Floor Effect Test

A floor effect occurs when a measure possesses a distinct lower limit for potential responses and a large concentration of participants score at or near this limit the opposite of a ceiling effect.

Floor effect test.

Floor effects are occasionally encountered in psychological testing when a test designed to estimate some psychological trait has a minimum standard score that may not distinguish some test takers who differ in their responses on the test item content. The floor effect is a test measure that won t go below a certain point. With other types if the subject doesn t know they aren t. Compare ceiling effect.

How to detect ceiling and floor effects if the maximum or minimum value of a dependent variable is known then one can detect ceiling or floor effects easily. In statistics and measurement theory an artificial lower limit on the value that a variable can attain causing the distribution of scores to be skewed. A floor effect is when most of your subjects score near the bottom. This is even more of a problem with multiple choice tests.

In layperson terms your questions are too hard for the group you are testing. There is very little variance because the floor of your test is too high. The meaning of a floor test a floor test is a motion initiated by the government seeking. For example the distribution of scores on an ability test will be skewed by a floor effect if the test is much too difficult for many of the respondents and many of them obtain zero scores.

The inability of a test to measure or discriminate below a certain point usually because its items are too difficult.