Complex sentence: It is still believed by some that this "game" may help dig deeper into a person's subconscious, though it's more likely, however, that any effectiveness of this technique is simply a common misperception.
Split into simpler sentences: It is still believed by some that this "game" may help dig deeper into a person's subconscious mind. More likely, however, any effectiveness of this technique is simply a common misperception.