Figure 1.

Partial least squares regression (PLS) discriminant analysis distinguishes ADHD patients (red circles) from control subjects (black squares). Each object in the graph represents one individual. For each individual, the position in the plot is a compact representation of all regional K_i data collected. Objects that appear close to each other are generally similar across all variables. In this case, ADHD patients and controls form separate groups, reflecting underlying group differences in regional K_i values.