<em>Community psychology</em><em> is determined as one of the different branches in psychology that encompass the study of the way different individuals tends to communicate or relate to their specific communities and also the opposite effect of these communities in the individuals' life.</em>
<em>However,</em><em> community psychologists research the problem, unpleasant, and undesirable situations of different communities to uncover various ways in order to make improvements. </em>
<em>Dr Preston is most likely a community psychologist.</em>