This document discusses two psychological models - the VAK model and the drama triangle. The VAK model describes three preferred learning styles: visual (learning through seeing), auditory (learning through listening) and kinesthetic (learning through experience and doing). Most people have a dominant style but can use all three. The drama triangle explains toxic relationship dynamics where people take on roles as victim, rescuer or persecutor. It describes how these roles satisfy psychological needs but can be dysfunctional. Avoiding these roles and the triangle dynamics can prevent negative effects on projects and teams.