What is it called when you repeat an experiment?
Summary. Getting the same result when an experiment is repeated is called replication. If research results can be replicated, it means they are more likely to be correct.
Why might a scientist repeat an experiment?
1) The first reason to repeat experiments is simply to verify results. Different science disciplines have different criteria for determining what good results are. 2) The next reason to repeat experiments is to develop skills necessary to extend established methods and develop new experiments.
What do scientist write after an experiment?
When scientists conduct an experiment and analyze the results, the next step is to write up a report that describes the experiment and the results and submit it for publication in a scientific or medical journal that is “peer reviewed.”
What have scientists changed in the experiment?
the dependent variable is what changes because of the independent variable in an experiment. the independent variable is what the experimenter(?) changes for different experiment groups, and the dependent variable is the outcome of those changes.
What is the purpose of a case-control study?
A case-control study is designed to help determine if an exposure is associated with an outcome (i.e., disease or condition of interest). In theory, the case-control study can be described simply. First, identify the cases (a group known to have the outcome) and the controls (a group known to be free of the outcome).
What are controls in a study?
A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.
What is the primary objective of any case control or cohort study?
The goal is to retrospectively determine the exposure to the risk factor of interest from each of the two groups of individuals: cases and controls. These studies are designed to estimate odds. Case control studies are also known as “retrospective studies” and “case-referent studies.”
What is the difference between cohort and case-control?
Whereas the cohort study is concerned with frequency of disease in exposed and non-exposed individuals, the case-control study is concerned with the frequency and amount of exposure in subjects with a specific disease (cases) and people without the disease (controls).
Do cohort studies have a control group?
Cohort studies differ from clinical trials in that no intervention, treatment, or exposure is administered to participants in a cohort design; and no control group is defined. The study is controlled by including other common characteristics of the cohort in the statistical analysis.
Why are cohort studies better than Case Control?
Cohort studies work well for rare exposures–you can specifically select people exposed to a certain factor. But this design does not work for rare diseases–you would then need a large study group to find sufficient disease cases. Case-control studies are relatively simple to conduct.
What are some examples of cohorts?
Examples of cohorts commonly used in sociological research include birth cohorts (a group of people born during the same period of time, like a generation) and educational cohorts (a group of people who begin schooling or an educational program at the same time, like this year’s freshman class of college students).