Figure 1.

A, Scatter plot of 1st and 2nd formant of each vowel. B, Stimulus set in IPA notation. Deviant pseudowords were produced by cross-splicing the two STD pseudowords either at the end of the first syllable (XYY) or at the end of the second syllable (XXY). Two additional NEW pseudowords with a XYX structure were used only in a forced choice test at the end of experiment 2. C, In both experiments, stimuli were presented in 13 blocks separated by 20 s. Within each block, pseudowords were presented with an inter stimulus interval between 900 and 1300 ms. The first blocks consisted solely of STD pseudowords. Subsequent blocks were composed of 84% STD pseudowords 8% XYY deviant pseudowords and 8% XXY deviant pseudowords. Pseudoword order was pseudo-random. A minimum of two and a maximum of four STD pseudowords were presented between deviants and no deviants were presented more than two times consecutively.