To the extent possible under law, we waive all copyright and related or neighboring rights to the materials on this page. (Of course, we appreciate citations to the relevant papers.)
Stimuli from Magnotti et al
speech stimuli from
Magnotti, JF, Dzeda, KB, Wegner-Clemens, K, Rennig, J, Beauchamp MS. Weak observer-level correlation and strong stimulus-level correlation between the McGurk effect and audiovisual speech-in-noise: a causal inference explanation. Cortex 133 (December 2020) 371-383. Click on the DOI for the journal full text: https://doi.org/10.1016/j.cortex.2020.10.002 Click here for the PDF. Click here for the preprint.
Stimuli from Karas et al
speech stimuli from
Karas, PJ, Magnotti, JF, Metzger, BA, Zhu, LL, Smith, KB, Yoshor D, Beauchamp MS. The visual speech head start improves perception and reduces superior temporal cortex responses to auditory speech. eLife 2019;8:e48116 DOI: 10.7554/eLife.48116 Click here to download the PDF. Click here for the journal full text Click here for the BioRxiv preprint. Click here for an independent replication.
Stimuli from Ozker et al
speech stimuli from
Ozker M, Yoshor D, Beauchamp MS. Converging Evidence from Electrocorticography and BOLD fMRI for a Sharp Functional Boundary in Superior Temporal Gyrus Related to Multisensory Speech Processing. Frontiers in Human Neuroscience, 24 April 2018 doi: 10.3389/fnhum.2018.00141 Click here to download the PDF. Click here to see the preprint on BioRxiv.
Ozker M, Yoshor D, Beauchamp MS. Frontal Cortex Selects Representations of the Talker's Mouth to Aid in Speech Perception. eLife 2018;7:e30387 DOI: 10.7554/eLife.30387 Click here to download the PDF. Click here for the journal full text
Ozker M, Schepers IM, Magnotti JF, Yoshor D, Beauchamp MS. A Double Dissociation between Anterior and Posterior Superior Temporal Gyrus for Processing Audiovisual Speech Demonstrated by Electrocorticography. Journal of Cognitive Neuroscience. June 2017, 29:6, pp. 1044–1060. doi:10.1162/jocn_a_01110. Click here to download the PDF.
The stimuli are adapted from the Hoosier Audiovisual Multi-Talker Database (Sheffert, Lachs & Hernandez,1996).
McGurk and Control Audiovisual Speech Syllables
The McGurk-MacDonald effect is an audiovisual illusion. McGurk stimuli consist of an auditory syllable and an incongruent visual syllable that produce the percept of a different syllable (e.g. auditory "ba" + visual "ga" perceived as "da"). Other incongruent stimuli (e.g. auditory "ga" + visual "ba") do not produce the effect. The archive contains movies that demonstrate the effect. If you use the stimuli in a scientific publication, please cite the appropriate reference in Beauchamp:Publications. Note that some of the videos in the archive require a particular video codec that is freely available in the VLC player, available from http://www.videolan.org/vlc/
Click here to download archive of different McGurk and control syllable stimuli from Nath, AR and Beauchamp, MS. A Neural Basis for Interindividual Differences in the McGurk Effect, a Multisensory Speech Illusion. Neuroimage. 2012 59: 781-787. Click here to download the PDF.
To see the stimuli without downloading the archive, you may view them on YouTube
- Auditory "ba" + Visual "ga" --> AV "da" http://www.youtube.com/watch?v=WK3T7LWIkP8
- Auditory "pa" + Visual "ka" --> AV "ta" http://www.youtube.com/watch?v=An5vvn-gcwA
Click here to download archive of syllable stimuli and stimulus orderings from Nath, AR, Fava EE and Beauchamp, MS. Neural Correlates of Interindividual Differences in Children's Audiovisual Speech Perception. Journal of Neuroscience. 2011 Sept 28;31(39)13963-13971. Click here to download the PDF.
Stimuli and notes from Basu Mallick et al
Here are the McGurk and control stimuli from Experiment 2 in Basu Mallick D, Magnotti JF, Beauchamp MS. Variability and stability in the McGurk effect: contributions of participants, stimuli, time, and response type. Psychonomic Bulletin and Review. (2015) 22:1299–1307. DOI 10.3758/s13423-015-0817-4 Click here to download the PDF.
- Archive of 8 different McGurk stimuli
- Archive of 8 different congruent ba stimuli
- CArchive of 8 different congruent da stimuli
- Archive of 8 different congruent ga stimuli
- Archive of 3 congruent stimuli
Written participant instructions for the task
You will see videos and hear audio clips of a person saying syllables. Please watch the screen at all times. After each video, press a button to indicate what the person said. If you are not sure, take your best guess. The buttons are inactive while the video is playing. Play the demo video to ensure that you can hear the actor and see the actor's entire face clearly. You can play the demo video multiple times. Press the "Begin Task" button to start...
