The recalibration patterns of perceptual synchrony and multisensory integration after exposure to asynchronous speech.
Perceptual synchrony and multisensory integration both vary as a function of stimulus onset asynchrony, but evidences from behavioral, patient, and lesion studies all support some dissociation between these two processes. Although it has been found that both perceptual synchrony and multisensory integration are recalibrated after exposure to asynchronous multisensory stimuli, no studies have directly compared these two recalibration patterns. We addressed this by using McGurk speech and requiring participants to perform simultaneity judgments and a syllable identification task in separate sessions. The results revealed that after exposure to asynchrony, both perceptual synchrony and McGurk fusion shifted toward the temporal lag. The recalibration aftereffects (i.e., the magnitude of shifts) of these two processes have no significant difference and correlation. In addition, McGurk fusion increased strongly at the direction of the temporal lag, which could not be fully explained by fusion shifts. Thus, the present research implies that recalibration patterns of explicit and implicit timing represented by perceptual synchrony and multisensory integration have both similarity and difference.
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing 400715, China; Faculty of Psychology, Southwest University, Chongqing 400715, China.
Xiangyong
X
Yuan
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing 400715, China; Faculty of Psychology, Southwest University, Chongqing 400715, China.
Cuihua
C
Bi
School of Education, Key Lab of Applied Psychology, Chongqing Normal University, Chongqing 400715, China.
Huazhan
H
Yin
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing 400715, China; Faculty of Psychology, Southwest University, Chongqing 400715, China.
Baolin
B
Li
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing 400715, China; Faculty of Psychology, Southwest University, Chongqing 400715, China. Electronic address: xthuang_swu@163.com.
Xiting
X
Huang
D000161:Acoustic Stimulation; D005260:Female; D006801:Humans; D007600:Judgment; D008297:Male; D010775:Photic Stimulation; D013060:Speech; D013067:Speech Perception; D013997:Time Factors; D014796:Visual Perception; D055815:Young Adult
Adaptation; McGurk effect; Multisensory integration; Perceptual synchrony; Temporal recalibration