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Nursing Research

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In a nonexperimental research, the resreacher only collect datas without introducing treatments or making changes. Here the researcher studies the relationship between two or more variables in natural settings without manipulation or control.
In corelational design, the researcher studies the strenght of relationship between variables by observing how the changes in one variable is correlated with changes in the other variable. In genearal correlational studies have dependent and independent variables and often it is the effect of the independent variable on the dependent variable that is observed without manipulation.
The advantage of nonexperimental design studies are that they are close to real life situations, numerous human characteristice are inherently not subject to manipulation example, blood type, personality, health beliefs, medical diagnosis it makes nonexperimental research studies suitable for nursing research. Also there are many variables that can technically be manipulated but manipulation is forbiden on ethical grounds.
The major disadvantage is that the result obtained and the relationships between the dependent and independent variables can never be absolutely clear or error free. It is true that non experimental nursing research studies are conducted for comparative purposes using non randomly selected groups which may not be homogenous and in fact often dissimilar in different traits and characteristics’ which affects the authenticity and lead to faulty generalization of the research finding. According to Polit, D. (2014): Essentials of Nursing Research Appraising Evidence for Nursing Practice (8th Edition), page 160, descriptive correlational design studies tend to describe the relationships between variables without attempting to infer the casual connection. It therefore does not explain the underlying cause of the variable of interest.

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