , Tabu , Adolescente , Adulto , Tomada de Decisões , Feminino , Humanos , Masculino , Fonética , Adulto Jovem
10.
Q J Exp Psychol (Hove) ; 71(5): 1134-1149, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-28335686

RESUMO

We examined how noun-noun compounds and their syntactic properties are lexically stored and processed in speech production. Using gender-marked determiner primes ( dermasc, diefem, dasneut [the]) in a picture naming task, we tested for specific effects from determiners congruent with either the modifier or the head of the compound target (e.g., Teemasckannefem [teapot]) to examine whether the constituents are processed independently at the syntactic level. Experiment 1 assessed effects of auditory gender-marked determiner primes in bare noun picture naming, and Experiment 2 assessed effects of visual gender-marked determiner primes in determiner-noun picture naming. Three prime conditions were implemented: (a) head-congruent determiner (e.g., diefem), (b) modifier-congruent determiner (e.g., dermasc), and (c) incongruent determiner (e.g., dasneuter). We observed a facilitation effect of head congruency but no effect of modifier congruency. In Experiment 3, participants produced novel noun-noun compounds in response to two pictures, demanding independent processing of head and modifier at the syntactic level. Now, head and modifier congruency effects were obtained, demonstrating the general sensitivity of our task. Our data support the notion of a single-lemma representation of lexically stored compound nouns in the German production lexicon.


Assuntos
Associação , Compreensão/fisiologia , Idioma , Semântica , Adulto , Feminino , Humanos , Masculino , Nomes , Estimulação Luminosa , Psicolinguística , Tempo de Reação/fisiologia , Fatores Sexuais , Vocabulário , Adulto Jovem
11.
Psychon Bull Rev ; 25(5): 1909-1916, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29030759

RESUMO

In this study we explored the locus of semantic interference in a novel picture-sound interference task in which participants name pictures while ignoring environmental distractor sounds. In a previous study using this task (Mädebach, Wöhner, Kieseler, & Jescheniak, in Journal of Experimental Psychology: Human Perception and Performance, 43, 1629-1646, 2017), we showed that semantically related distractor sounds (e.g., BARKINGdog) interfere with a picture-naming response (e.g., "horse") more strongly than unrelated distractor sounds do (e.g., DRUMMINGdrum). In the experiment reported here, we employed the psychological refractory period (PRP) approach to explore the locus of this effect. We combined a geometric form classification task (square vs. circle; Task 1) with the picture-sound interference task (Task 2). The stimulus onset asynchrony (SOA) between the tasks was systematically varied (0 vs. 500 ms). There were three central findings. First, the semantic interference effect from distractor sounds was replicated. Second, picture naming (in Task 2) was slower with the short than with the long task SOA. Third, both effects were additive-that is, the semantic interference effects were of similar magnitude at both task SOAs. This suggests that the interference arises during response selection or later stages, not during early perceptual processing. This finding corroborates the theory that semantic interference from distractor sounds reflects a competitive selection mechanism in word production.


Assuntos
Atenção/fisiologia , Percepção Auditiva/fisiologia , Função Executiva/fisiologia , Reconhecimento Visual de Modelos/fisiologia , Semântica , Adolescente , Adulto , Feminino , Humanos , Masculino , Adulto Jovem
12.
Hist Psychol ; 20(3): 342-345, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28782973

RESUMO

Wilhelm M. Wundt (1832-1920) was one of the most important German scholars of the 19th and early 20th centuries and famously founded the first institute for experimental psychology in Leipzig in 1879. Wundt's institute established a teaching and research facility that attracted a large number of students from all over the world and contributed greatly to the development of modern psychology. Until now, the relatively poor indexing and documentation as well as the difficulty in accessing the Wundt estate has prevented a widespread and comprehensive investigation and consideration of these documents. The digitization project described in this article has rectified these problems and will hopefully provide a valuable source for students and researchers interested in Wundt's work. (PsycINFO Database Record

13.
J Exp Psychol Hum Percept Perform ; 43(9): 1629-1646, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28414498

RESUMO

The study presented here investigated how environmental sounds influence picture naming. In a series of four experiments participants named pictures (e.g., the picture of a horse) while hearing task-irrelevant sounds (e.g., neighing, barking, or drumming). Experiments 1 and 2 established two findings, facilitation from congruent sounds (e.g., picture: horse, sound: neighing) and interference from semantically related sounds (e.g., sound: barking), both relative to unrelated sounds (e.g., sound: drumming). Experiment 3 replicated the effects in a situation in which participants were not familiarized with the sounds prior to the experiment. Experiment 4 replicated the congruency facilitation effect, but showed that semantic interference was not obtained with distractor sounds which were not associated with target pictures (i.e., were not part of the response set). The general pattern of facilitation from congruent sound distractors and interference from semantically related sound distractors resembles the pattern commonly observed with distractor words. This parallelism suggests that the underlying processes are not specific to either distractor words or distractor sounds but instead reflect general aspects of semantic-lexical selection in language production. The results indicate that language production theories need to include a competitive selection mechanism at either the lexical processing stage, or the prelexical processing stage, or both. (PsycINFO Database Record


