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SUMMARY:BSU Seminar: &quot\;Graphical and summary diagnostics for node lev
 el adequacy in Bayesian hierarchical models&quot\; - Ida Scheel\, Universi
 ty of Oslo
DTSTART:20240213T140000Z
DTEND:20240213T150000Z
UID:TALK211231@talks.cam.ac.uk
CONTACT:Alison Quenault
DESCRIPTION:For Bayesian hierarchical models represented by directed acycl
 ic graphs\, all neighbours of a node provide\, potentially conflicting\, i
 nformation on the node. Hence identifying potential conflict between these
  different information sources can be important for assessing the adequacy
  of Bayesian hierarchical models. Building on this idea originating from [
 1]\, [3] constructed node based conflict measures that have been shown to 
 be well calibrated. Sharing the idea of considering potential conflict bet
 ween separate information sources for each node\, [4] constructed a graphi
 cal diagnostic lcp. This can be used both to identify conflict at each nod
 e\, and provide insight into the nature of the conflict\, hence being more
  informative than summary diagnostics. We link these two ideas together by
  constructing a new diagnostic plot iic-lcp that is supplementary to lcp\,
  but builds on the framework of [3]. It has the advantage over the lcp wit
 h the possibility to display curves corresponding to different parameters 
 in the same plot\, saving space and easing comparisons\, particularly usef
 ul for sets of parameters representing exchangeable groups. We show how to
  visually read some of the conflict measures defined in [3] from iic-lcp\,
  combining graphical and summary diagnostics.
LOCATION:Online Seminar
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