ScienceDaily (Apr. 17, 2012) — Most people talk to themselves at least every few days, and many report talking to themselves on an hourly basis. What purpose is served by this seemingly irrational behavior? Previous research has suggested that such self-directed speech in children can help guide their behavior. For example, children often talk themselves step-by-step through tying their shoelaces, as if reminding themselves to focus on the job in hand.
It was found that speaking to themselves helped people find the objects more quickly.
The next time you lose your keys, you may want to mutter "keys keys keys" to yourself while searching for them, and just ignore the strange looks you may be getting…