The specialty area that Dr. Roberts' research best represent is that of personality psychology.
<u>Explanation:
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The personality of any given person is a culmination of a number of traits and attributes that the person possesses.
These traits and attributes are not just physical (external) but are also mental (internal) .
The study of these traits to compare between two distinct traits like that of impulsiveness and sociability can be termed under the knowledge discipline of personality psychology.
