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In psychology, discriminant validity tests whether concepts or measurements that are not supposed to be related are actually unrelated. Campbell and Fiske (1959) introduced the concept of discriminant validity within their discussion on evaluating test validity.
Psychological statistics is application of formulas, theorems, numbers and laws to psychology. Statistical methods for psychology include development and application statistical theory and methods for modeling psychological data. These methods include psychometrics, factor analysis, experimental designs, and Bayesian statistics. The article ...
Statistical discrimination may refer to: Statistical discrimination (economics) Linear discriminant analysis (statistics) This page was last edited on 30 ...
Discrimination can also occur on group variances in the signals (i.e. in how noisy the signal is), even assuming equal averages. For variance-based discrimination to occur, the decision maker needs to be risk averse; such a decision maker will prefer the group with the lower variance. [8]
A psychometric function is an inferential psychometric model applied in detection and discrimination tasks. It models the relationship between a given feature of a physical stimulus , e.g. velocity, duration, brightness, weight etc., and forced-choice responses of a human or animal test subject.
As an example, in a two dimensional problem, the line that best divides the two groups is perpendicular to . Generally, the data points to be discriminated are projected onto ; then the threshold that best separates the data is chosen from analysis of the one-dimensional distribution. There is no general rule for the threshold.
The item-total correlation provides an index of the discrimination or differentiating power of the item, and is typically referred to as item discrimination. In addition, these statistics are calculated for each response of the oft-used multiple choice item, which are used to evaluate items and diagnose possible issues, such as a confusing ...
Examples include the Cambodian genocide, the Final Solution in Nazi Germany, the Rwandan genocide, the Armenian genocide, and the genocide of the Hellenes. This scale should not be confused with the Religious Orientation Scale of Allport and Ross (1967), which is a measure of the maturity of an individual's religious conviction.