interesting question,
I wonder what these 4 psychological levels are you are referring too.
This is what I have found:
taken from:
http://www.arthurmjackson.com/wchap13.html
"He hypothesizes that there are four psychological levels of integration or control. The first, called the hedonic level, refers simply to the effects of pleasure and pain in organizing and selecting forms of behavior. This mode of control is quite primitive and is found in all organisms, even the very lowest. Its effect is to move an individual towards a source of pleasure and away from a source of pain."
(p. 70) "The second level of integration Rado calls the brute-emotional level....'basic' emotions of fear, rage, love, and grief....In a sense the overt behavior is an amplifier of whatever feeling state exists in the organism."
"Rado calls the third level of integration the emotional-thought level, and it is associated with a notable increase in encephalization of the brain."
"At this level of control, emotions are more restrained and more mixed. Derivative emotions appear such as apprehension, annoyance, jealousy, and envy."
"The fourth level of regulation of action Rado calls the unemotional-thought level. This involves the mastery of events by rational, intellectual means alone. The key elements of such mastery are foresight and postponement of reaction. Reason can overrule the evaluation of events determined by immediate feelings of pleasure or pain and can lead an individual to engage in painful means designed to achieve pleasurable goals."