This panel provides some basic control over which trials from the data
file will be included in the analysis and how those trials will be
grouped together for the purposes of averaging or display.
Variable Parameters
All parameters that vary across trials in the data file are listed
under the title Variable Parameters.
Selected Values
For each variable parameter, all indicates that trials for all
values of this parameter will be included in the analysis. To
restrict the analysis to only those trials for which this parameter
has a particular value, select the desired value.
Group by
These buttons allow the separation into groups (checked) or lumping
together (unchecked) of trials that have different values of the
particular parameter. The buttons are active only where Selected
Values is set to all. If an active button is checked, then
trials for this parameter will be separated into groups on the basis
of the parameter values. If an active button is unchecked, then
trials will be lumped together across all values for the parameter.