Ceiling effect
Ceiling effect
The Ceiling effect (/ˈsiːlɪŋ ɪˈfɛkt/) is a phenomenon observed in psychometric testing, where the observed variable is not able to measure a difference in scores in the upper range of the variable. This effect can occur in any situation where there is a limit or maximum capacity to the variable being measured.
Etymology
The term "ceiling effect" is derived from the metaphor of a physical ceiling. Just as a physical ceiling limits how high one can physically go, the ceiling effect limits how high a score or value can go on a test or measurement tool.
Related Terms
- Floor effect: The opposite of the ceiling effect, where the observed variable is not able to measure a difference in scores in the lower range of the variable.
- Psychometrics: The field of study concerned with the theory and technique of psychological measurement, which includes the measurement of knowledge, abilities, attitudes, and personality traits.
- Variable (research): Any characteristic, number, or quantity that can be measured or counted. A variable may also be called a data item.
See Also
External links
- Medical encyclopedia article on Ceiling effect
- Wikipedia's article - Ceiling effect
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