One behaviourist assumption is that all behaviour is learned through interactions with the environment, not inherited biologically. According to the idea that we are born as a ‘blank slate’, individuals develop behaviours purely through experiences. for example, a person might develop a fear of dogs if they were bitten or scared by one as a child. This early experience becomes an environmental stimulus that influences their future reactions. This shows how the fear is not innate but shaped by environmental exposure, supporting the behaviourist view that nurture plays a greater role than nature in behaviour development.