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"Video lottery" and treatment for pathological gambling. A natural experiment in South Dakota

R D Carr1, J E Buchkoski, L Kofoed

  • 1Department of Psychiatry, USD School of Medicine, Sioux Falls, USA.

South Dakota Journal of Medicine
|January 1, 1996
PubMed

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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...