AV recordings of Aesop's Fables used as localizer stimuli from Nath et al., 2012.
Please contact MSB if the link is broken.
Single-syllable audiovisual words
- Nath, AR and Beauchamp, MS. A Neural Basis for Interindividual Differences in the McGurk Effect, a Multisensory Speech Illusion. Neuroimage. 2012 59:781-787.
- Nath, AR, Fava EE and Beauchamp, MS. Neural Correlates of Interindividual Differences in Children's Audiovisual Speech Perception. Journal of Neuroscience. 2011 Sept 28;31(39)13963-13971.
The following is from the methods section of Nath and Beauchamp (2012):
Word stimuli for the localizer were selected from two hundred single-syllable words from the MRC Psycholinguistic Database with Brown verbal frequency of 20 to 200, imageability rating greater than 100, age of acquisition less than 7 years and Kucera-Francis written frequency greater than 80 (Wilson, M., 1988. The MRC Psycholinguistic Database: Machine Readable Dictionary, Version 2. Behav. Res. Methods Instrum. Comput. 20, 6–11.). The duration of the words ranged from 0.5 to 0.7 seconds. The total length of each video clip ranged from 1.1 to 1.8 seconds in order to start and end each video with the speaker in a neutral, mouth-closed position and to include all mouth movements from mouth opening to closing.
Here is a link to a ZIP file containing all of the words. Please contact MSB if the link is broken. https://www.dropbox.com/s/p45pcizxumr1n8v/MRC_Words_1_syl_words.zip?dl=0
Unisensory Visual Eye and Mouth Stimuli from Zhu et al. (2017)
Here are the eye and mouth movements stimuli from Experiment 1 in Zhu LL, Beauchamp MS. Mouth and Voice: A Relationship between Visual and Auditory Preference in the Human Superior Temporal Sulcus. Journal of Neuroscience 8 March 2017, 37 (10) 2697-2708; DOI: https://doi.org/10.1523/JNEUROSCI.2914-16.2017. Click here to download the PDF. The stimuli were created using the H264 codec.
- Click here to download archive of stimuli 1-3
- Click here to download archive of stimuli 4-6
- Click here to download archive of stimuli 7-9
- Click here to download archive of stimulus 10
The stimuli were presented with a grey background on the monitor. If you would like to use any of the following stimuli please cite as: Basu Mallick, D., Magnotti, J.F. & Beauchamp, M.S. (2015, in press). Variability and stability in the McGurk effect: contributions of participants, stimuli, time, and response type.
McGurk Stimuli Available on YouTube
McGurk stimulus: Auditory "ba" + Visual "ga" --> AV "da" http://www.youtube.com/watch?v=WK3T7LWIkP8
McGurk stimulus: Auditory "pa" + Visual "ka" --> AV "ta" http://www.youtube.com/watch?v=An5vvn-gcwA
Bearded guy: http://www.youtube.com/watch?v=aFPtc8BVdJk
Brain Rules Book: http://www.youtube.com/watch?v=I1XWDOwH47Y&NR=1
German guy: http://www.youtube.com/watch?v=rIWrnJH2jAY
Sentence level McGurk guy: http://www.youtube.com/watch?v=DsdyE491KcM
BBC McGurk guy: http://www.youtube.com/watch?v=ypd5txtGdGw&feature=more_related
Curly-haired girl: http://www.youtube.com/watch?v=9aAmTNdkEPw&feature=related
Blue and Yellow Stripe Guy: http://www.youtube.com/watch?v=0bgY6AxeBeU&NR=1
Dk-haired Bearded guy: http://www.youtube.com/watch?v=5Lq26mgFpOc&feature=more_related
Guy with Glasses - words: http://www.youtube.com/watch?v=BgDhafI9n1I&feature=related
Visual Tactile Stimuli
- Click here for video of hand being touched
- Click here for video of probe stopping just short of hand
These stimuli were taken from the directory
Notes on Stimulus Creation
When showed on a video projector (such as for giving a talk), some of Audrey's stimuli are very dark so that the mouth is invisible. To fix this, use iMovie to brighten the clips. The following parameters were used:
exposure/brightness/contrast/saturation 156%/ 53%/ 57%/ 200%
Alternately, use the Auto button in iMovie. This sets the following
Levels (left slider) = 0 Levels (Right slider) = 70%
The new stimuli we recorded were edited on Final Cut Pro, cut to 2 seconds in length with the onset of the sound at the mid-time point. They were exported as .mov files.