speech and non-speech audio-visual illusions a developmental study语言和交际视听幻觉发展研究.pdf

Speech and Non-Speech Audio-Visual Illusions: A Developmental Study 1,2 3 1 4 1,2 ´ 1,2 Corinne Tremblay , Franc¸ois Champoux , Patrice Voss , Benoit A. Bacon , Franco Lepore , Hugo Theoret * 1 Department of Psychology, University of Montreal, Montreal, Canada, 2 Research Center, Sainte-Justine Hospital, Montreal, Canada, 3 Speech Language Pathology and Audiology, University of Montreal, Montreal, Canada, 4 Department of Psychology, Bishop’s University, Sherbrooke, Quebec, Canada It is well known that simultaneous presentation of incongruent audio and visual stimuli can lead to illusory percepts. Recent data suggest that distinct processes underlie non-specific intersensory speech as opposed to non-speech perception. However, the development of both speech and non-speech intersensory perception across childhood and adolescence remains poorly defined. Thirty-eight observers aged 5 to 19 were tested on the McGurk effect (an audio-visual illusion involving speech), the Illusory Flash effect and the Fusion effect (two audio-visual illusions not involving speech) to investigate the development of audio-visual interactions and contrast speech vs. non-speech developmental patterns. Whereas the strength of audio-visual speech illusions varied as a direct function of maturational level, performance on non-speech illusory tasks appeared to be homogeneous across all ages. These data support the existence of independent maturational processes underlying speech and non-speech audio-visual illusory effects. Citation: Tremblay C, Champoux F, Voss P, Bacon BA, Lepore F, et al (2007) Speech and Non-Speech Audio-Visual Illusions: A Developmental Study. PLoS ONE 2(8): e742. doi:10.1371/journal.pone.0000742 INTRODUCTION of aud