Scaling is another tool in Motivational Interviewing. Using a scale to help an individual to evaluate where they currently stand on a particular issue. Using a Readiness Ruler is one way to use scaling. Readiness Rulers are used to discuss readiness, confidence, and importance about change with clients. Readiness Rulers can also help people discuss an abstract issue using a concrete visual aid. Using a Readiness Ruler can increase change talk and assist in facilitating change behavior.