Floor effect

Floor effect

In statistics, the term floor effect refers to when data cannot take on a value lower than some particular number, called the floor.

An example of this is when an IQ test is given to young children who have either (a) been given training or (b) have been given no training. If the test is too difficult (so difficult that no amount of training will affect the ability to carry out the test), both group (a) and group (b) will perform particularly bad. This does not necessarily lead to the conclusion that the training has no effect on the ability to complete the IQ test. In fact, this may lead to a Type II error. The IQ test is too difficult, and by making the questions less difficult, training may have an effect on the ability to complete the IQ score.

Here, the floor effect is the data all hitting the bottom end of the distribution due to the extreme difficulty of the task. A ceiling effect is precisely the opposite - all participants reaching the high end of the distribution (e.g. the test was too easy).


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Wet floor effect — is a graphic effects technique popular in conjunction Web 2.0 style pages created by James Cunningham, particularly in logos. The effect can be done manually or an auxiliary tool can be installed to create the effect automatically. Unlike a… …   Wikipedia

  • floor covering — Finish material on floors, including wood strips, parquet, linoleum, vinyl, asphalt tile, rubber, cork, epoxy resins, ceramic tile, and carpeting. Wood strip flooring, attached to a subfloor of plywood, is most popular, especially for residences …   Universalium

  • Floor Area Ratio — The Floor Area Ratio (FAR) or Floor Space Index (FSI) is the ratio of the total floor area of buildings on a certain location to the size of the land of that location, or the limit imposed on such a ratio.The Floor Area Ratio is the total… …   Wikipedia

  • Effect of Hurricane Katrina on Tulane University — As a result of Hurricane Katrina and its effects on New Orleans, Tulane University was closed for the second time in its history mdash;the first being during the American Civil War. The university closed for four months during Katrina, as… …   Wikipedia

  • Ceiling effect — In pharmacology, the term ceiling effect refers to the property of increasing doses of a given medication to have progressively smaller incremental effect (an example of diminishing returns). Narcotics, such as nalbuphine, serve as a classic… …   Wikipedia

  • Ceiling effect — Der Begriff Deckeneffekt beschreibt mehrere Effekte verschiedener Fachrichtungen. Generell versteht man unter einen Deckeneffekt, dass sich Veränderungen in den unabhängigen Variablen zu keinen Veränderung in den abhängigen Variablen… …   Deutsch Wikipedia

  • Low-floor bus — Kneeling bus and buggy bus redirect here A low floor bus is a bus that has no steps between one or more entrances and part or all of the passenger cabin. Being low floor improves the accessibility of the tram for the public, particularly the… …   Wikipedia

  • Sprung floor — A sprung floor is a floor that absorbs shocks giving it a softer feel. Such floors are considered the best available for dance and indoor sports and physical education.They enhance performance and greatly reduce injuries. Modern sprung floors are …   Wikipedia

  • Stack effect — is the movement of air into and out of buildings, chimneys, flue gas stacks, or other containers, and is driven by buoyancy. Buoyancy occurs due to a difference in indoor to outdoor air density resulting from temperature and moisture differences …   Wikipedia

  • Mass Effect: Revelation —   …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”