Table 1.

Number of monolingual and bilingual infants in each age group that met infant-level inclusion criteria, average years of maternal education (SES), and average NAE exposure for blingual infants by lab. The table is ordered by NAE exposure. Note that because of lab-level inclusion criteria, cells with n < 10 were excluded from the meta-analyses, but were included in the mixed-effects regression analyses. Labs that only tested monolingual infants are not listed.

institution	method	6–9 mo bilingual	6–9 mo monolingual	12–15 mo bilingual	12–15 mo monolingual	average years of maternal education	bilinguals’ average NAE
Oxford Brookes University	singlescreen	17	15	17	16	16.79	0.00
Western Sydney University	hpp	9	15	15	15	17.00	0.00
Universite Paris Descartes	hpp	10	0	1	16	16.37	0.00
Central European University	eyetracking	0	0	14	13	18.09	0.00
University of Liverpool	eyetracking	7	18	6	15	17.59	0.00
Ecole Normale Superieure	eyetracking	0	0	16	14	16.98	0.00
National University of Singapore	eyetracking	26	10	12	10	14.98	0.00
University of Zurich	eyetracking	0	0	28	30	15.17	0.00
University of Goettingen	singlescreen	9	31	7	15	16.06	0.00
McGill University	hpp	0	0	16	11	18.12	28.63
University of Manitoba	hpp	7	26	8	16	15.58	47.16
University of British Columbia (Werker)	hpp	15	20	0	0	16.33	48.88
Concordia University	eyetracking	16	17	18	18	16.69	48.98
Princeton University	hpp	15	1	0	0	18.02	49.07
University of California Los Angeles	hpp	0	0	9	3	14.86	53.04
University of Ottawa	singlescreen	7	17	18	11	18.31	54.79
University of British Columbia (Hamlin)	eyetracking	10	11	0	0	16.60	55.69