Patients are obviously made away of this before the treatment and so informed consent is obtained however some people believe because patients are vulnerable and distressed and the control is given to the therapist, the patient may feel pressured to stay or their withdrawal may be delayed in trying to convince the therapist that they can not complete the treatment. Limitation as it can be considered unethical. In addition, because some people drop out, time and money may be wasted. Not effective for all people.