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Grant AM, Kousaie S, Coulter K, Gilbert AC, Baum SR, Gracco V, Titone D, Klein D, Phillips NA. Age of Acquisition Modulates Alpha Power During Bilingual Speech Comprehension in Noise. Front Psychol 2022; 13:865857. [PMID: 35548507 PMCID: PMC9083356 DOI: 10.3389/fpsyg.2022.865857] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/11/2022] [Indexed: 12/20/2022] Open
Abstract
Research on bilingualism has grown exponentially in recent years. However, the comprehension of speech in noise, given the ubiquity of both bilingualism and noisy environments, has seen only limited focus. Electroencephalogram (EEG) studies in monolinguals show an increase in alpha power when listening to speech in noise, which, in the theoretical context where alpha power indexes attentional control, is thought to reflect an increase in attentional demands. In the current study, English/French bilinguals with similar second language (L2) proficiency and who varied in terms of age of L2 acquisition (AoA) from 0 (simultaneous bilinguals) to 15 years completed a speech perception in noise task. Participants were required to identify the final word of high and low semantically constrained auditory sentences such as "Stir your coffee with a spoon" vs. "Bob could have known about the spoon" in both of their languages and in both noise (multi-talker babble) and quiet during electrophysiological recording. We examined the effects of language, AoA, semantic constraint, and listening condition on participants' induced alpha power during speech comprehension. Our results show an increase in alpha power when participants were listening in their L2, suggesting that listening in an L2 requires additional attentional control compared to the first language, particularly early in processing during word identification. Additionally, despite similar proficiency across participants, our results suggest that under difficult processing demands, AoA modulates the amount of attention required to process the second language.
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Affiliation(s)
- Angela M Grant
- Department of Psychology, Centre for Research in Human Development, Concordia University, Montreal, QC, Canada.,Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada
| | - Shanna Kousaie
- Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada.,School of Psychology, University of Ottawa, Ottawa, ON, Canada.,Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - Kristina Coulter
- Department of Psychology, Centre for Research in Human Development, Concordia University, Montreal, QC, Canada.,Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada
| | - Annie C Gilbert
- Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada.,School of Communication Sciences and Disorders, McGill University, Montreal, QC, Canada
| | - Shari R Baum
- Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada.,School of Communication Sciences and Disorders, McGill University, Montreal, QC, Canada
| | - Vincent Gracco
- School of Communication Sciences and Disorders, McGill University, Montreal, QC, Canada.,Haskins Laboratories, New Haven, CT, United States
| | - Debra Titone
- Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada.,Department of Psychology, McGill University Montreal, Montreal, QC, Canada
| | - Denise Klein
- Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada.,Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, Montreal, QC, Canada.,Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - Natalie A Phillips
- Department of Psychology, Centre for Research in Human Development, Concordia University, Montreal, QC, Canada.,Centre for Research on Brain, Language and Music, McGill University, Montreal, QC, Canada.,Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research and Jewish General Hospital, McGill University Memory Clinic, Jewish General Hospital, Montreal, QC, Canada
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2
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Quiles Pérez M, Martínez Beltrán ET, López Bernal S, Huertas Celdrán A, Martínez Pérez G. Breaching Subjects' Thoughts Privacy: A Study with Visual Stimuli and Brain-Computer Interfaces. JOURNAL OF HEALTHCARE ENGINEERING 2021; 2021:5517637. [PMID: 34413969 PMCID: PMC8370826 DOI: 10.1155/2021/5517637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/29/2021] [Accepted: 08/02/2021] [Indexed: 11/17/2022]
Abstract
Brain-computer interfaces (BCIs) started being used in clinical scenarios, reaching nowadays new fields such as entertainment or learning. Using BCIs, neuronal activity can be monitored for various purposes, with the study of the central nervous system response to certain stimuli being one of them, being the case of evoked potentials. However, due to the sensitivity of these data, the transmissions must be protected, with blockchain being an interesting approach to ensure the integrity of the data. This work focuses on the visual sense, and its relationship with the P300 evoked potential, where several open challenges related to the privacy of subjects' information and thoughts appear when using BCI. The first and most important challenge is whether it would be possible to extract sensitive information from evoked potentials. This aspect becomes even more challenging and dangerous if the stimuli are generated when the subject is not aware or conscious that they have occurred. There is an important gap in this regard in the literature, with only one work existing dealing with subliminal stimuli and BCI and having an unclear methodology and experiment setup. As a contribution of this paper, a series of experiments, five in total, have been created to study the impact of visual stimuli on the brain tangibly. These experiments have been applied to a heterogeneous group of ten subjects. The experiments show familiar visual stimuli and gradually reduce the sampling time of known images, from supraliminal to subliminal. The study showed that supraliminal visual stimuli produced P300 potentials about 50% of the time on average across all subjects. Reducing the sample time between images degraded the attack, while the impact of subliminal stimuli was not confirmed. Additionally, younger subjects generally presented a shorter response latency. This work corroborates that subjects' sensitive data can be extracted using visual stimuli and P300.
