LLN, le 1/02/05
Hi Nicholas, Thomas and others,
>The difference between the Conjunction null and Global null hypothesis...
I would use the Conjunction null hypothesis when looking at common
activations across tasks/conditions. (If we have, say 3 tasks, we
surely want to find areas activated in all 3, not just "at least in
some of them".) If I were to use conjonctions over subjects, then the
Global null hypothesis would sound more appropriate. (I would
probably be delighted if 8/9 out of 10 subjects show the same
pattern, wouldn't you?)
Does this make sense?
Mauro.
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Mauro PESENTI
Research Associate, National Fund for Scientific Research (Belgium)
Unite de Neurosciences Cognitives
Departement de Psychologie
Universite Catholique de Louvain
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