This essay analyzes bias that may occur during hypnosis treatment. Site maintained by Dr. Charles T. Tart, Parapsychologist.

The Skeptic's Dictionary hosts this brief definition of experimenter/expectancy effect with links to related information. The Skeptic's Dictionary is edited/managed online by Robert Todd Carroll.

Explore the impact of selection bias by entering some values into this calculator. Site hosted at the University of Calgary.

Access a paper on testing and correcting for sample selection bias. Econpapers is hosted by the Department of Business, Economics, Statistics and Informatics at Örebro University.

This article discusses the use of blinding and placebos to help eliminate observer bias (experimenter effect) in clinical trails and experiments. Site maintained by The Royal College of Physicians of Edinburgh, United Kingdom.

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