 According to IIT, consciousness varies in quantity and comes in many degrees which correspond to φ values.  Thus even a simple system such a single photo diode will be conscious to some degree if it is not contained within a larger complex.  In that sense, IIT implies a form of panpsychism that Tononi explicitly endorses. According to IIT, the quality of the relevant consciousness is determined by the totality of informational relations within the relevant integrated complex.  Thus IIT aims to explain both the quantity and quality of phenomenal consciousness.  Other neuroscientists, notably Christof Koch, have also endorsed the IIT approach (Koch 2012).