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A correlation coefficient is a numerical measure of some type of linear correlation, meaning a statistical relationship between two variables. [ a ] The variables may be two columns of a given data set of observations, often called a sample , or two components of a multivariate random variable with a known distribution .
In psychology, association can sometimes be synonymous with correlation. When something is referred to as having positive association or positive correlation, it describes high or low levels of one variable happen with high or low levels of another variable.
The correlation coefficient is +1 in the case of a perfect direct (increasing) linear relationship (correlation), −1 in the case of a perfect inverse (decreasing) linear relationship (anti-correlation), [5] and some value in the open interval (,) in all other cases, indicating the degree of linear dependence between the variables. As it ...
The item–total correlation is the correlation between a scored item and the total test score. It is an item statistic used in psychometric analysis to diagnose assessment items that fail to indicate the underlying psychological trait so that they can be removed or revised.
The coefficient of multiple correlation is known as the square root of the coefficient of determination, but under the particular assumptions that an intercept is included and that the best possible linear predictors are used, whereas the coefficient of determination is defined for more general cases, including those of nonlinear prediction and those in which the predicted values have not been ...
Research has found a strong correlation between high self-esteem and self-reported happiness, but it is not yet known whether this relationship is causal. This means that although people with high self-esteem tend to report greater happiness, it is not certain whether having high self-esteem directly causes increased happiness. [ 6 ]
Pages for logged out editors learn more. Contributions; Talk; Positive correlation
In social psychology, reciprocity is a social norm of responding to an action executed by another person with a similar or equivalent action. This typically results in rewarding positive actions and punishing negative ones. [1] As a social construct, reciprocity means that in response to friendly actions, people are generally nicer and more ...