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Mean peak amplitudes and latencies of N200 responses evoked by coherence (A–B) and speed (C–D) increments for each subject group (line color). A–B. Higher coherence increments generate larger amplitude and shorter latency responses in all groups. C–D. EADs are insensitive to the magnitude of speed increments, while YNCs and ONCs show larger responses to bigger increments. N200 latencies separate YNCs from both ONCs and EADs.
