Demography is the composition of a particular human population, including details such as agerange, male-femaleratio, educationalbackground and affiliations, nationality, economicstatus, academic or corporatedesignations.
Situation refers to the set of circumstances in which one finds himself/herself, involving time, venue, occasion, and size of the crowd.
Psychology is the scientific study of the human mind and its functions, especially those affecting behavior in a given context, including values, beliefs, attitudes, preferences, cultural and racialideologies, and needs.