Merging auditory and visual phonetic information: A critical test for feedback?

2000 ◽  
Vol 23 (3) ◽  
pp. 327-328 ◽  
Author(s):  
Lawrence Brancazio ◽  
Carol A. Fowler
Keyword(s):  
Speech Perception ◽  
Visual Information ◽  
Audiovisual Speech ◽  
Critical Test ◽  
Audiovisual Speech Perception ◽  
Phonetic Information ◽  
Present Description

The present description of the Merge model addresses only auditory, not audiovisual, speech perception. However, recent findings in the audiovisual domain are relevant to the model. We outline a test that we are conducting of the adequacy of Merge, modified to accept visual information about articulation.

Audiovisual Speech Perception

Perception ◽  
1997 ◽  
Vol 26 (1_suppl) ◽  
pp. 347-347
Author(s):  
M Sams
Keyword(s):  
Speech Perception ◽  
Visual Information ◽  
Word Meaning ◽  
Source Area ◽  
Mcgurk Effect ◽  
Audiovisual Speech ◽  
Audiovisual Speech Perception ◽  
Processing Level ◽  
Early Processing ◽  
Audiovisual Fusion

Persons with hearing loss use visual information from articulation to improve their speech perception. Even persons with normal hearing utilise visual information, especially when the stimulus-to-noise ratio is poor. A dramatic demonstration of the role of vision in speech perception is the audiovisual fusion called the ‘McGurk effect’. When the auditory syllable /pa/ is presented in synchrony with the face articulating the syllable /ka/, the subject usually perceives /ta/ or /ka/. The illusory perception is clearly auditory in nature. We recently studied the audiovisual fusion (acoustical /p/, visual /k/) for Finnish (1) syllables, and (2) words. Only 3% of the subjects perceived the syllables according to the acoustical input, ie in 97% of the subjects the perception was influenced by the visual information. For words the percentage of acoustical identifications was 10%. The results demonstrate a very strong influence of visual information of articulation in face-to-face speech perception. Word meaning and sentence context have a negligible influence on the fusion. We have also recorded neuromagnetic responses of the human cortex when the subjects both heard and saw speech. Some subjects showed a distinct response to a ‘McGurk’ stimulus. The response was rather late, emerging about 200 ms from the onset of the auditory stimulus. We suggest that the perisylvian cortex, close to the source area for the auditory 100 ms response (M100), may be activated by the discordant stimuli. The behavioural and neuromagnetic results suggest a precognitive audiovisual speech integration occurring at a relatively early processing level.

scholarly journals Neural Correlates of Modality-Sensitive Deviance Detection in the Audiovisual Oddball Paradigm

2020 ◽  
Vol 10 (6) ◽  
pp. 328
Author(s):  
Melissa Randazzo ◽  
Ryan Priefer ◽  
Paul J. Smith ◽  
Amanda Nagler ◽  
Trey Avery ◽  
...  
Keyword(s):  
Speech Perception ◽  
Visual Information ◽  
Time Window ◽  
Mcgurk Effect ◽  
Predictive Processing ◽  
Visual Signal ◽  
Oddball Paradigm ◽  
Audiovisual Speech ◽  
Late Time ◽  
Audiovisual Speech Perception

The McGurk effect, an incongruent pairing of visual /ga/–acoustic /ba/, creates a fusion illusion /da/ and is the cornerstone of research in audiovisual speech perception. Combination illusions occur given reversal of the input modalities—auditory /ga/-visual /ba/, and percept /bga/. A robust literature shows that fusion illusions in an oddball paradigm evoke a mismatch negativity (MMN) in the auditory cortex, in absence of changes to acoustic stimuli. We compared fusion and combination illusions in a passive oddball paradigm to further examine the influence of visual and auditory aspects of incongruent speech stimuli on the audiovisual MMN. Participants viewed videos under two audiovisual illusion conditions: fusion with visual aspect of the stimulus changing, and combination with auditory aspect of the stimulus changing, as well as two unimodal auditory- and visual-only conditions. Fusion and combination deviants exerted similar influence in generating congruency predictions with significant differences between standards and deviants in the N100 time window. Presence of the MMN in early and late time windows differentiated fusion from combination deviants. When the visual signal changes, a new percept is created, but when the visual is held constant and the auditory changes, the response is suppressed, evoking a later MMN. In alignment with models of predictive processing in audiovisual speech perception, we interpreted our results to indicate that visual information can both predict and suppress auditory speech perception.

