Examlex
_________occurs when a manager purchases stock in a company and refuses to sell it even after it has dropped 40 percent in value over the past 6 months.
Random Assignment
The process of allocating subjects randomly to experimental and control groups in a study to ensure that each participant has an equal chance of being assigned to any group, thus reducing bias.
Correlational Studies
Studies in which the investigator analyzes the relationships among variables that were in place before the study, without manipulating those variables.
Placebo Effects
Observable or measurable changes in health or behavior resulting from the administration of a placebo, demonstrating the power of belief and expectation in the healing process.
Double-blind
A study design in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias in the results.
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