Table 2. Results of two-way ANOVA for F1 of adjacent pairs

Pair	Variable	df	F-value	p-value
/i/-/ɪ/	Vowel	1	17.030	.000***
	Level	2	10.260	.000***
	Vowel×level	2	12.207	.000***
/ɛ/-/æ/	Vowel	1	3.986	.048*
	Level	2	6.610	.002**
	Vowel×level	2	1.302	.275
/ʌ/-/ɔ/	Vowel	1	.122	.727
	Level	2	.238	.789
	Vowel×level	2	.101	.904
/ɔ/-/ɑ/	Vowel	1	12.472	.001**
	Level	2	.828	.442
	Vowel×level	2	.487	.617
/u/-/ʊ/	Vowel	1	3.141	.078
	Level	2	.546	.580
	Vowel×level	2	.853	.428

p<.05,
p<.01,
p<.001.