(a,b,c,d) are extremely general scalar quantities measuring any linear complexity the function might have. What does this linear complexity represent in terms of psychology? Well, it probably represents any extraneous alterations to the function, or any complexity it might have not directly stemming from its vector composition. Hence, it could represent the process of educating the function or any number of other building-up activities. Setting a,b,c,d = 1 gives a representation of the psyche upon it's first entry to the world, prior to any experience. We needn't specify anymore except to say that these skew the original value of the function's output in proportion to the numerical value of a,b,c,d.
putting everything together yields: Y= aI^4 - bL^3 + cF^2 - dR