Assuntos
Atenção/fisiologia , Percepção Auditiva/fisiologia , Reconhecimento Visual de Modelos/fisiologia , Psicolinguística , Semântica , Adolescente , Adulto , Feminino , Humanos , Masculino , Adulto Jovem
14.
J Exp Psychol Hum Percept Perform ; 43(6): 1194-1206, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28383960

RESUMO

There is compelling evidence that context strongly influences our choice of words (e.g., whether we refer to a particular animal with the basic-level name "bird" or the subordinate-level name "duck"). However, little is known about whether the context already affects the degree to which the alternative words are activated. In this study, we explored the effect of a preceding linguistic context on the phonological activation of alternative picture names. In Experiments 1 to 3, the context was established by a request produced by an imaginary interlocutor. These requests either constrained the naming response to the subordinate level on pragmatic grounds (e.g., "name the bird!") or not (e.g., "name the object!"). In Experiment 4, the context was established by the speaker's own previous naming response. Participants named the pictures with their subordinate-level names and the phonological activation of the basic-level names was assessed with distractor words phonologically related versus unrelated to that name (e.g., "birch" vs. "lamp"). In all experiments, we consistently found that distractor words phonologically related to the basic-level name interfered with the naming response more strongly than unrelated distractor words. Moreover, this effect was of comparable size for nonconstraining and constraining contexts indicating that the alternative name was phonologically activated and competed for selection, even when it was not an appropriate lexical option. Our results suggest that the speech production system is limited in its ability of flexibly adjusting and fine-tuning the lexical activation patterns of words (among which to choose from) as a function of pragmatic constraints. (PsycINFO Database Record


Assuntos
Psicolinguística , Comportamento Verbal/fisiologia , Adulto , Feminino , Humanos , Masculino , Fala/fisiologia , Adulto Jovem
15.
Q J Exp Psychol (Hove) ; 70(4): 811-831, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26985697

RESUMO

This study investigated to what extent advance planning during sentence production is affected by a concurrent cognitive load. In two picture-word interference experiments in which participants produced subject-verb-object sentences while ignoring auditory distractor words, we assessed advance planning at a phonological (lexeme) and at an abstract-lexical (lemma) level under visuospatial or verbal working memory (WM) load. At the phonological level, subject and object nouns were found to be activated before speech onset with concurrent visuospatial WM load, but only subject nouns were found to be activated with concurrent verbal WM load, indicating a reduced planning scope as a function of type of WM load (Experiment 1). By contrast, at the abstract-lexical level, subject and object nouns were found to be activated regardless of type of concurrent load (Experiment 2). In both experiments, sentence planning had a more detrimental effect on concurrent verbal WM task performance than on concurrent visuospatial WM task performance. Overall, our results suggest that advance planning at the phonological level is more affected by a concurrently performed verbal WM task than advance planning at the abstract-lexical level. Also, they indicate an overlap of resources allocated to phonological planning in speech production and verbal WM.


Assuntos
Atenção/fisiologia , Idioma , Memória de Curto Prazo/fisiologia , Percepção Espacial/fisiologia , Aprendizagem Verbal/fisiologia , Adolescente , Adulto , Aprendizagem por Associação/fisiologia , Formação de Conceito/fisiologia , Feminino , Humanos , Masculino , Adulto Jovem
16.
Exp Psychol ; 63(6): 307-317, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28059032

RESUMO

Prominent speech production models view lexical access as a competitive process. According to these models, a semantically related distractor picture should interfere with target picture naming more strongly than an unrelated one. However, several studies failed to obtain such an effect. Here, we demonstrate that semantic interference is obtained, when the distractor picture is sufficiently processed. Participants named one of two pictures presented in close temporal succession, with color cueing the target. Experiment 1 induced the prediction that the target appears first. When this prediction was violated (distractor first), semantic interference was observed. Experiment 2 ruled out that the time available for distractor processing was the driving force. These results show that semantically related distractor pictures interfere with the naming response when they are sufficiently processed. The data thus provide further support for models viewing lexical access as a competitive process.


Assuntos
Atenção/fisiologia , Sinais (Psicologia) , Reconhecimento Visual de Modelos/fisiologia , Semântica , Fala/fisiologia , Humanos , Tempo de Reação/fisiologia
17.
Psychon Bull Rev ; 21(5): 1294-300, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24687732

RESUMO

Picture-naming studies have demonstrated interference from semantic-categorically related distractor words, but not from corresponding distractor pictures, and the lack of generality of the interference effect has been argued to challenge theories viewing lexical selection in speech production as a competitive process. Here, we demonstrate that semantic interference from context pictures does become visible, if sufficient attention is allocated to them. We combined picture naming with a spatial-cuing procedure. When participants' attention was shifted to the distractor, semantically related distractor pictures interfered with the response, as compared with unrelated distractor pictures. This finding supports models conceiving lexical retrieval as competitive (Levelt, Roelofs, & Meyer, 1999) but is difficult to reconcile with the response exclusion hypothesis (Finkbeiner & Caramazza, 2006b) proposed as an alternative.


