This is how mouth guards can change the way we talk - "A little more attentive"

- There are very subtle and less subtle signals that are transmitted in both the upper and lower part of the face.

You may have to pay a little more attention to your conversation partner if the lower half is hidden, says Gullberg.

However, she is doubtful that the mouth guards would not make us start weighing our words on a golden scale.

- It is not only the mouth that is used to convey an attitude, but you have the rest of your body at your disposal.

See Professor of Psycholinguistics Marianne Gullberg explain how we interpret the face and what, if anything, can be changed with mouth guards in the clip above.