Examlex
Which of the following statements best describes Parkinson's disease?
Third Variable
A factor that is not directly involved in an experimental setting but that may affect the relationship between the independent and dependent variables.
Correlation Coefficient
A numerical measure that represents the strength and direction of a relationship between two variables, ranging from -1 to 1.
Placebo Effect
A phenomenon in which a person's condition improves because they believe they are receiving treatment, even though the treatment has no therapeutic value.
Participant Bias
A type of bias that occurs when participants in a study act or respond differently because they know they are being observed.
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