The Concept of Evidence: A Critical Review
Kathy Kellermann · Argumentation and Advocacy · 1980
Empirical research on the use of evidence in argument has produced ambiguous and contradictory findings. In part, the confusion results from failure to provide precise conceptualizations and operationalizations for the evidence construct. Equally important is that investigations have shown a seeming disregard for proper methodological procedures. As a result, little knowledge can be gained from these studies.