It seems that economists have determined that people will increase their tendency to act in accordance with a word printed on the inside of a T shirt (even if no-one else can see the word).
Today’s invention is therefore a small, inward-facing electronic badge which lights up when one’s head penetrates (and stretches slightly) the neck hole of a t shirt.
Worn on the inside of the shirt, the badge would flash up a single word eg ‘cooperative’ or ‘clever’ and thus help the wearer achieve their best possible interactions during the challenges of the day ahead.