Variable Arguments

Every trial command has a list of arguments which defines the content and command specific options. In order to re-use a trial definition with different content and settings, arguments can be declared as variable arguments by setting a ‘?’ or ‘*’ symbol instead of a fixed value. In this case, the values for the variable arguments will be defined when launching the trial from the block or session level.

Variable arguments are internally indexed from top down in the order they appear in the trial definition. To reuse a variable argument within the same trial definition, you may add an index to reference the previous argument:

 ?[Index]

The ‘?’ or ‘*’ symbol have the same meaning and can be used interchangeable.