- How to use the Hemodynamic Response Function (HRF) Plot

The plot is based on a specific HRF function model (cf: Mark S. Cohen,
"Parametric Analysis of fMRI Data Using Linear Systems Methods", 
NeuroImage, 6, 93-103, 1997) under no noise conditions. The value of
the functions are arbitrary on units.

If you click the 'Plot individual condition' menu, the HRF of each
condition and their average (blue dash line) will be plotted on the 
respective condition row in different color. If you click the 'Plot
combined condition' menu, the HRF of all condition will be plotted 
on all condition rows in different color. The Red dot average line
represents the combined conditions average over the same time points
as the individual condition.