PMC

Fixation maps for fixations during presentation of the speech stimuli. Data for participants from all age ranges were combined. Brighter colors indicate a higher consistency of fixations. The theoretical maximum value is 1. This value can only be reached if all participants fixate on exactly the same spot during all trials and during each fixation.

Scatter plots of individual participant performance in the A, V, and AV conditions, and AV gain (AV–V), as a function of age in months. Explained variance (R²) of the linear regression lines for TD (blue) and ASD (red) participants are displayed. Insert panels display the same data expressed as group averaged performance over 1-year increments in the A, AV, and V conditions, and the gain function (AV–A), for TD and ASD children from ages 5 to 17 years of age. For gain, the average of the lowest 4 SNR levels (−15, −12, −9, and −6 dBA) is represented, whereas for the main conditions, the average of all SNR levels is represented.

Multisensory speech recognition performance as a function of diagnosis and age group. Average word recognition performance (% correct) at each SNR and in the no-noise condition (NN) are plotted for both the A and AV conditions for 3 age groups (A: 7–9; B: 10–12; C: 13–15) for TD (blue) and ASD (red) participants. Multisensory gain is represented in the plot of the difference (AV − A). Bar graphs display gain averaged over the 4 lowest SNRs (−15, −12, −9, and −6) for TD and ASD groups, as well as the results of 2-tailed t-tests with effect size (Cohen's d).