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Detecting Conjunctions Using Cluster Volumes. Edition No. 1

  • ID: 1920001
  • February 2012
  • 68 Pages
  • VDM Publishing House
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In brain mapping literatures, the experiment is repeated on several different subjects or for several different stimuli on the same subject, and the researcher is interested in the common points in the brain where ‘activation’ occurs in all test statistic images. The conjunction is thus defined as those points in the brain that show ‘activation’ in all images. We are interested in which parts of the conjunction are noise, and which show true activation in all test statistic images. Our main result is an approximate P-value for this in the case of the conjunction of two Gaussian or chi square test statistic images. The results are applied to a functional magnetic resonance experiment in pain perception.

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Alemmaya Mulugeta is a senior researcher coordinating a project on Environment Conflict in the Horn of Africa for Swiss Peace Foundation.She received her PhD from the University of Basel, Institute of Social anthropology in 2008.Alemmaya's research focuses on institutions and the role of institutions in the field of violent conflicts.

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