Experiments, in general, include any research in which:

Question

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In experiments, the researcher randomly assigns participants or subjects into the various conditions to ensure that any differences between groups are due to the manipulated independent variable, rather than pre-existing differences between groups or individuals. A and C are incorrect because they either do not involve random assignment or limit participants to only one condition. D is incorrect because participants cannot be assigned to all experimental conditions as each condition typically represents a different level of the independent variable.

Experiments, in General, Include Any Research in Which