The arena of forensics often requires that the human factors expert witness do research that deviates from the classical paradigm of rigid control of independent variables to obtain resulting data. Indeed, in the judicial process, an experiment with only one independent variable and a single subject (or device) may reach beyond statistical significance and be vitally pivotal to judicial decisions. This article provides examples in which very limited research experiments were conducted by the author and that provided critical data to assist juries to reach conclusions pertinent to human behavior and equipment design in accident situations.
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