Whereas the psychodynamic perspective looks at the internal mechanisms to explain behaviour, the behaviourist approach is said to be formed by environmental influences we learn from the people and things around us. This nurture approach believes when a child is born their mind is blank and while growing up what we hear, see, touch, taste and smell will influence our behaviour. Behaviourists argue we have no free will and our environment determines what we learn and normal behaviour is the possession of these learned responses, through classical or operant conditioning. The behaviourist explanation for human behaviour is also widely used in the social work profession and one which can be applied to Tina's case.
Putting aside philosophical issues, it is easy to see that, by logic, the Monotheistic religions are also being influenced by spiritual communications that are “of the devil” (if everybody is, then so are they).
Named after the philosophy espoused by Niccolò Machiavelli in The Prince , people who score high on this trait are cynical (in an amoral self-interest sense, not in a doubtful or skeptical sense), unprincipled, believe in interpersonal manipulation as the key for life success, and behave accordingly.  Scores on measures of Machiavellianism correlate negatively with agreeableness (r= -.47) and conscientiousness (r=-.34).  Machiavellianism is also significantly correlated with psychopathy . 
But consider what it must be like to be her. Hannah’s concern for other people doesn’t derive from particular appreciation or respect for them; her concern is indiscriminate and applies to strangers as well as friends. She also does not endorse a guiding principle based on compassion and kindness. Rather, Hannah is compelled by hyperarousal—her drive is unstoppable . Her experience is the opposite of selfishness but just as extreme. A selfish person might go through life indifferent to the pleasure and pain of others—ninety-nine for him and one for everyone else—while in Hannah’s case, the feelings of others are always in her head—ninety-nine for everyone else and one for her.