Table 1.

Participant characteristics: mean [S.D.] of age, non-verbal IQ percentile, reading age, and productive English vocabulary

	Age	NVIQ percentile	Reading age	Vocabulary (max = 30)
Deaf (n = 13)	27.4 [93.1 months] range: 227–591 months	88.2 [13.3] range: 50–98	15.11 [34.1 months] range: 135–246 months	28.0 [2.61] range: 22–30
Hearing (n = 13)	29.4 [73.8 months] range: 227–520 months	83.2 [19.6] range: 25–99	19.09 [21.7 months] range: 200–264 months	29.4 [0.96] range: 27–30

Deaf and hearing participants did not differ in age or NVIQ (P-values > 0.1). However, reading and vocabulary scores were higher in hearing than deaf participants (P-values < 0.025).