Table 9.

Definitions of Bilingual Variables

Variable Name	Definition	Mean (SD)	Range
Bilingual Proficiency Ratio	English language score ÷ Spanish Language score	1.0 (0.26)	0.47 – 1.65
Length of Bilingualism	(Chronological age - age of second language acquisition) ÷ chronological age	0.81 (0.22)	0.28 – 1.0
Bilingual Exposure Ratio	Weekly % English exposure ÷ weekly % Spanish exposure	1.09 (0.74)	0.15 – 4.0
Primary Caregiver English Proficiency	Self-rating of English speaking ability on a scale from 0 to 10	5.55 (2.85)	1.0 – 10.0
Primary Caregiver English Accent Rating	Self-rating of English accent on a scale from 0 to 10	4.84 (2.86)	0.0 – 9.0