In the article, Chiesa evaluates the stance for taking the mechanistic account as a scientific framework for contemporary psychology by comparing mechanistic and relational accounts for causes and explanations for behaviours. She rejects the causal mechanistic chains, which sees behaviours being linear and sequential and could be broken down into independent components, as explanations of behaviour: where there occurs a problem in behaviour, one could find the faulty component within the chain and fix or remove it, then behaviour would function normally again. The problem is that when one aspect of behaviour is malfunctioning, it affects other components related to it, so it is hardly simply as solving the problem component will solve the whole problem. For the relational nature of behaviours, human factors and environmental factors, Chiesa suggested the radical behavioural account, which sees behaviours as a complex unity of personal experiences and environmental factors is more appropriate when describing and explaining causal relationship for behaviours since it is based on empirically derived theories.