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The way in which individual participants assign a written production to a particular speaker when they have to associate a text that they hear to the same text written by different writers is examined. Our investigations have sought to establish whether individual participants are able to identify the written production that should be assigned to a speaker, or whether they converge in assigning a written production to a speaker even if it is not his/her own writing. The research consists of, first, a set of six experiments requiring the matching of written and vocal productions by different groups of participants and, second, an evaluation of these productions by two other groups of participants. It appeared that the participants were unable to perceive « objective » correspondences between oral and written productions coming from the same individual. However, there was broad spontaneous consensus in the tested population. The results suggest that the criteria used by participants in carrying out their matchings are linked to specific associations of perceived characteristics of voices and written productions. The participants were most confident in their choices when there was a high degree of spontaneous consensus in the group.
