표 4. | Table 4. 아버지 아동지향발화와 성인지향발화 간 발화길이 및 발화당 음절 수 비교 | Comparison of utterance duration and number of syllables per utterance between fathers’ infant-directed speech and adult-directed speech

Measure	IDS (n=10)			ADS (n=10)
	Mean	SD	Range	Mean	SD	Range
Utterance duration (sec)	1.35	0.19	1.04–1.61	1.73	0.53	0.87–2.35
Number of syllables per utterance	7.95	1.48	6.07–10.39	10.16	2.72	5.88–13.75

IDS, infant-directed speech; ADS, adult-directed speech.