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)
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