Table 1. Further information regarding deaf participants.

Gender	Age	1st Language	Cause of Deafness	Age became deaf	Parents deaf?
F	31	BSL	Genetic	Birth	Y
M	42	English	Maternal rubella	Birth	N
M	22	BSL	Unknown	Birth	N
M	21	English	Unknown	4 years	N
M	39	English	Maternal rubella	Birth	N
M	19	English	Unknown	Birth	N
M	32	English	Genetic	Birth	Mother deaf
M	35	English	Unknown	Birth	N
M	20	English	Unknown	Birth	N
F	27	English	Genetic	Birth	Mother deaf
M	29	English	Unknown	Birth	N
F	40	BSL	Genetic	Birth	N
F	25	English	Meningitis	2 years	N
F	26	English	Unknown	Birth	N

Table 1 Details the cause and onset of deafness, as well as native language for the 14 deaf participants in our study.