. Author manuscript; available in PMC: 2019 Jan 1.

Published in final edited form as: Cochlear Implants Int. 2017 Oct 10;19(1):26–37. doi: 10.1080/14670100.2017.1380114

Table 4.

Effect size of mean differences in NHz-scores for Number of Different Root Words (NDRW), Number of Different Bound Morphemes (NDBM), and Mean Length of Utterance in Words (MLU-w), between children with different ages of implantation and similar durations of CI use. A Cohen’s D value of greater than 0.8 is considered a large effect size.

			Cohen’s d of Mean Difference
Age of implantation (in months)	N	Duration of CI use in months	NDRW	MLU-w	NDBM
6–11	27	33	1.02	0.88	0.92
19–24	24	34	1.02	0.88	0.92
12–18	41	28	0.87	1.04	1.40
25–30	14	27	0.87	1.04	1.40
19–24	24	22	0.31	0.32	.48
31–38	20	21	0.31	0.32	.48