References
- 1 2 Larry B. Christensen (2007). Experimental methodology. Pearson/Allyn & Bacon. p. 377. ISBN 978-0-205-48473-7.
 | This science article is a stub. You can help Wikipedia by expanding it. |
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]
| | This science article is a stub. You can help Wikipedia by expanding it. |