Fig. 3.

The smallest detectable frequency modulation excursion (FM) is related to spatial selection attention performance in the easiest, anechoic condition, both at the group level and on an individual subject basis. FM thresholds are summarized by gray boxes for bottom- and top-quartile selective attention listener groups (25th to 75th percentiles; gray lines show median). Threshold FM is plotted as a function of the percentage correct on the spatial attention task in the anechoic condition for each listener (individual data points; top abscissa).