The facial expression of a character animal or emoji is used to communicate data as "happy" or "sad" in lieu of using a number or color.

A mechanism that causes someone to make a verbal or written promise to another person to complete an action.

Ways to enhance people's environmentally conscientious identity is a foundation to persistent intrinsic motivation.

A digital, physical, or emotional reward given to the participant after they complete a task or improve their performance.

The mechanism of how behaviors, values, and preferences spread from one person to another via social contact.

A tool for people to publicly display their green performance that stimulates others to imitate the behavior.