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Affiliation(s)
- Mario Quiles Pérez
- Departamento de Ingeniería de la Información y las Comunicaciones, University of Murcia, Murcia 30100, Spain
| | | | - Sergio López Bernal
- Departamento de Ingeniería de la Información y las Comunicaciones, University of Murcia, Murcia 30100, Spain
| | - Alberto Huertas Celdrán
- Communication Systems Group (CSG), Department of Informatics (IfI), University of Zürich UZH, CH-8050 Zürich, Switzerland
| | - Gregorio Martínez Pérez
- Departamento de Ingeniería de la Información y las Comunicaciones, University of Murcia, Murcia 30100, Spain
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Machine Learning: From Expert Systems to Deep Learning. Cogn Sci 2019. [DOI: 10.1017/9781108339216.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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The Prehistory of Cognitive Science. Cogn Sci 2019. [DOI: 10.1017/9781108339216.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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5
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Preface. Cogn Sci 2019. [DOI: 10.1017/9781108339216.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Bibliography. Cogn Sci 2019. [DOI: 10.1017/9781108339216.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Bayesianism in Cognitive Science. Cogn Sci 2019. [DOI: 10.1017/9781108339216.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Object Perception and Folk Physics. Cogn Sci 2019. [DOI: 10.1017/9781108339216.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Glossary. Cogn Sci 2019. [DOI: 10.1017/9781108339216.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Strategies for Brain Mapping. Cogn Sci 2019. [DOI: 10.1017/9781108339216.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Modules and Architectures. Cogn Sci 2019. [DOI: 10.1017/9781108339216.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Introduction. Cogn Sci 2019. [DOI: 10.1017/9781108339216.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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The Discipline Matures: Three Milestones. Cogn Sci 2019. [DOI: 10.1017/9781108339216.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Models of Language Learning. Cogn Sci 2019. [DOI: 10.1017/9781108339216.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Applying Dynamical Systems Theory to Model the Mind. Cogn Sci 2019. [DOI: 10.1017/9781108339216.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Exploring Mindreading. Cogn Sci 2019. [DOI: 10.1017/9781108339216.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Robotics: From GOFAI to Situated Cognition and Behavior-Based Robotics. Cogn Sci 2019. [DOI: 10.1017/9781108339216.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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The Cognitive Science of Consciousness. Cogn Sci 2019. [DOI: 10.1017/9781108339216.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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The Turn to the Brain. Cogn Sci 2019. [DOI: 10.1017/9781108339216.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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20
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Index for Cognitive Science (3rd edition). Cogn Sci 2019. [DOI: 10.1017/9781108339216.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Mindreading: Advanced Topics. Cogn Sci 2019. [DOI: 10.1017/9781108339216.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Physical Symbol Systems and the Language of Thought. Cogn Sci 2019. [DOI: 10.1017/9781108339216.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Looking Ahead: Challenges and Opportunities. Cogn Sci 2019. [DOI: 10.1017/9781108339216.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Neural Networks and Distributed Information Processing. Cogn Sci 2019. [DOI: 10.1017/9781108339216.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Lalwani P, Brang D. Stochastic resonance model of synaesthesia. Philos Trans R Soc Lond B Biol Sci 2019; 374:20190029. [PMID: 31630652 DOI: 10.1098/rstb.2019.0029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
