The ability to carry out assessments of mental and behavioural state is a useful and required skill for those who work within the healthcare industry, as well as in other professions where there is a routine requirement to work with vulnerable members of the public; this includes nurses and therapists of all specialties and backgrounds, midwives, care assistants, doctors, social workers, school teachers and emergency services, including paramedics and police officers (among numerous other professional groups). This book attempts to break down each aspect of the assessment using psychiatric terminology, definitions and examples in order to provide the reader with a comprehensive guide in how to carry out mental and behavioural state examinations (MBSEs) which is both detailed and concise. It is an essential handbook for those novices and more experienced clinicians alike, who wish to have a concise directory of some of the basic and core theoretical principles which underpin the process of non-medical psychiatric assessment in the 21st century.