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Instrument effect

From Wikipedia, the free encyclopedia

The instrument effect is an issue in experimental methodology meaning that any change during the measurement, or, the instrument, may influence the research validity.[1] For example, in a control group design experiment, if the instruments used to measure the performance of the experiment group and the control group are different, a wrong conclusion about the experiment would be reached, the research result would be invalid.[1]

References

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  1. ^ a b Larry B. Christensen (2007). Experimental methodology. Pearson/Allyn & Bacon. p. 377. ISBN 978-0-205-48473-7.