Dear SPM users,
I have a few questions concerning conjunction analyses. I have read the
mail archives and actually am now more confused. I would really
appreciate any input that you may have.
I have a study with 9 subjects. I would like to do a conjunction
analysis but have several questions.
1. Should corrected or uncorreted p values be used for the analysis. The
mailbase continually refers to uncorrected p values.
2. In relation to question 1, should a height threshold be used. I have
worked with SPM and realize that extent thresholds cannot be used with
conjunction analyses.
3. What p value is most appropriate? A recent mail from Karl stated that
between .5 and .05 is most approptiate. At what level (i.e. simple
threshold or heith threshold) is this entered? Also, could you explain
why such a p value is appropriate.
Thank you in advance for any help that you can offer.
Paul Laurienti
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