Although the models with phonetic variability show similar overall segmentation accuracy on noisy data to the original GGJ model, the pattern of errors changes, with less oversegmentation and more un-dersegmentation.
they have difficulty recognizing word tokens that are spoken by a different talker or in a different tone of voice until 11 months (Houston and Jusczyk, 2000;Singh et al., 2004), and the ability to adapt to unfamiliar dialects appears to develop even later, between 15 and 19 months (Best et al., 2009;Heugten and Johnson, in press;White and Aslin, 2011).