Books on Amazon
Brain/world/reality/perception/Frith: thesis: even if our brain works normally, we have no direct access to the world.
Nerve conduction/nerve pathways/Frith: conduction velocity: first measured in 1852 (Helmholtz) 20 msec for 1 meter, sometimes even slower: 100 msec.
Unconscious/Helmholtz/Perception/Frith: Thesis: (because of the slowness of nerve conduction): Perception depends on "unconscious conclusions".
Later he did not need this formulation any more, in order to avoid a confusion with Schopenhauer's linguistic usage.
Wie unser Gehirn die Welt erschafft Heidelberg 2013