Some of the defining characteristics of hyperthymesia include the ability to “see” depictions of days in their heads with no conscious effort and recollect events that hold personal significance. It is distinguished from other forms of exceptional memory in that it does not involve any form or practice or mnemonic tricks to store information. Studies have shown that hyperthymestics are not like autistic savants but they do exhibit an interest in dates, which they use extensively to categorize when a particular event in their lives happened.