Fig. 2

Data quality assessment. A. Distribution of mean signal-to-noise ratio in the pulse frequency band (i.e., 0.5–2 Hz) from (i) full samples (participant number = 112, 321 biological motion runs) and (ii) final samples (i.e., participant number = 44, NAI n = 21, and ASD n = 23). B. Distribution of good measurement percentage of all measurements within 4 cm source-detector separation for (i) full and (ii) final sample. NAI and ASD groups did not significantly differ from each other (p = 0.469, z = 0.724). C. Distribution of post-censoring median GVTD (i) of all runs of all participants and (ii) final sample. In the final sample, there is no significant difference in median GVTD (p = 0.07, z = 1.8) between NAI and ASD cohorts