Table 1 Change in oxy‐Hb concentration (mean).

Participant	IDS		ADS
	Ch1	Ch2	Ch1	Ch2
1	−0.93	−1.65	0.01	0.25
2	1.12	0.26	−0.67	−0.40
3	0.23	0.51	−0.22	0.65
4	0.63	−0.89	0.07	0.31
5	−0.30	−0.75	−0.95	−0.67
6	0.24	0.20	−0.25	−0.58
7	0.54	0.50	−1.10	−1.13
8	1.08	0.66	−0.91	−1.15
9	0.56	0.07	0.58	−0.33
10	−1.36	−1.34	−0.10	−0.27
11	−0.45	−0.22	1.12	0.75
12	0.11	0.19	0.27	0.60
13	1.59	1.15	0.94	3.40
14	0.56	1.00	−0.87	−0.88
15	−0.03	0.02	0.10	−0.37
16	0.29	0.66	−0.63	−1.33
17	0.53	0.86	−0.95	−1.40
18	2.41	2.18	−0.35	0.25
19	0.18	−0.23	−1.14	−1.22
20	−0.06	−0.10	−0.23	−0.33
Mean	0.35	0.15	−0.26	−0.19
(SD)	(0.81)	(0.86)	(0.64)	(1.06)

ADS, adult‐directed speech; ch, channel; IDS, infant‐directed speech; oxy‐Hb, oxyhaemoglobin.