According to Wikipedia, vote is the act by an individual expresses support or preference for a certain motion, proposed, candidate or candidate selection for a vote, secretly or publicly. In this sense, the vote represents supreme decision of voters, motivated by different factors and historical and circumstantial reasons, manifested, realized and deposited in the ballot box.
Voting is an act full of cultural meanings, reflecting in orientation customs, habits, preferences, likes and political phobias. Vote is also the result of a cultural and political process. It reflects the voter himself: his past, his present and his future. Where is the vote generated has been definitively an unsolved unknown in political science, although there is some suggestion that vote is generated in conversation and that several and different factors that affect motivation and guidance of vote. Knowing what moves and motivates voters behavior in an electoral context is a question that has been present for many years in the investigations not only scholars of political science, but also from other scientific disciplines like sociology, anthropology, psychology and political marketing; but above all, politicians and candidates during elections try to influence or produce certain effects on the conduct and behavior of citizens.
To try to answer this suggestive questions have emerged from several decades ago, different theories, such as behavioral, rational theory or cultural theory of the vote, which provided some explanatory elements and offered some arguments about the behavior and voter behavior.
Behaviorism, for example, argues that every stimulus is followed by a response, similar to relationship between cause and effect, response is the result of interaction between the individual receiving the stimulus and the environment.
For its part, rational theory (rational choice) believes the voter as a rational being, therefore his actions are rational character. Consequently, their political behavior and orientation elector vote is result of rational calculation in which reasoning of advantages, disadvantages, benefits and risks involved in making a particular decision is made.
In turn, cultural-historical theory emphasizes, inertial and traditional aspects (e.g., family tradition) and habit of voting, political culture or membership in a particular social group, brotherhood or community as factors that predispose, in some way, the vote.
So to answer the question for whom will you vote there are a number of factors underlying that the researcher must take into account to obtain reliable information. If you are on electoral time you should get close to professionals who understand the sociocultural spectrum and reflected it adequately in its methodology.