scholarly journals Audiovisual speech perception: Moving beyond McGurk

2019 ◽  
Author(s):  
Kristin J. Van Engen ◽  
Avanti Dey ◽  
Mitchell Sommers ◽  
Jonathan E. Peelle
Keyword(s):  
Speech Perception ◽  
Visual Information ◽  
Visual Cues ◽  
Real Life ◽  
Audiovisual Integration ◽  
Mcgurk Effect ◽  
Audiovisual Speech ◽  
Audiovisual Speech Perception ◽  
Combined Use ◽  
Everyday Communication

Although listeners use both auditory and visual cues during speech perception, the cognitive and neural bases for their integration remain a matter of debate. One common approach to measuring multisensory integration is to use McGurk tasks, in which discrepant auditory and visual cues produce auditory percepts that differ from those based solely on unimodal input. Not all listeners show the same degree of susceptibility to the McGurk illusion, and these individual differences in susceptibility are frequently used as a measure of audiovisual integration ability. However, despite their popularity, we argue that McGurk tasks are ill-suited for studying the kind of multisensory speech perception that occurs in real life: McGurk stimuli are often based on isolated syllables (which are rare in conversations) and necessarily rely on audiovisual incongruence that does not occur naturally. Furthermore, recent data show that susceptibility on McGurk tasks does not correlate with performance during natural audiovisual speech perception. Although the McGurk effect is a fascinating illusion, truly understanding the combined use of auditory and visual information during speech perception requires tasks that more closely resemble everyday communication.

Gaze Behaviour in Audiovisual Speech Perception: Asymmetrical Distribution of Face-Directed Fixations

Perception ◽  
10.1068/p5852 ◽  
2007 ◽  
Vol 36 (10) ◽  
pp. 1535-1545 ◽  
Author(s):  
Ian T Everdell ◽  
Heidi Marsh ◽  
Micheal D Yurick ◽  
Kevin G Munhall ◽  
Martin Paré
Keyword(s):  
Speech Perception ◽  
Visual Information ◽  
Speech Intelligibility ◽  
Visual Speech ◽  
Audiovisual Speech ◽  
Audiovisual Speech Perception ◽  
Gaze Fixation ◽  
Dynamic Faces ◽  
Gaze Behaviour ◽  
Speech Information

Speech perception under natural conditions entails integration of auditory and visual information. Understanding how visual and auditory speech information are integrated requires detailed descriptions of the nature and processing of visual speech information. To understand better the process of gathering visual information, we studied the distribution of face-directed fixations of humans performing an audiovisual speech perception task to characterise the degree of asymmetrical viewing and its relationship to speech intelligibility. Participants showed stronger gaze fixation asymmetries while viewing dynamic faces, compared to static faces or face-like objects, especially when gaze was directed to the talkers' eyes. Although speech perception accuracy was significantly enhanced by the viewing of congruent, dynamic faces, we found no correlation between task performance and gaze fixation asymmetry. Most participants preferentially fixated the right side of the faces and their preferences persisted while viewing horizontally mirrored stimuli, different talkers, or static faces. These results suggest that the asymmetrical distributions of gaze fixations reflect the participants' viewing preferences, rather than being a product of asymmetrical faces, but that this behavioural bias does not predict correct audiovisual speech perception.

scholarly journals Weaker McGurk Effect for Rubin’s Vase-Type Speech in People With High Autistic Traits

