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Perceivers’
brains track complex sound structures, keep signals in memory, learn
regularities between sounds, build up knowledge and use these
information to expect and anticipate future events.These expectations
shape the perception of upcoming signals: processing of an expected
event is faster and more accurate, less stimulation necessary and less
neural resources engaged. |
| Expectations can be based on perceptual,
sensory information (sounds stored in auditory memory) and/or cognitive
influences, such as attention or listeners’ knowledge about
systems underlying auditory signals (e.g., linguistic or musical
systems). We investigate perceptual and
cognitive expectations with complementary approaches (psycho-acoustics,
psychology, neurosciences) and methodologies (e.g., behavior, EEG,
SEEG, MEG, PET,
fMRI); we also develop links with clinical research (e.g., coma
patients; patients with hearing disorders or linguistic and musical
deficits). |
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Membres
:
- Barbara Tillmann,
DR2 CNRS
- Fabien Perrin ,
MCU UCBL
- Nicolas Grimault,
CR1 CNRS
- Alexandra Corneyllie, Ingénieure
- Charles Delbé, Post-doctorant
- Philippe Albouy, Doctorant (co-dir. A. Caclin)
- Marion David, Doctorante (co-dir. M Lavandier, ENTPE)
- Tatiana Selchenkova, Doctorante
- Ben Schultz, Doctorant (co-tutelle K. Stevens,
University of Western Sydney)
- Carlos Henrique Silveira, Doctorant (co-dir.
M. Barnier, Université Lyon 2, LESLA)
- Floris Van Vugt, Doctorant (co-dir. E.
Altenmüller, IMMM, Hannover)
- Clotilde Cadart, Master student
- Mélodie Faguet, Master student
- Maïté Castro, Master student
- Fanny L'Heritier, Master student
- Florence Léger, Administrative
- Romain Saroli, Administratif
- Manuela Allegro, Administrative
- Marc Thévenet, Ingénieur de Recherche
- Vincent Farget, Ingénieur d'Etude
- Belkacem Messaoudi, Ingénieur d'Etude
- Samuel Garcia, Ingénieur d'Etude
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Contacts :
- tel: +33 04.37.28.76.00.
- fax:
+33 04.37.28.76.01.
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1 - Effects of listeners' knowledge (linguistic, musical, artificial) on perception
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2 - Implicit and unconscious processing
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3 - Temporal expectations and cross-modal interractions
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4 - Cross-domain interactions and clinical applications
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Click on the images
Theme 1 - Effects of listeners'knowledge (linguistic, musical, artificial) on perception
Cognitive expectations can be based on listeners’ knowledge about linguistic
and musical structures as well as newly acquired artificial structures (in the
lab). Listeners’ top-down expectations influence early perceptual processing
steps, such as word detection, auditory scene analysis and pitch processing.
For example, tonal expectations can influence pitch perception at perceptual
processing steps and not only at task-related, decisional processing (Marmel et
al., 2008, 2010). Moreover, linguistic knowledge facilitates the detection of
speech stimuli over non-speech stimuli (Signoret et al., 2011). The use of
artificial sound structures allows the investigation of short-term acquisition
of new knowledge and the development of cognitive expectancies for both pitch
and time dimensions with verbal and non-verbal materials.
Theme 2 - Implicit and unconscious processing
Auditory
expectations can operate not only at a conscious, explicit level, but also at a
non-conscious, implicit level. The power of implicit cognition can be shown
with the behavioral priming paradigm (e.g., Tillmann et al., 2007).
Sub-threshold presentations of verbal material allow us to systematically
investigate which levels of processing (e.g., phonological or semantic) can be
reached for sounds that remain on an unconscious level (e.g., Signoret et al.,
2011; Daltrozzo et al., 2011). With this research approach, we have confirmed
the importance of neural oscillations to allow for conscious perception
(Signoret et al., in preparation), and we will further investigate the crucial
role of neural synchronizations for conscious representation of mental
processes (perception and imagery), also with recordings of depth electrodes
(in epileptic patients) to test long-distant coupling.
Theme 3 - Temporal expectations and cross-modal interractions
Perceptual
expectations can be guided by temporal structures and acoustic regularities.
The emerging temporal expectations are related to attentional processes (Jones,
1976), We investigate temporal expectations for perception (e.g.,
Tillmann & Lebrun, 2006) and auditory scene analyses (Devergie et al.,
2010), as well as for the learning of new structured systems. Perceptual
expectations that influence auditory scene analyses that can be further
supported by visual information (Devergie et al 2011). We also
investigate the role and articulation of various perceptual and cognitive
expectations in the organization of perceptual streams, notably when perceptual
cues (e.g. in the auditory domain: temporal fine structure, envelope cues,
spectral cues; e.g. in the visual domain; contrast, movement) and/or cognitive
cues provide conflicting information.
Theme 4 - Cross-domain interactions and clinical applications
Research
in themes 1 to 3 provides the basis for research in theme 4 leading to clinical
applications. First, we are interested in evaluating cognitive functions of
patient populations (linguistic and musical processing), which allows us to
further understand normal brain mechanisms and contributes to the development
of diagnostic and predictive measures (e.g., Perrin et al., 2006; Schnakers et
al., 2008). Second, the observation of neural resources shared between
linguistic and musical structure processing (e.g., Tillmann et al., 2006),
leads us to investigate music as a tool for stimulating cognitive processes
(for example to improve cognitive sequencing; Przybylski et al., in prep.).
Part of this research integrates in the European grant project EBRAMUS.
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