The Minnesota Multiphasic Personality Inventory (currently the MMPI/2) was initially developed almost sixty years ago. It has been revised and is now the product of greater than twenty thousand scientific journal articles.
It not only provides objective information regarding the presence or absence of psychological disorder, it reveals underlying problems and runs internal checks to determine if the individual is exaggerating or minimizing complaints.
It is not only the greater than 550 test items and their content that are valuable to you, but this diagnostic inventory, when accurately scored and profiled provides you with clinical scales that reveal anxiety, depression, and even psychotic thought disorder.
There are continually new scales for the MMPI being developed, and not only does it provide raw data, but it provides profile configurations that help understand, predict and ideally control the behavior of a patient.
It is certainly not the only clinical diagnostic tool used to determine the suitability of a patient for surgery, but it is arguably the most commonly used. It is a very cost effective means of determining if this patient is emotionally capable of dealing with surgeries and their aftermath.