2021 ◽  
pp. 1-17
Author(s):  
Yuta Ujiie ◽  
Kohske Takahashi
Keyword(s):  
Speech Recognition ◽  
Speech Perception ◽  
Visual Information ◽  
Autistic Traits ◽  
Autism Spectrum ◽  
Mcgurk Effect ◽  
Visual Speech ◽  
Audiovisual Speech ◽  
Autism Spectrum Quotient ◽  
Audiovisual Speech Perception

Abstract While visual information from facial speech modulates auditory speech perception, it is less influential on audiovisual speech perception among autistic individuals than among typically developed individuals. In this study, we investigated the relationship between autistic traits (Autism-Spectrum Quotient; AQ) and the influence of visual speech on the recognition of Rubin’s vase-type speech stimuli with degraded facial speech information. Participants were 31 university students (13 males and 18 females; mean age: 19.2, SD: 1.13 years) who reported normal (or corrected-to-normal) hearing and vision. All participants completed three speech recognition tasks (visual, auditory, and audiovisual stimuli) and the AQ–Japanese version. The results showed that accuracies of speech recognition for visual (i.e., lip-reading) and auditory stimuli were not significantly related to participants’ AQ. In contrast, audiovisual speech perception was less susceptible to facial speech perception among individuals with high rather than low autistic traits. The weaker influence of visual information on audiovisual speech perception in autism spectrum disorder (ASD) was robust regardless of the clarity of the visual information, suggesting a difficulty in the process of audiovisual integration rather than in the visual processing of facial speech.

An Eye-Tracking Study on Audiovisual Speech Perception Strategies Adopted by Normal-Hearing and Deaf Adults Under Different Language Familiarities

2020 ◽  
Vol 63 (7) ◽  
pp. 2245-2254 ◽  
Author(s):  
Jianrong Wang ◽  
Yumeng Zhu ◽  
Yu Chen ◽  
Abdilbar Mamat ◽  
Mei Yu ◽  
...  
Keyword(s):  
Speech Perception ◽  
Eye Tracking ◽  
Normal Hearing ◽  
Audiovisual Speech ◽  
Audiovisual Speech Perception ◽  
Allocation Pattern ◽  
Deaf Adults ◽  
Bilingual Speaker ◽  
Primary Hypothesis ◽  
Standard Chinese

Purpose The primary purpose of this study was to explore the audiovisual speech perception strategies.80.23.47 adopted by normal-hearing and deaf people in processing familiar and unfamiliar languages. Our primary hypothesis was that they would adopt different perception strategies due to different sensory experiences at an early age, limitations of the physical device, and the developmental gap of language, and others. Method Thirty normal-hearing adults and 33 prelingually deaf adults participated in the study. They were asked to perform judgment and listening tasks while watching videos of a Uygur–Mandarin bilingual speaker in a familiar language (Standard Chinese) or an unfamiliar language (Modern Uygur) while their eye movements were recorded by eye-tracking technology. Results Task had a slight influence on the distribution of selective attention, whereas subject and language had significant influences. To be specific, the normal-hearing and the d10eaf participants mainly gazed at the speaker's eyes and mouth, respectively, in the experiment; moreover, while the normal-hearing participants had to stare longer at the speaker's mouth when they confronted with the unfamiliar language Modern Uygur, the deaf participant did not change their attention allocation pattern when perceiving the two languages. Conclusions Normal-hearing and deaf adults adopt different audiovisual speech perception strategies: Normal-hearing adults mainly look at the eyes, and deaf adults mainly look at the mouth. Additionally, language and task can also modulate the speech perception strategy.

scholarly journals Auditory and Visual Lexical Neighborhoods in Audiovisual Speech Perception

2007 ◽  
Vol 11 (4) ◽  
pp. 233-241 ◽  
Author(s):  
Nancy Tye-Murray ◽  
Mitchell Sommers ◽  
Brent Spehar
Keyword(s):  
Speech Perception ◽  
Audiovisual Speech ◽  
Audiovisual Speech Perception ◽  
Lexical Neighborhoods
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