Examlex
Psychological aspects of pain perception can influence the release of the neurotransmitters called __________, the body's natural version of morphine.
Equal Probability
A statistical condition where all outcomes have the same chance or likelihood of occurring.
Experimental Method
A research method involving the manipulation of variables to establish cause-and-effect relationships.
Variable Manipulation
The systematic adjustment or alteration of the independent variables in an experiment to observe their effect on the dependent variables.
Controlled Conditions
A methodological practice in experiments where all variables are kept constant except for the independent variable being tested.
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