<p>In a related field, astronomy, significant contributions have been made be people without even a bachelor’s. The discover of Pluto, for example, Clyde Tombaugh was a non-degree technician at the Lowell observatory. Physicists with only bachelor degrees work in the field of radiology, and they’re hired as physicists. </p>
<p>In some fields the professional label is controlled by law. In the mental health field only those who a license can represent themselves as psychologists for the purpose of providing professional services. Academics in psychology departments and researchers can also call themselves psychologists.</p>