Examlex
Tetanus can be prevented with the DTaP childhood immunization and boosters with the tetanus
toxoid.
Experimental Control
The process of keeping variables constant or regulating external factors to ensure that observed effects are due to manipulated variables only.
Independent Variable
A manipulated factor in an experiment, chosen to determine its potential effect on a dependent outcome.
Dependent Variable
The outcome factor in a study that changes in response to manipulations of the independent variable.
Nonexperimental Method
A research strategy that involves observing and collecting data without manipulating the environmental conditions or variables.
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