Have you ever gotten weird looks after someone asked you, "Who are you talking to?" And you responded, "Myself." Well, fret no more, because you're not actually going crazy. Good news for your social stature, because according to a recent study, talking to yourself may indicate a higher level of intelligence.
According to scientists at Bangor University, speaking out loud to yourself was found to be a trait of higher cognitive function. During the UK-based school's study, 28 participants were given instructions that they were told to either read out loud or quietly to themselves. The researchers then measured how the participants performed the tasks.
It was found that the participants who read the instructions out loud were more concentrated and performed the task more efficiently. So, no, it's not a sign of mental illness if you're seen mumbling under your breath.