Dear SPM ninjas
We have a problem with a first level model (see attached design matrix). We
specify a model containing 4 sessions. Each has 2 conditions with a series
of parametric modulations. After specification, the design matrix reveals 3
greyed (“not uniquely specified”) regressors.
The the grey regressors occur in the parametric modulations, and are the
last regressor in the third session and the last 2 parameters of the fourth
session.
When the .mat file is checked, all the regressor values appear correct and
appear to be uniquely specified.
Any help would be much appreciated!
Cheers
Chris
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