Assuntos
Atenção , Semântica , Fala , Comportamento de Escolha , Humanos , Estimulação Luminosa , Tempo de Reação
18.
J Cogn Neurosci ; 26(7): 1403-17, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24405107

RESUMO

The aim of the current study was to shed further light on control processes that shape semantic access and selection during speech production. These processes have been linked to differential cortical activation in the left inferior frontal gyrus (IFG) and the left middle temporal gyrus (MTG); however, the particular function of these regions is not yet completely elucidated. We applied transcranial direct current stimulation to the left IFG and the left MTG (or sham stimulation) while participants named pictures in the presence of associatively related, categorically related, or unrelated distractor words. This direct modulation of target regions can help to better delineate the functional role of these regions in lexico-semantic selection. Independent of stimulation, the data show interference (i.e., longer naming latencies) with categorically related distractors and facilitation (i.e., shorter naming latencies) with associatively related distractors. Importantly, stimulation location interacted with the associative effect. Whereas the semantic interference effect did not differ between IFG, MTG, and sham stimulations, the associative facilitation effect was diminished under MTG stimulation. Analyses of latency distributions suggest this pattern to result from a response reversal. Associative facilitation occurred for faster responses, whereas associative interference resulted in slower responses under MTG stimulation. This reduction of the associative facilitation effect under transcranial direct current stimulation may be caused by an unspecific overactivation in the lexicon or by promoting competition among associatively related representations. Taken together, the results suggest that the MTG is especially involved in the processes underlying associative facilitation and that semantic interference and associative facilitation are linked to differential activation in the brain.


Assuntos
Mapeamento Encefálico , Encéfalo/fisiologia , Reconhecimento Visual de Modelos/fisiologia , Semântica , Vocabulário , Adulto , Análise de Variância , Atenção/fisiologia , Sinais (Psicologia) , Feminino , Humanos , Masculino , Nomes , Estimulação Luminosa , Tempo de Reação/fisiologia , Estimulação Transcraniana por Corrente Contínua , Adulto Jovem
19.
Mem Cognit ; 40(5): 760-8, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22371163

RESUMO

The picture-word interference paradigm is a prominent tool for studying lexical retrieval during speech production. When participants name the pictures, interference from semantically related distractor words has regularly been shown. By contrast, when participants categorize the pictures, facilitation from semantically related distractors has typically been found. In the extant studies, however, differences in the task instructions (naming vs. categorizing) were confounded with the response level: While responses in naming were typically located at the basic level (e.g., "dog"), responses were located at the superordinate level in categorization (e.g., "animal"). The present study avoided this confound by having participants respond at the basic level in both naming and categorization, using the same pictures, distractors, and verbal responses. Our findings confirm the polarity reversal of the semantic effects--that is, semantic interference in naming, and semantic facilitation in categorization. These findings show that the polarity reversal of the semantic effect is indeed due to the different tasks and is not an artifact of the different response levels used in previous studies. Implications for current models of language production are discussed.


Assuntos
Aprendizagem por Associação , Atenção , Rememoração Mental , Reconhecimento Visual de Modelos , Semântica , Comportamento Verbal , Aprendizagem Verbal , Tomada de Decisões , Humanos , Reconhecimento Psicológico
20.
J Exp Psychol Learn Mem Cogn ; 37(2): 522-38, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21299323

RESUMO

The semantic interference effect in the picture-word interference task is interpreted as an index of lexical competition in prominent speech production models. Janssen, Schirm, Mahon, and Caramazza (2008) challenged this interpretation on the basis of experiments with a novel version of this task, which introduced a task-switching component. Participants either named the picture or read the word, depending on the word's color. Janssen et al. reported semantic interference in picture naming, regardless of whether the word appeared simultaneously with the picture (immediate naming) or 1,000 ms after the picture (delayed naming). Because picture name retrieval is completed in less than 1,000 ms, the finding in delayed naming was taken as evidence against the lexical competition account. In 3 sets of experiments conducted in German and English, we tested for semantic effects in Janssen et al.'s task-switching version and in the standard picture-word interference task. Using identical materials, we obtained sizeable interference effects in the standard task (Experiments 2, 4, and 6) but no effects in the task-switching version (Experiments 1, 3, and 5). When the word reading trials of the task-switching version were replaced with no-go trials (Experiment 7), semantic interference reemerged in immediate naming but was still absent in delayed naming. The experiments question the reliability of Janssen et al.'s critical finding and suggest that theoretical inferences about the origin of semantic effects in the standard picture-word interference task based on results from the task-switching version used by Janssen et al. are difficult to draw.


Assuntos
Atenção/fisiologia , Conflito Psicológico , Reconhecimento Visual de Modelos , Tempo de Reação/fisiologia , Semântica , Adolescente , Adulto , Análise de Variância , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Nomes , Testes Neuropsicológicos , Estimulação Luminosa , Leitura , Vocabulário , Adulto Jovem
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