Longitudinal study is a research design that deals with the collection and analysis of data over period of time. Longitudinal research design tracks the same variables that are growing, developing or changing over long or short period of time. for instance. For example: If we experiment changes for George W. Bush on the pre and post 2000 election surveys and the pre and post 2002 election surveys. how respondents felt toward George W. Bush as a result of the election?
It is hypothesized that over the past decade battered women violence is accepted as a justification for self-defense in homicide cases. In my hypothesis, it is predicting of the relationship between variables. It is valid because it is falsifiable and may undergo changes until research progresses.