‘Objectivity’ is an ambiguous term with many meanings, some of which do not even overlap. It refers to different kinds of entities and is used in various scientific disciplines. Even in psychological assessment, there are at least four different concepts of objectivity. The most important one is that of an evaluation criterion for psychological assessment instruments which stands on the same level as the two other criteria of reliability and validity. The generality of these criteria and their applicability to all assessment instruments beyond the more narrow class of psychological tests is an issue of much debate in psychological assessment.

Philosophical Notions of Objectivity

There are various notions of objectivity in philosophy. Gauker (1998) differentiates between the correspondence conception and the intersubjective conception of objectivity. The most ...

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