In synaesthesia, stimulation of one sensory modality evokes additional experiences in another modality (e.g. sounds evoking colours). Along with these cross-sensory experiences, there are several cognitive and perceptual differences between synaesthetes and non-synaesthetes. For example, synaesthetes demonstrate enhanced imagery, increased cortical excitability and greater perceptual sensitivity in the concurrent modality. Previous models suggest that synaesthesia results from increased connectivity between corresponding sensory regions or disinhibited feedback from higher cortical areas. While these models explain how one sense can evoke qualitative experiences in another, they fail to predict the broader phenotype of differences observed in synaesthetes. Here, we propose a novel model of synaesthesia based on the principles of stochastic resonance. Specifically, we hypothesize that synaesthetes have greater neural noise in sensory regions, which allows pre-existing multisensory pathways to elicit supra-threshold activation (i.e. synaesthetic experiences). The strengths of this model are (a) it predicts the broader cognitive and perceptual differences in synaesthetes, (b) it provides a unified framework linking developmental and induced synaesthesias, and (c) it explains why synaesthetic associations are inconsistent at onset but stabilize over time. We review research consistent with this model and propose future studies to test its limits. This article is part of a discussion meeting issue 'Bridging senses: novel insights from synaesthesia'.
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Affiliation(s)
- Poortata Lalwani
- Department of Psychology, University of Michigan, 530 Church Street, Ann Arbor, MI 48109, USA
| | - David Brang
- Department of Psychology, University of Michigan, 530 Church Street, Ann Arbor, MI 48109, USA
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26
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Listening back in time: Does attention to memory facilitate word-in-noise identification? Atten Percept Psychophys 2019; 81:253-269. [PMID: 30187397 DOI: 10.3758/s13414-018-1586-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The ephemeral nature of spoken words creates a challenge for oral communications where incoming speech sounds must be processed in relation to representations of just-perceived sounds stored in short-term memory. This can be particularly taxing in noisy environments where perception of speech is often impaired or initially incorrect. Usage of prior contextual information (e.g., a semantically related word) has been shown to improve speech in noise identification. In three experiments, we demonstrate a comparable effect of a semantically related cue word placed after an energetically masked target word in improving accuracy of target-word identification. This effect persisted irrespective of cue modality (visual or auditory cue word) and, in the case of cues after the target, lasted even when the cue word was presented up to 4 seconds after the target. The results are framed in the context of an attention to memory model that seeks to explain the cognitive and neural mechanisms behind processing of items in auditory memory.
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27
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Dark VJ, Benson K. Semantic Priming and Identification of near Threshold Primes in a Lexical Decision Task. ACTA ACUST UNITED AC 2018. [DOI: 10.1080/14640749108400999] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Three experiments examined both the impact of semantic analysis of 50-msec, masked visual primes on a target response and the impact of semantic analysis of the target on a prime response. The first two experiments used a prime-target interval of 1000 msec. In Experiment 1, subjects reported the identity of each prime: (a) after a lexical decision about the target, (b) both before and after a lexical decision, or (c) after a target detection response. Prime report after both types of target response showed retroactive priming in which report was facilitated by related targets and inhibited by unrelated targets. Analyses of lexical decision latency and accuracy conditionalized on prime report showed that semantic priming was restricted to reported related primes. In Experiment 2, subjects made no overt response to the primes. Priming was conditionalized on recognition of the primes on a subsequent test. The pattern was the same as Experiment 1: There was priming only for recognized primes; recognition memory showed a pattern consistent with retroactive priming. Experiment 3 also conditionalized priming on recognition performance but used a prime-target interval of only 250 msec. Again, semantic priming was found only for recognized primes, and recognition memory revealed retroactive priming. Retroactive priming indicates an interdependency between prime and target processing that needs to be incorporated into models of semantic priming.
