This document discusses factors that influence voter behavior and turnout in US elections. It explores sociological and psychological theories for why people vote the way they do. Socioeconomic factors like age, gender, income and education all impact likelihood to vote, with older, female, richer and more educated citizens voting more. Partisanship, social context, attitudes and political knowledge also shape voting decisions. The document examines reasons people may vote based on past performance, future considerations, costs/benefits, and pocketbook or sociotropic issues. Barriers to voting like legal obstacles and decreased social connections can impact turnout.