Perception affects our behaviour and activity.
We perceive we in control of what we do, but in reality you are much more controlled by your contigencies and perceptual patterning, language and the extent that you can manipulate the symbols and environment to achieve the outcomes you prefer than you might think. The perceptions of patients are influenced by their expectations. What they perceive will depend on what things mean to them. What things mean will depend on their past experience and their knowledge. The importance of good communication is crucial.