Gary Lupyan and Daniel Swingley carried out a study to learn whether talking to yourself is beneficial. The researchers made two experiments:
In one of them participants were shown 20 images of everyday objects and asked to search out a specific one. Initially volunteers were to search for the pic in complete silence. Aterwards they were asked to repeatedly say the name of the object they were looking for. People managed to complete the task in half the time when they talked to themselves.
In the second experiment, the participants performed a virtual shopping task. They were presented with the wide range of typical objects sold at the supermarkets. They were asked to locate the specific item. Again, when people talked to themselves, they completed the task in half the time.