Behaviorism and Reality

As a psychology major, I find some ideas of constructivism, especially radical constructivism, at an interesting conflict with the psychological theory of behaviorism. Behaviorism, for those who aren't familiar with the concept, is a branch of psychology that claims that all human behavior is learned through conditioning and observational learning. In other words, human knowledge and behavior results from external forces. They hold the idea that if you change a person's environment, you can also change their behavior. Extreme behaviorists go so far as to deny the idea of Consciousness or any true thought, claiming that they are all conditioned responses. 

Now, what does this have to do with constructivism? Constructivism is at the very core, the idea that things we believe to exist externally, are actually internal mental constructs projected on reality. Radical constructivism would hold the position that absolutely everything we perceive is a mental construct of our mind, especially ideas such as Good, Evil, Beauty, and Art. A radical taken a step further might be called a  solipsist.

These two branches of thought have some very strong arguments behind them, but, they seem to be mutually incompatible. Behaviorism lies on there being an external reality in which influences and affects our behavior. Constructivism argues for an internal reality that is independent of the objective world, especiallSo which one is right, or how can we make these two opposing theories compatible?

A potential solution that appears to me is the idea that One needs to be taught these ideas such as good and evil from an external source, but once it is learned, it is constantly created and projected onto the world at some points even unconsciously. If anyone has any other ideas on the relationship between these two subjects, I would be glad to hear them.