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Affiliation(s)
| | - Ken Benson
- Iowa State University, Ames, Iowa, U.S.A
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28
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Abstract
We argue that the lack of consensus regarding the existence of subliminal semantic processing arises from not taking into account the fact that linguistic stimuli are represented across several processing levels (features, letters, word form) that can independently reach or not reach awareness. Using masked words, we constructed conditions in which participants were aware of some letters or fragments of a word, while remaining unaware of the whole word. Three experiments using the Stroop priming paradigm show that when the stimulus set is reduced and participants are encouraged to guess the identity of the prime, such partially perceived stimuli can nonetheless give rise to “semantic” processing. We provide evidence that this effect is due to illusory reconstruction of the incompletely perceived stimulus, followed by usual semantic processing of the result. We conclude that previously reported unconscious Stroop priming is in fact a conscious effect, but applied to a perceptual illusion.
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Golestani N, Hervais-Adelman A, Obleser J, Scott SK. Semantic versus perceptual interactions in neural processing of speech-in-noise. Neuroimage 2013; 79:52-61. [DOI: 10.1016/j.neuroimage.2013.04.049] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 04/08/2013] [Accepted: 04/16/2013] [Indexed: 10/26/2022] Open
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30
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Abstract
Subliminal perception occurs when prime stimuli that participants claim not to be aware of nevertheless influence subsequent processing of a target. This claim, however, critically depends on correct methods to assess prime awareness. Typically, d′ (“d prime”) tasks administered after a priming task are used to establish that people are unable to discriminate between different primes. Here, we show that such d′ tasks are influenced by the nature of the target, by attentional factors, and by the delay between stimulus presentation and response. Our results suggest that the standard d′ task is not a straightforward measure of prime visibility. We discuss the implications of our findings for subliminal perception research.
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Affiliation(s)
- Astrid Vermeiren
- Consciousness, Cognition and Computation Group, Université Libre de Bruxelles, Brussels, Belgium.
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31
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Golestani N, Rosen S, Scott SK. Native-language benefit for understanding speech-in-noise: The contribution of semantics. BILINGUALISM (CAMBRIDGE, ENGLAND) 2009; 12:385-92. [PMID: 21151815 PMCID: PMC2999832 DOI: 10.1017/s1366728909990150] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Bilinguals are better able to perceive speech-in-noise in their native compared to their non-native language. This benefit is thought to be due to greater use of higher-level, linguistic context in the native language. Previous studies showing this have used sentences and do not allow us to determine which level of language contributes to this context benefit. Here, we used a new paradigm that isolates the SEMANTIC level of speech, in both languages of bilinguals. Results revealed that in the native language, a semantically related target word facilitates the perception of a previously presented degraded prime word relative to when a semantically unrelated target follows the prime, suggesting a specific contribution of semantics to the native language context benefit. We also found the reverse in the non-native language, where there was a disadvantage of semantic coext on word recognition, suggesting that such top-down, contextual information results in semantic interference in one's second language.
