Everyone else perhaps, has a basic idea of the general range of abilities available from someone with these senses.
By definition a 'PSYCHIC' is someone with extra sensory perception pertained through mental force and 'reading' by way of 'telepathy' and 'energy' within the aura or energy field, known as the 'etheric or energetic body'. This is something EVERY living and breathing thing has, including plants and animals. Extensions of PSYCHIC abilities, where the energy of a living person is read, can be psychometry. A fascinating demonstration of how an inanimate object can store energy memory. So a personal item to the client, such as a bracelet or favourite broach will hold this energy for the Psychic to 'read'.
Below is one of many diagram's available to show how the energy and it's power centre's (Chakra's) would look if it was naturally visible.
This one can be described by using the word channel also. This level of ability is where the reader will access information from the Spirit world via guides or direct from passed loved ones. This is a great one for distant readings because the recipient (client) does not have to be sat in front of the Medium for the process to work. All the information will be accessed through a channel of energy (or conduit) into the medium and presented to the recipient.
So can a Psychic be a Medium ? Absolutely YES, there are levels of abilities right across the spectrum of the Spiritual realm. From souls having had a human experience, or incarnation's, to Angels and guides, who have never had a physical earth presence and never will. So of course it can be so with the level of learning for us too. We all have the ability to sense energy on some level and do it without even realising. The 'butterflies' nervy sensation aswel as 'there is just something about them I don't like feeling'...we all know that one! These are often referred to as 'instinct' or 'gut feeling'...same thing. Learn to notice these signs, listen to your gut feeling and go with your instinct after all we usually kick ourselves when we don't.
So praise yourself more often and trust your own intuition. Life is a series of lessons, rewards and challenges. Sometimes we don't always spot it immediately but when we come out the other side, it is up to us whether we learn or stay where as/we are.