One of the great preoccupations of political science is the exploration of relationships between politics and government and major aspects of their environment. Geography, occupational class, type of society, and ethnicity are among the factors that are studied as independent variables for the dependent variable of political behavior. Elections are obvious places to look for clues to those relationships. During democratic election campaigns and the voting that follows, those who govern and those who aspire to replace them communicate with the governed more fully, intensely, and concretely than at any other time in normal political life. That arena is scoured frenetically with survey research and close analysis of electoral demography to discover non political influences on political behavior. Also, much recent attention has been given by psephologists to the impact of the spread of television set ownership on election campaigning and voting.