Explain what is meant by the contention that Gestalt theory used field theory as its model and that empirical-associationistic psychology used Newtonian physics as its model.  What is the phi...

Explain what is meant by the contention that Gestalt theory used field theory as its model and that empirical-associationistic psychology used Newtonian physics as its model.

 What is the phi phenomenon? What was its importance in the formation of the Gestalt school of psychology?