Clark has suggested a two-way "cascade of cortical processing" underlying
perception,
action, and
learning. He posits a model where 'error units' are generated by comparing the expected outcome of a given process with the actual outcome, and these are used to refine the prediction of outcome in the future, creating a
feedback loop between prediction and error. He posits that interactions between the 'forward' flow of error and 'backward' flow of prediction are dynamic, with factors such as attention, dopamine production, changes in environment, and one's individual personality affecting this two-way system. Clark's writings also focus on the concept of
transhumanism, such as in his work
Natural-Born Cyborgs, which explores the fusion of human biology and technological implants through a series of contemporary technological studies and an evaluation of the
cyborg figure in pop-culture.
Extended mind thesis Clark has also worked on the
extended mind thesis, which says that the mind extends into the environment. Clark spoke about this thesis in TEDxLambeth 2019. ==Personal life==