Mona remarks that she is interested in the effects of optimism on physical and mental health. jackson recommends that she explore the works of the psychologists.

Jackson recommends that she explore the works of the POSITIVE psychologists.
Positive psychologists are those psychologists that deal with the study of how humans can attain optimum functioning both physically and mentally. Positive psychology studies the strengths and virtues that enable humans and communities to thrive. 

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.