Before revision:  The first two are descriptive settings: (  i) a framework of dynamical models inspired by the classical mechanics of a particle in a given potential, which comprises Hull model and also a specific model encoding resistance to learning in the first few sessions followed by an over-optimal response peak ;
After revision:  The first two are descriptive settings: ( i) a framework of dynamical models predicting resistance to learning in the first few sessions followed by an over-optimal response peak ;