Wundt's work is significant because it marked the beginning of scientific psychology, separating it from its broader philosophical roots
Wundt's methodology was very controlled so it could be replicated and compared (standardisation)
Introspection is highly subjective as participants self-reported answers
Despite Wundt's efforts to train individuals in the process of introspection, the process remained very subjective. There was very little agreement between individuals.
Behaviourists criticised that Wundt's approach was based on non observable responses. Although participants reported on their conscious experiences, the processes of memory or perception were considered to be unobservable constructions
The scientific approach to psychology relies on belief in determinism (establishing the causes of behaviour through the use of replicable methods)
By focusing on controlling observations, contrived (artificial) situations are created that tell us little about how people act in more natural environments. (low mundane realism)