Dear All,
When using parametric modulation, is there a way to determine the optimal number of possible parameter values? I think this is important because the more possible parameter values there are ( i.e. the greater the weightings are) , the greater extent we will modulate the response over trials. So I am wondering whether there exists a certain optimal number of parametric values.
For example, let's say that I want to use subjective ratings as a parameter. How many rating levels should I use?
Any comments and advice would be greatly appreciated. Thanks in advance!
Ce
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