Unit 2 Methods of ResearchOnline version matching game for Mr. Daniel by Abby Augustitus 1 terms 2 definitions scientific method operational definition confounding variable hindsight bias random assignment placebo effect The tendency to believe, after learning an outcome, that one would have foreseen it (Also known as the I-knew-it-all-along phenomenon). A factor other than the independent variable that might produce an effect in an experiment. Illusory Correlation The perception of a relationship where none exists. Placebo Effect Latin for "I shall please", Experimental results caused by expectations alone; any effect on behavior caused by the administration of an inert substance or condition, which the recipient assumes is an active agent. A self-correcting process for asking questions and observing nature's answers. Assigning participants to experimental and control groups by chance, thus minimizing preexisting differences between those assigned to different groups. A statement of the procedures (operations) used to define research variables. For example, human intelligence may be operationally defined as what an intelligence test measures.
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