“…The participants' task was to listen to each stimulus sequence and to perform a standard classification of the perceived quality of motion into one of four categories: (1) simultaneous presentation -all sounds were heard at the same time, (2) continuous motion -a single sound moved continuously from one side to the other, (3) broken motion -the movement was discontinuous, broken and interrupted and (4) succession of discrete events -the sounds were perceived successively, with no movement between them. This standard categorization system, originally developed by Briggs and Perrot (1972) for the study of AAM, has been used in a number of subsequent investigations on AAM (e.g., Perrot, 1974;Strybel et al, 1989Strybel et al, , 1990Strybel et al, , 1992 and in a modified form on VAM (e.g., Bruns and Getzmann, 2008;Getzmann, 2007;Strybel and Menges, 1998;Strybel and Vatakis, 2004). Prior to the experimental session, the participant was instructed about the experimental procedure, was thereafter given ten stimulus sequences as an example, and was afterwards allowed to ask questions to the experimenter.…”