What does 'external validity' refer to in research methodology?
The extent that results can be generalized to other scenarios.
The degree to which test covers the material studied.
The consistency of results in repeating the same experiment.
The extent to which an experiment avoids confounding of variables.
How does correlation differ from causation in research?
Causation shows a relation, correlation infers one variable affects another.
Correlation implies effect while causation shows a relationship.
Correlation is a hypothesis, causation is evidence.
Correlation identifies a relationship, causation implies one variable affects another.
What is the role of a 'control group' in an experiment?
It is the group that is manipulated to create a result.
It assesses the overall effect of independent variables on the subject.
It is a group where no experimental conditions are imposed.
It measures the variables of the experiment.