Table 3.

Syllable stimulus frequencies

	Experiment 1		Experiment 2
	Last 45 minutes only	Entire experiment	Last 45 minutes only	Entire experiment
S1 (10 different)	3.000%	3.083%	3.000%	3.083%
S2 (10 different)	3.375%	3.365%	3.500%	3.458%
S3 (10 different)	3.375%	3.365%	3.500%	3.458%
Novel syllables (6 different)	0.417%	0.313%	0%	0%

The frequencies of different acoustic syllables (36 different in Experiment 1, 30 different in Experiment 2; see Tables 1 and 2) shown in percentages for the last 45 minutes (the part that included unexpected syllables) and the entire experiments. During the first 15 minutes (the part without unexpected syllables), the probabilities of S1, S2, and S3 syllables were equal (i.e., 3.333%).