Table of Contents
Entropy, Volume 21, Issue 1 (January 2019)
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Cover Story (view full-size image) A key aspect of the brain activity underlying consciousness and cognition appears to be complex [...] Read more. A key aspect of the brain activity underlying consciousness and cognition appears to be complex dynamics—meaning that brain activity shows a balance between integration and segregation. There have now been many attempts to build useful measures of complexity, most notably within Integrated Information Theory. In this paper, we describe, using a uniform notation, six different candidate measures of integrated information, then we set out the intuitions behind each, and explore how they behave in a variety of network models. The most striking finding is that the measures all behave very differently: no two measures show consistent agreement across all our analyses. By rigorously comparing these measures, we are able to identify those that better reflect the underlying intuitions of integrated information, which we believe will be of help as these measures continue to be developed and refined. View Paper here.