TABLE 1.

Characteristics of participants in experiments 1 and 2

	Experiment 1 (School-age CPT)	Experiment 2 (Preschool CPT)
Cause of hearing loss	1 genetic, 1 CMV	3 genetic
	11 meningitis	13 meningitis
	28 unknown	31 unknown
Ear of implantation	18 right, 23 left	27 right, 20 left
Pure-tone average (dB HL)	112.6 (5.66)	111.1 (5.78)
Number of active electrodes	19.8 (4.14)	19.8 (3.42)
Age at implantation (yr)	6.2 (1.60)	4.8 (1.34)
Communication mode	15 OC, 26 TC	22 OC, 25 TC
Nonverbal IQ	101.3 (16.53)	99.4 (14.43)

For continuous variables, the mean value for each experiment is given with standard deviation in parentheses. Nonverbal IQ scores were available for 19 of 41 children in Experiment 1 and 37 of 47 children in Experiment 2.