Research Nursing

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Written Assignment 2
Liberty University

What is a research hypothesis? Define directional, nondirectional, and statistical/null hypothesis statements. A research hypothesis is a statement about two variables, independent and dependent, and their relationship with an expected outcome based on the research question which, if directional, will state the expected direction of the relationship between the independent and dependent variables. If the research hypothesis is nondirectional it will not state the expected direction within the relationship of the variables but that a relationship exists. The statistical hypothesis or null hypothesis states there is no relationship between the independent and dependent variables and failure to reject the null hypothesis will support the research hypothesis. (LoBiondo-Wood & Haber, 2006)

Define the following: independent variable, dependent variable (note that the dependent variable is of primary interest to the researcher). The independent variable is manipulated in experimental research studies and assumed to occur naturally in nonexperimental studies to measure or observe the effect on the dependent variable. The dependent variable is not changed or manipulated and is the variable that is studied by changes in the independent variable. The dependent variable is what the researcher is interested in explaining, understanding, or predicting. (LoBiondo-Wood & Haber, 2006)

Identify the independent and dependent variable in the following statement: Women who attend childbirth classes will be less likely to use pain medication than women who do not attend childbirth classes. The dependent variable is pain medicine, which women would take less of if independent variable, childbirth classes, is present.

In your own words, explain the interrelationships between a research question, literature review, theoretical framework, and hypothesis. The research question must be measurable, show relationship between...
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