What is a diagnostic tool that measures overall well-being and abilities of an individual?

The correct answer, Functional Assessment, serves as a comprehensive approach to measuring an individual's overall well-being and abilities. This tool evaluates a range of factors including physical, social, and emotional functioning, providing a holistic view of the person. It takes into account how an individual engages in daily activities, interacts with others, and copes with challenges, thereby offering insights into their strengths and needs.

While cognitive tests focus primarily on measuring intellectual abilities and mental processes, they do not capture the broader aspects of an individual's overall well-being. Behavioral analysis examines specific behaviors in context, which may not provide a complete picture of an individual's functional capacity. Psychological evaluations delve into mental health and emotional issues but often lack the comprehensive scope found in functional assessments. Thus, functional assessments stand out as the key tool for assessing an individual’s overall functioning and quality of life.