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Affiliation(s)
- Narly Golestani
- Institute of Cognitive Neuroscience University College London & University Medical School, Geneva
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32
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Kouider S, Dehaene S. Levels of processing during non-conscious perception: a critical review of visual masking. Philos Trans R Soc Lond B Biol Sci 2007; 362:857-75. [PMID: 17403642 PMCID: PMC2430002 DOI: 10.1098/rstb.2007.2093] [Citation(s) in RCA: 403] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Understanding the extent and limits of non-conscious processing is an important step on the road to a thorough understanding of the cognitive and cerebral correlates of conscious perception. In this article, we present a critical review of research on subliminal perception during masking and other related experimental conditions. Although initially controversial, the possibility that a broad variety of processes can be activated by a non-reportable stimulus is now well established. Behavioural findings of subliminal priming indicate that a masked word or digit can have an influence on perceptual, lexical and semantic levels, while neuroimaging directly visualizes the brain activation that it evokes in several cortical areas. This activation is often attenuated under subliminal presentation conditions compared to consciously reportable conditions, but there are sufficiently many exceptions, in paradigms such as the attentional blink, to indicate that high activation, per se, is not a sufficient condition for conscious access to occur. We conclude by arguing that for a stimulus to reach consciousness, two factors are jointly needed: (i) the input stimulus must have enough strength (which can be prevented by masking) and (ii) it must receive top-down attention (which can be prevented by drawing attention to another stimulus or task). This view leads to a distinction between two types of non-conscious processes, which we call subliminal and preconscious. According to us, maintaining this distinction is essential in order to make sense of the growing neuroimaging data on the neural correlates of consciousness.
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Affiliation(s)
- Sid Kouider
- Laboratoire des Sciences Cognitives et Psycholinguistique, EHESS/CNRS/ENS, 75230 Paris, France Cognitive Neuroimaging Unit, INSERM U562, SHFJ, CEA/DSV, 91401 Orsay, France.
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Snodgrass M, Bernat E, Shevrin H. Unconscious perception: A model-based approach to method and evidence. ACTA ACUST UNITED AC 2004; 66:846-67. [PMID: 15495909 DOI: 10.3758/bf03194978] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Unconscious perceptual effects remain controversial because it is hard to rule out alternative conscious perception explanations for them. We present a novel methodological framework, stressing the centrality of specifying the single-process conscious perception model (i.e., the null hypothesis). Various considerations, including those of SDT (Macmillan & Creelman, 1991), suggest that conscious perception functions hierarchically, in such a way that higher level effects (e.g., semantic priming) should not be possible without lower level discrimination (i.e., detection and identification). Relatedly, alternative conscious perception accounts (as well as the exhaustiveness, null sensitivity, and exclusiveness problems-Reingold & Merikle, 1988, 1990) predict positive relationships between direct and indirect measures. Contrariwise, our review suggests that negative and/or nonmonotonic relationships are found, providing strong evidence for unconscious perception and further suggesting that conscious and unconscious perceptual influences are functionally exclusive (cf. Jones, 1987), in such a way that the former typically override the latter when both are present. Consequently, unconscious perceptual effects manifest reliably only when conscious perception is completely absent, which occurs at the objective detection (but not identification) threshold.
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Affiliation(s)
- Michael Snodgrass
- Department of Psychiatry, University of Michigan Medical Center, Ann Arbor, Michigan 48105, USA.
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35
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Abstract
Viewers were presented with a rapid sequence of very brief stimulus pairs, each of which consisted of a pictured object followed by a related or unrelated word. The form of relatedness between the picture and word was manipulated across experiments (identical concept, associated concept, ink color of the picture). Recognition memory for the pictures was affected not only by whether or not paired items were conceptually identical or semantically related, but also by whether or not the words named an irrelevant feature, ink color. These results show that sequential items are integrated on the basis of similarity at whatever level is available, so that the stability of the memory representation of one or both items is increased. We propose that a common mechanism may underlie integration, priming, and selective attention.
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Affiliation(s)
- Kevin J O'Connor
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139, USA.
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Yamagata S, Yamaguchi S, Kobayashi S. Event-related evoked potential study of repetition priming to attended and unattended words. BRAIN RESEARCH. COGNITIVE BRAIN RESEARCH 2000; 10:167-71. [PMID: 10978704 DOI: 10.1016/s0926-6410(00)00019-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The filtering stage of ignored stimuli is one of main issues in the selective attention mechanism. We investigated whether unattended ignored stimuli show repetition priming effects on event-related brain potentials (ERPs), using a lexical decision task involving Japanese Kanji words. The repeated words in the unattended field generated a negative shift of the ERP over the frontal scalp sites. This suggested that unattended stimuli were processed implicitly to some degree and that different neural mechanisms contribute to repetition priming effects to attended and unattended stimuli.
