The WTMA is a 30-minute paper-and-pencil test of mechanical aptitude designed for use alone or as part of a personnel selection battery in a variety of employment and training settings (e.g., manufacturing/industrial settings), as well as for academic research. It is also suitable for use in many vocational/technical training programs and temporary staffing agencies. The WTMA is appropriate for individuals ages 18 years and older. The WTMA was designed to minimize both gender and ethnic bias, as well as the academic bias found in many other existing instruments. The WTMA questions do not require familiarity with objects or events encountered primarily in a physics or chemistry class or an auto repair shop. The WTMA is used by Fortune 250 and smaller manufacturing companies, as well as several government agencies.