does not use a high level of control. This is due to the fact that this research design is done by letting variables occur naturally therefore a control is not as significant. An example of an experimental research design is medication testing that takes place in a lab with one group being placed in an experimental group, or the ones being manipulated, while the other is placed in a placebo group, or inert condition or non-manipulated group. An example of a nonexperimental group is let's say we're curious about how violent men and women are. We cannot have a true experimental study because our predictor variable for violence is gender. To have a true experimental study we would need to be able to manipulate
the predictor variable. If we had a way to switch men into women and women into men, back and forth, so that we could see which gender is more violent, then we could run a true experimental study. But, we can't do that. So, our little experiment becomes a non-experimental study because we cannot manipulate our predictor variable (study.com, 2017) Burns, N., Gray, J., & Grive, S. (2015). Understanding nursing research (6th ed.). St. Louis, Missouri: Elsevier Sunders. - research-differences-advantages-disadvantages.html TOPIC 3 DQ 2 What is sampling theory? Describe it and provide examples to illustrate your definition. Discuss generalizability as it applies to nursing research. Sampling theory was developed to determine the most effective way to acquire a sample that accurately reflects the population under study. Key concepts of sampling theory include populations, target population, sampling or eligibility criteria, accessible population, elements, representativeness, sampling frames, and sampling methods or plans. In order to increase the control of a study and decrease the potential for bias, the subjects who are initially selected with nonrandom sampling method are often randomly assigned to the control group. The purpose of developing sampling theory was to establish the most efficient way to obtain a sample which truthfully depicts the population that is being studied. Basic models of sampling theory comprise of populations, target population, sampling or eligibility criteria, accessible population, elements, representativeness, sampling frames, and sampling methods or plans.
TOPIC 4 DQ 1 Extraneous variables may have an influence on the dependent variable. In what ways do researchers attempt to control extraneous variables? Support your answer with current literature. Extraneous variables
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