Final answer:
The apparent treatment success due to the patient's expectation or hopes rather than the treatment itself is called the placebo effect.
Step-by-step explanation:
The apparent treatment success due to the patient's expectation or hopes rather than the treatment itself is called the placebo effect. It is a psychologically based reaction to a treatment that occurs simply because the patient is treated, even if the treatment is a placebo that has no physiological effect on the patient.