Table 3.

Accuracy rates and reaction times for congruent and incongruent trials in higher-proficiency bilinguals, lower-proficiency bilinguals, and monolinguals.

	Congruent	Accuracy rates % (SE) Incongruent	Overall	Congruent	Reaction times Milliseconds (SE) Incongruent	Overall
Higher-proficiency bilinguals	99.5 (0.8)	89.6 (3.1)	94.5 (1.7)	380.3 (12.2)	447.2 (14.3)	413.8 (12.7)
Lower-proficiency bilinguals	99.2 (0.7)	83.7 (3.0)	91.4 (1.7)	361.6 (11.8)	461.0 (13.8)	411.3 (12.3)
Monolinguals	98.6 (0.5)	81.8 (2.2)	90.2 (1.2)	369.2 (8.6)	462.9 (10.1)	416.0 (9.0)