One or both hands touch the heart or chest.
Honesty The person wants to show, that you can trust him/her.
“Let’s be honest: You can trust me.”
Moving the hands to the chest shall demonstrate sincerity. The gesture is easy to fake and it may be used consciously – for example by sales man. If the gesture is shown as a reaction, the person feels attacked and he wants to reaffirm his/her innocence. You can not draw any conclusions about truthfulness from this gesture.
This is one out of 63 gestures from the body language trainer.