Fig. 1

Auditory Task Methodology. (a) Participant numbers at each cohort, time point and task with attrition rates and reasons. Data was analysed using all infants with sufficient data at each time point; for information, the total number of infants who provided artefact-free EEG at both time points was NF1 n = 8; and TD n = 25. (b) ‘Train of vowels’ task design. Three (500 ms) auditory Standards were presented before a Deviant stimulus (500ms) followed by an ITI of ~ 2–3 s. (c) Electrodes chosen for analyses, with different colours depicting frontal left (dark green), frontal central (blue), frontal right (red), posterior left (purple), posterior central (maroon) and posterior right areas (turquoise)