SPM,
>
>I asked a similar question recently but am still in search of an answer.
>
>Our study design has 3 sessions per subject (per visit). We plan to
>specify a DCM per session before performing group BMS in which all 3
>sessions per subject will be averaged. I'm aware that a number of DCM
>papers remove subjects that do not show significant activation inside VOI
>selection criteria (peak voxel within X mm of group peak, etc). Does any
>one have any suggestions for how to handle the potential event in which
>activation in a VOI in one or two sessions per subject (of the total 3
>sessions) do not meet selection criteria? Is it advisable to remove only
>this session and average over two instead of three or remove this subject
>entirely?
>
>Also, to clarify for parameter interpretation which statement is correct?
>
>For the connection A-->B,
>increases in activity of B correspond to 10% of the activity in A per
>unit time when the parameter is 0.10.
>
>For the connection A-->B,
>Increases in activity in A result in a 10% increase in activity in B per
>unit time when the parameter is 0.10. C
>
>
>
>
>Many thanks,
>
>Drew
>
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