title: McGurk stimuli for the investigation of multisensory integration in cochlear implant users: The Oldenburg Audio Visual Speech Stimuli (OLAVS).
abstract: The concurrent presentation of different auditory and visual syllables may result in the perception of a third syllable, reflecting an illusory fusion of visual and auditory information. This well-known McGurk effect is frequently used for the study of audio-visual integration. Recently, it was shown that the McGurk effect is strongly stimulus-dependent, which complicates comparisons across perceivers and inferences across studies. To overcome this limitation, we developed the freely available Oldenburg audio-visual speech stimuli (OLAVS), consisting of 8 different talkers and 12 different syllable combinations. The quality of the OLAVS set was evaluated with 24 normal-hearing subjects. All 96 stimuli were characterized based on their stimulus disparity, which was obtained from a probabilistic model (cf. Magnotti & Beauchamp, 2015). Moreover, the McGurk effect was studied in eight adult cochlear implant (CI) users. By applying the individual, stimulus-independent parameters of the probabilistic model, the predicted effect of stronger audio-visual integration in CI users could be confirmed, demonstrating the validity of the new stimulus material.
authors: Department of Psychology, Neuropsychology Lab, European Medical School, Carl von Ossietzky University of Oldenburg, Ammerländer Herrstraße 114-118, 26129, Oldenburg, Germany. maren.stropahl@uni-oldenburg.de.
authors: Maren
authors: M
authors: Stropahl
authors: Institute of Hearing Technology and Audiology, Jade University of Applied Sciences, Oldenburg, Germany.
authors: Sebastian
authors: S
authors: Schellhardt
authors: Department of Psychology, Neuropsychology Lab, European Medical School, Carl von Ossietzky University of Oldenburg, Ammerländer Herrstraße 114-118, 26129, Oldenburg, Germany.|Cluster of Excellence Hearing4all Oldenburg, Oldenburg, Germany.
authors: Stefan
authors: S
authors: Debener
mesh_terms: D000328:Adult; D000368:Aged; D003054:Cochlear Implants; D005260:Female; D034381:Hearing Loss / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013067:Speech Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Audio-visual integration; Cochlear implants; McGurk illusion