Examlex
Discuss the differences among the varying types of evaluation.
Control Variable
A variable that is kept constant or monitored to minimize its effect on the outcome of the experiment.
Observational Research
A research method where the researcher observes subjects in their natural environment without intervention.
Phenomenon Manipulate
Direct alteration or control exerted over phenomena to investigate causal relationships.
Survey Research
A research method involving the collection of data from a sample of entities to draw inferences about the population of interest, often through questionnaires or interviews.
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