Two essential ingredients in a social-psychological experiment are

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Control refers to the ability of the researcher to manipulate the independent variable and minimize the influence of extraneous variables, while random assignment refers to the assignment of participants to different experimental conditions in a random and unbiased manner. These two components are essential to ensure that the experiment is well-controlled and that the results are more likely to be valid and reliable. Options A and B both involve deception, which is not always necessary or ethical in social-psychological experiments. Option C refers to potential sources of bias that researchers need to be aware of but is not a specific component of an experiment.

Two Essential Ingredients in a Social-Psychological Experiment Are