Dear SPM users,
In the 'attention to motion' example data set for DCM which is available
at http://www.fil.ion.ucl.ac.uk/spm/data/ the design matrix is formulated as
follows:
Column1: Factor Photic
Column2: Factor Attention
Column3: Factor Motion
We're currently trying to apply DCM to an exeriment with 2 Factors:
1: StimType (Visually presented Words vs Objects)
2: Repetition (First vs second presentation of the stimulus)
Our design matrix looks as follows:
Column1: Condition Words-First presentation;
Column2: Condition Objects-First Presentation;
Column3: Condition Words-Second Presentation;
Column4: Condition Objects-Second Presentation.
Can we use this design for DCM analysis, or do we have to reformulate the
design matrix?
Best regards,
Matthias Schurz
University of Salzburg (Austria)
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