Behavior modification theory suggests that we can change behavior. how?

Reward The Positive: Behavior modification theory is based on a simple idea: reward positive and ignore negative behavior. Often used in parenting children. An example: 2 children are playing side-by-side sharing their toys are verbally praised and 5 minutes is added to their play time, a third child refuses to share and is placed in a brief time-out effectively ignoring the negative behavior. Consistency is the key.