Table 1.

Statistics of the included labs. N refers to the number of infants included in the final analysis.

Lab	Age group	Lang group	Mean age (days)	N	Method
babylab-brookes	12–15 mo	bilingual	394	15	eye-tracking
babylab-brookes	12–15 mo	monolingual	415	14	eye-tracking
babylab-brookes	6–9 mo	bilingual	242	8	eye-tracking
babylab-brookes	6–9 mo	monolingual	238	8	eye-tracking
babylab-princeton	12–15 mo	monolingual	421	14	hand-coding
babylab-princeton	6–9 mo	bilingual	239	9	hand-coding
cdc-ceu	12–15 mo	bilingual	420	11	eye-tracking
cdc-ceu	12–15 mo	monolingual	404	10	eye-tracking
elp-georgetown	12–15 mo	bilingual	416	4	eye-tracking
elp-georgetown	12–15 mo	monolingual	425	7	eye-tracking
elp-georgetown	6–9 mo	bilingual	260	4	eye-tracking
elp-georgetown	6–9 mo	monolingual	242	5	eye-tracking
infantlanglab-utk	12–15 mo	monolingual	408	15	hand-coding
infantlanglab-utk	6–9 mo	monolingual	239	13	hand-coding
irl-concordia	12–15 mo	bilingual	403	14	eye-tracking
irl-concordia	12–15 mo	monolingual	399	16	eye-tracking
irl-concordia	6–9 mo	bilingual	235	11	eye-tracking
irl-concordia	6–9 mo	monolingual	214	7	eye-tracking
koku-hamburg	12–15 mo	monolingual	419	9	eye-tracking
koku-hamburg	6–9 mo	monolingual	234	5	eye-tracking
lll-liv	12–15 mo	bilingual	390	7	eye-tracking
lll-liv	12–15 mo	monolingual	400	15	eye-tracking
lll-liv	6–9 mo	bilingual	235	7	eye-tracking
lll-liv	6–9 mo	monolingual	230	8	eye-tracking
nusinfantlanguagecentre	12–15 mo	bilingual	426	4	hand-coding, eye-tracking
nusinfantlanguagecentre	12–15 mo	monolingual	416	6	hand-coding, eye-tracking
nusinfantlanguagecentre	6–9 mo	bilingual	261	6	eye-tracking
nusinfantlanguagecentre	6–9 mo	monolingual	246	2	eye-tracking, hand-coding
upf_barcelona	12–15 mo	bilingual	414	7	eye-tracking
upf_barcelona	12–15 mo	monolingual	404	11	eye-tracking
weltentdecker-zurich	12–15 mo	bilingual	408	24	eye-tracking
weltentdecker-zurich	12–15 mo	monolingual	416	26	eye-tracking