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Richard's left arm was amputated 3 years ago after a workplace injury. Even though the limb is gone, Richard sometimes feels like he still has a left arm. In addition, when Richard shaves the left side of his face, it feels as though someone is touching his missing left arm. What mechanisms explain this strange phenomenon?
Experimental Research
A systematic and scientific approach to research in which the researcher manipulates one or more variables to observe the effect on some behavior or mental process.
Survey
A method of gathering information from a sample of individuals through questions to generalize findings to a larger population.
Experimentation
A method of scientific investigation involving the manipulation and controlled testing of variables to establish cause and effect relationships.
Correlational Research
A research method that examines the relationship between two or more variables to determine if a correlation exists.
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