Examlex
Under which of the following circumstances can spending money make people happier?
Control Variable
A variable that is kept constant during a research experiment to ensure that the effect of the independent variable can be measured without interference.
Demand Characteristics
Subtle cues or signals in an experimental setting that influence participants' behaviors or responses, potentially affecting the study's validity.
Placebo
A substance with no therapeutic effect, used as a control in testing new drugs.
Randomization
is a process of randomly assigning subjects to different groups in an experiment to ensure that each group is similar and that the results are not biased.
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