Niamh is eight years old and suffers from a medical condition which means she often has to go into hospital.
Each time she goes into hospital, the treatment makes her feel sick. One day, Niamh's mother took her to visit her grandmother in hospital. When they arrived at the hospital, Niamh complained to her mother that she felt sick.
Referring to features of the behaviourist approach in psychology, explain why Niamh felt sick when she went to visit her grandmother in hospital.