# Transitional Probabilities - $\text{Prob of }Y|X = \frac{\text{freq of} XY}{\text{freq of }X}$ - Longer listening times for non-words indicates recognition of words - Transitional probabilities can be high within words, and low at word boundaries as in Aslin et al - But then you can also manipulate the frequency at which each word occurs, and in doing so, also the frequency of the syllables - Graf Estes et al - Transition frequencies can be made high because two words occur very often next to each other