Studies suggest that only about a quarter of our thoughts are verbal. The rest take the form of images, emotions, or sensory awareness—meaning not everyone "talks" inside their head.
To study this, researchers signal participants randomly during the day to record what they are thinking, preventing inaccurate recollection later.
Experts note that internal dialogue is just one way of thinking. Some people think mostly in visuals, others through feelings. This may explain why techniques like "positive thinking" or self-talk do not have the same effect on everyone.