Aperson who has suffered a major stroke and is now experiencing severe personality problems because of the damage would best be advised to see a

Psychiatrist

Explanation:

A psychiatrist is a doctor who specializes in psychiatry. Psychiatry is the branch of medicine that studies mental disorders. This is significantly different from psychologists, who are not medical doctors. Therefore, psychiatrists often use methods that resemble those of doctors who study physical illnesses. Psychiatrists can provide medicine, as well as psychotherapy and medical management.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

well this isn't a question but if you are asking if it is true or false it is, true.