Final answer:
Santiago employs effortful processing through active rehearsal by silently repeating a person's name to aid memorization.
Step-by-step explanation:
When Santiago repeats a person's name silently to himself several times to help him remember it, he is utilizing a form of processing known as effortful processing. This type of processing requires work and attention to encode information into memory, as opposed to automatic processing, which happens without conscious awareness. By engaging in this repetition, Santiago is using active rehearsal, a strategy that moves information from short-term memory to long-term memory by practicing the information to be remembered.