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Affiliation(s)
- S Yamagata
- Department of Internal Medicine III, Shimane Medical University, 693, Izumo, Japan.
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37
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Abstract
Three experiments examined the effects of unconsciously presented picture primes on semantic categorization and naming responses to both word and picture targets. Picture naming and word categorization responses to targets were faster and more accurate when the picture primes belonged to the same semantic category as the targets, so called priming effect. No priming was found when subjects performed a word reading task. When priming was evident, no difference was found between responses to targets that were nominally identical to primes (e.g. the picture of a lion followed by either the word LION or the picture of a lion) compared with nominally different targets from the same semantic category as the primes (e.g. the picture of an ELEPHANT followed by either the word LION or the picture of a lion). Responding did not differ significantly from chance when subjects were asked to categorize the primes as natural objects vs. artifacts or as meaningful vs. meaningless objects in three distinct forced-choice unspeeded tasks.
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Affiliation(s)
- R Dell'Acqua
- CREPCO-CNRS, Université de Provence, Provence, France.
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38
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Schwarz W, Mecklinger A. Relationship between flanker identifiability and compatibility effect. PERCEPTION & PSYCHOPHYSICS 1995; 57:1045-52. [PMID: 8532494 DOI: 10.3758/bf03205463] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
What is the relation between the identifiability of masked flankers and their ability to induce compatibility effects in a letter classification task? Using a within-subjects design (n = 8), we first determined identification performance for two flankers (H or N) around an irrelevant target letter as a function of the time (stimulus onset asynchrony, or SOA) after which the flankers were masked. In a second condition, subjects classified the central letter of the same stimulus patterns irrespectively of the identity of the flankers. The compatibility effects increased with increasing identification performance as a function of SOA, and we found a significant compatibility effect even at an SOA at which the identifiability of the flankers did not differ significantly from zero. We discuss the statistical power of our design and an interpretation of our results in terms of a dissociation between perceptual processes and processes directly activating the motor system (direct parameter specification; cf. Neumann, 1990).
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Affiliation(s)
- W Schwarz
- Freie Universität Berlin, Psychologisches Institut, Germany
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Hines D. Effect of Masked Picture Primes on Semantic Priming for Easy- and Difficult-to-Name Words. The Journal of General Psychology 1993. [DOI: 10.1080/00221309.1993.9921190] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bernstein IH, Bissonnette V, Welch KR. Perceptual and response interactions in semantic priming. PERCEPTION & PSYCHOPHYSICS 1990; 48:525-34. [PMID: 2270184 DOI: 10.3758/bf03211598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In two experiments, subjects made pairs of lexical decisions verbally. In Experiment 1, masked stimuli appeared concurrently to the left and right of fixation; in Experiment 2, nonmasked stimuli appeared sequentially at fixation. The left-hand letter strings were judged more accurately in in Experiment 1, and the second letter strings were judged more accurately in Experiment 2. Each string in the pair could be either a word (e.g., fork) or a nonword anagram (e.g., frok). Consequently, the two strings in the pair could be related (e.g., fork-spoon, frok-spoon, etc.) or unrelated (e.g., fork-door, frok-door, etc.), independently of whether neither, either, or both strings were words. Semantically related stimuli induced consistent biases to respond "word," as noted in other studies. These biases were typically stronger for the event reported second. Minimal evidence was found for perceptual priming effects. The asymmetrical effects were consistent with spreading-activation-type mechanisms, but other considerations support a multiple-process view.
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Affiliation(s)
- I H Bernstein
- Department of Psychology, University of Texas, Arlington 76019-0528
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