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. 2023 Jul 1;274:120153. doi: 10.1016/j.neuroimage.2023.120153

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© 2023 The Author(s)

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 2 — Schematic of stimulus presentation in fNIRS paradigm. Stimuli consisted of 8-second-long sentences of infant directed speech, presented for 25 trials. For the first 15 familiarisation trials (Trials 1–5 = Fam1_NIRS, Trials 6–10 = Fam2_NIRS, Trials 11–15 Fam3_NIRS), the sentence was spoken by a female speaker, followed by 5 trials spoken by a male speaker (Trials 16–20 – Novelty Trials). The final 5 trials were spoken by the same female speaker as for the Familiarisation trials (Post-test Trials). Between each trial, a 10 s silent baseline was presented. Image copyright: Ian Farrell (right hand side photo). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)