Article Figures & Data
Figures
- Figure 1.
Experimental conditions. a–f, Participants listened to 6 different pairs of concurrent sounds. Pairs varied in the location of sound 1 (either 90° or 45° from the midline, shown by the position of the black circle in the left and right columns, respectively) and in the spatial separation between sound 1 and sound 2 (0°, 90°, or 135° contralateral to sound 1, shown by the position of the black cross in the top, middle, and bottom rows, respectively). Half of the participants were tested with sound 1 in the left hemisphere, as shown, and half in the right.
- Figure 2.
Region-of-interest (ROI). Shown is the group-aligned (Goebel et al., 2006) overlap of individual participant's ROIs (n = 10) in the left hemisphere of a representative participant.
- Figure 3.
Experiment models. A–F, Each model consisted of two conditions shown separately in red and blue. A blue outline indicates a sound location common to both conditions. Circles and crosses represent locations for sounds 1 and 2, respectively, with locations at −90°, −45°, 0°, +45°, and +90° (black markers from left to right on each semicircle/horizontal line). Lowercase letters (a–f) illustrate models in a diagram (unscaled) representation of perceptual space, where acuity is amplified around the midline. Red and blue lines indicate perceptual separation between concurrent sounds in each condition.
- Figure 4.
Prescanning stimulus validation. Shown is the group average target detection during prescan stimulus validation with SE bars (n = 10). *p < 0.0001.
- Figure 5.
Behavior inside the scanner. Shown is the group average performance on the behavioral task with SE bars (n = 10). *p < 0.001.
- Figure 6.
DAC. Shown are individual (circles) and group median (bars, n = 10) DAC in each hemisphere for six models (Fig. 3A–F). Chance level, indicated by the dashed line, was calculated separately for each participant and hemisphere and was combined across models. Hemispheres were coded ipsilaterally or contralaterally relative to the location of sound 1. *q < 0.05.
- Figure 7.
Euclidean distance across trials. Shown are individual (circles) and group median (horizontal bars) average pairwise Euclidean distance across trial repetitions for the two conditions shown in Figure 1, d and e (n = 10).
