Examlex
The condition and organization of materials within the activity center are not as important as the activities that take place within the center.
Experimental Design
The process of planning a study to meet specified objectives and ensure that the results are statistically significant and replicable.
Independent Variable
The variable that is manipulated by the researcher to examine its effect on the dependent variable in an experiment.
External Validity
The extent to which the results of a study can be generalized to other situations and to other people.
Confounding Variable
A variable that influences both the dependent and independent variables in a study, potentially misleading the results if not controlled.
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