hlth200

Exam 1 Stuff Chapters 1-7

research is a systematic investigation that is empirical in nature and is to contribute to public knowledge. Research questions are the central issues being addressed in the study  Causal studies- at last two major variables of interest that might affect the problem Descriptive sudies- designed to document what is going on or what exists relational studies- look at  relationships between two or more variables empirical- based on direct observations and measurements of reality probablistic- inferences based on probablities causal- interested in what leads to what Is it possible to do the study to answer your research question?  Feasibillity includes the following : making a trade off between rigor and practicallity, how long the research will take, the ethical constraints, and wheter you can auire the cooperation needed to take the project to a successful conclusion. Determine the degree to which the costs will be manageable.

Studies and Relationships

Observational Studies- understand cause and effect relationships however the researcher can not control how the subjects are assigned to groups or which treatment they receive cross sectional study-  a study that takes place at a single point in time. You are pin pointing one specific event in a series of events.  longitudinal study- a study hat takes place over time, measurement occurs on at least two separate occasions. When you measure at different time points its called measuring multiple waves. Two or three waves measurements are repeated measures. Many waves of measurement is a time series.

positive relationship- high values on one variable are associated with hih values on another negative relationshhup- high vaues on one variable are associated with low values on another (inverse relationship) cur