Discriminability is generally defined as the ability to distinguish between one stimulus and another. In the Recognition-by-components theory of object perception, Discriminability is a property of geons , which indicates that each geon can be distinguished from other geons from almost all viewpoints. In item analysis , Discriminability is how well an item performs in relation to some criterion. For example, items may be compared according to how well they separate groups who score high and low on the test . The index of discrimination would then be the correlation between performance on an item and performance on the whole test.

Related Articles

Accidental viewpoint at psychology-glossary.com■■■■■■
Accidental viewpoint refers to a viewpoint relative to an object that results in perception of an accidental . . . Read More
Concrete operations at psychology-glossary.com■■■■■
Concrete operations refers to the third stage in Piaget’s theory of cognitive development applying . . . Read More
Geons at psychology-glossary.com■■■■■
Geons (geometric icons) refer to the volumetric features of Biederman"s recognition-by-components Theory . . . Read More
Self-efficacy at psychology-glossary.com■■■■
Self-efficacy refers to a sense that one is competent and effective, distinguished from self-esteem, . . . Read More
Center for Epidemiologic Studies of Depression Scale at psychology-glossary.com■■■■
The Center for Epidemiologic Studies of Depression Scale (CES-D) was designed to measure current level . . . Read More
MMPI-2 at psychology-glossary.com■■■■
MMPI-2 is defined as a measure of Psychopathology that was developed using the empirical criterion keying . . . Read More
Discrimination index at psychology-glossary.com■■■■
Discrimination index: Discrimination index is an index that indicates the extent to which pupils who . . . Read More
Principle of componential recovery at psychology-glossary.com■■■■
Principle of componential recovery refers to a principle of the recognition-by-components model that . . . Read More
Predictive validity at psychology-glossary.com■■■■
Predictive validity is the xtent to which a measure accurately forecasts how a person will think, act, . . . Read More
Item analysis at psychology-glossary.com■■■
Item analysis refers to an assessment of whether each of the items included in a composite measure makes . . . Read More