Table 2.

Mean values of eight English vowels duration in ms. produced by adults (top half) and children (bottom half) at Time 1 are shown with standard deviation in parentheses. Significantly different mean values between native English and Japanese Group are marked in bold.

	i	ɪ	eɪ	ε	ɑ	ʌ	u	ʊ
NE Adults	143(25)	129(32)	227(40)	177(30)	228(42)	197(33)	225(62)	122(28)
NJ Adults	207(34)	136(61)	260(40)	188(40)	190(37)	204(45)	234(63)	141(29)
NE Children	152(28)	137(25)	255(53)	192(36)	237(39)	216(56)	279(58)	128(27)
NJ Children	173(56)	134(43)	243(65)	174(48)	171(59)	200(58)	223(62)	141(38)