^ Joseph McCabe. (1920). Spiritualism: A Popular History from 1847. Dodd, Mead and Company. pp. 110–12. A Mr. Merrifield was present at one of the sittings. Home's usual phenomena were messages, the moving of objects (presumably at a distance), and the playing of an accordion which he held with one hand under the shadow of the table. But from an early date in America he had been accustomed occasionally to "materialise" hands (as it was afterwards called). The sitters would, in the darkness, faintly see a ghostly hand and arm, or they might feel the touch of an icy limb. Mr. Merrifield and the other sitters saw a "spirit-hand" stretch across the faintly lit space of the window. But Mr. Merrifield says that Home sat, or crouched, low in a low chair, and that the "spirit-hand" was a false limb on the end of Home's arm. At other times, he says, he saw that Home was using his foot."
No doubt a great importance in the paranormal field is the problem of fraud. The field of psychic research and spiritualism has been so notoriously full of charlatans, such as the Fox sisters and Eusapia Palladino–individuals who claim to have special power and gifts but who are actually conjurers who have hoodwinked scientists and the public as well–that we have to be especially cautious about claims made on their behalf.[61]
While I still am unsure why the translucence varies, I believe it’s a mixture of how closely they are still tied to the physical earth (more connected to earth, more ‘earthly’ looking, less connected, more ‘spirity’ looking). I also think it has to do with their skill level at being able to appear and the amount of energy they have to appear - it takes a lot of skill and energy to appear as a human in physical form without an actual physical body to work with!
Another important distinction is that while psychic readings often focus on predicting future events, mediums primarily tune into past and present issues. It's my opinion that predicting the future, while sometimes helpful, runs the risk of disempowering people. Always remember that you do have a say in how your future unfolds. Despite what any psychic or medium may "see" in your future, it is important to remember you were given the gift of free will when you came into this world, and at any moment in time you can absolutely redirect your course and create the life you want by changing your thoughts and actions. Psychic information is often just insight into what potentially could happen based on the road you are currently traveling—and it should be used only as a guideline to help you make the best choices for yourself.
In 1954, the psychical researcher Rudolf Lambert published a report revealing details about a case of fraud that was covered up by many early members of the Institute Metapsychique International (IMI).[166] Lambert who had studied Gustav Geley's files on the medium Eva Carrière discovered photographs depicting fraudulent ectoplasm taken by her companion Juliette Bisson.[166] Various "materializations" were artificially attached to Eva's hair by wires. The discovery was never published by Geley. Eugéne Osty (the director of the institute) and members Jean Meyer, Albert von Schrenck-Notzing and Charles Richet all knew about the fraudulent photographs but were firm believers in mediumship phenomena so demanded the scandal be kept secret.[166]
In 2013 Rose Marks and members of her family were convicted of fraud for a series of crimes spanning 20 years entailing between $20 and $45 million. They told vulnerable clients that to solve their problems they had to give the purported psychics money and valuables. Marks and family promised to return the cash and goods after "cleansing" them. Prosecutors established they had no intent to return the property.[199][200][201]
Rebecca Rosen has served as a bridge between this world and those who have crossed over to the other side for the past 10 years. Her work has led to many guest appearances, including Entertainment Tonight, The Rachael Ray Show and Nightline, and her first book, Spirited: Connect to the Guides All Around You (HarperCollins). Due to the high and growing demand for spiritual truth, she has committed herself fulltime to serving as a medium and also educates thousands of people around the country with her seminars, lectures and workshops. Learn more about Rosen by visiting her website. 

^ "Glossary of Key Words Frequently Used in Parapsychology" Archived 2010-12-24 at the Wayback Machine, Parapsychological Association website. "Materialization: A phenomenon of physical mediumship in which living entities or inanimate objects are caused to take form, sometimes from ectoplasm." Retrieved January 24, 2006 "Medium – Definition". Dictionary.com. Retrieved 23 March 2007.
In old-line Spiritualism, a portion of the services, generally toward the end, is given over to demonstrations of mediumship through contact with the spirits of the dead. A typical example of this way of describing a mediumistic church service is found in the 1958 autobiography of C. Dorreen Phillips. She writes of the worship services at the Spiritualist Camp Chesterfield in Chesterfield, Indiana: "Services are held each afternoon, consisting of hymns, a lecture on philosophy, and demonstrations of mediumship."[20]
Next, I ask for the Spirit who is ready for your session to appear to me. Sometimes, they appear in front of me, next to me, right behind me, sitting on my living room couch, standing at the bottom of the stairs, in the kitchen near the stove - basically wherever I am and going to be looking, that’s where they show up. At this time, I can see most of the features of your loved one - their appearance. And generally, they look exactly as they did when they were alive, though they do get to choose the age in which they appear (who wouldn’t?!). https://drive.google.com/file/d/1Omljtyr-JT80C5YTsQ5yj2vktUGjUvRF/view?usp=sharing
Senses used by mental mediums are sometimes defined differently from in other paranormal fields. A medium is said to have psychic abilities but not all psychics function as mediums. The term clairvoyance, for instance, may include seeing spirit and visions instilled by the spirit world. The Parapsychological Association defines "clairvoyance" as information derived directly from an external physical source.[37]