The Myers-Briggs Type Indicator (MBTI) and DiSC assessments are personality assessments used for leadership development, communication, and team development. The MBTI focuses on preferences for taking in information and making decisions, providing a four-letter type and facets. DiSC examines behavior in work environments. Both have reliable and valid measurement properties and can be administered online or with paper/pencil. Qualified interpreters help individuals understand and apply their results.