An integrative account of consciousness should have a number of properties. It should build upon a framework of non-conscious behavior in order to explain how and why consciousness contributes to, and addresses the limitations of, non-conscious processes. It should also encompass the primary (phenomenal), secondary (access) and tertiary (self-awareness) aspects of consciousness. A number of accounts have proposed a role for consciousness in the prediction of sensory input, yet these proposals do not address how organisms deal with multiple, unpredictable, disturbances to maintain control. According to Perceptual Control Theory (PCT), purposiveness is the control of hierarchically organized perceptual variables via changes in output that cou...