Regression
Encyclopedia
Regression could refer to:
- Regression (psychology)Regression (psychology)Regression, according to psychoanalyst Sigmund Freud, is a defense mechanism leading to the temporary or long-term reversion of the ego to an earlier stage of development rather than handling unacceptable impulses in a more adult way...
, a defensive reaction to some unaccepted impulses - Regression analysisRegression analysisIn statistics, regression analysis includes many techniques for modeling and analyzing several variables, when the focus is on the relationship between a dependent variable and one or more independent variables...
, a statistical technique for estimating the relationships among variables. There are several types of regression:- Linear regression model
- Simple linear regressionSimple linear regressionIn statistics, simple linear regression is the least squares estimator of a linear regression model with a single explanatory variable. In other words, simple linear regression fits a straight line through the set of n points in such a way that makes the sum of squared residuals of the model as...
- Logistic regressionLogistic regressionIn statistics, logistic regression is used for prediction of the probability of occurrence of an event by fitting data to a logit function logistic curve. It is a generalized linear model used for binomial regression...
- Nonlinear regressionNonlinear regressionIn statistics, nonlinear regression is a form of regression analysis in which observational data are modeled by a function which is a nonlinear combination of the model parameters and depends on one or more independent variables...
- Nonparametric regressionNonparametric regressionNonparametric regression is a form of regression analysis in which the predictor does not take a predetermined form but is constructed according to information derived from the data...
- Robust regressionRobust regressionIn robust statistics, robust regression is a form of regression analysis designed to circumvent some limitations of traditional parametric and non-parametric methods. Regression analysis seeks to find the effect of one or more independent variables upon a dependent variable...
- Stepwise regressionStepwise regressionIn statistics, stepwise regression includes regression models in which the choice of predictive variables is carried out by an automatic procedure...
- Regression toward the meanRegression toward the meanIn statistics, regression toward the mean is the phenomenon that if a variable is extreme on its first measurement, it will tend to be closer to the average on a second measurement, and—a fact that may superficially seem paradoxical—if it is extreme on a second measurement, will tend...
, a common statistical phenomenon - Curve fittingCurve fittingCurve fitting is the process of constructing a curve, or mathematical function, that has the best fit to a series of data points, possibly subject to constraints. Curve fitting can involve either interpolation, where an exact fit to the data is required, or smoothing, in which a "smooth" function...
, like Linear least squares - Software regressionSoftware regressionA software regression is a software bug which makes a feature stop functioning as intended after a certain event...
, the appearance of a bug which was absent in a previous revision - Regression testingRegression testingRegression testing is any type of software testing that seeks to uncover new errors, or regressions, in existing functionality after changes have been made to a system, such as functional enhancements, patches or configuration changes....
, a software testing method which seeks to uncover regression bugs - Infinite regressInfinite regressAn infinite regress in a series of propositions arises if the truth of proposition P1 requires the support of proposition P2, the truth of proposition P2 requires the support of proposition P3, .....
, a problem in epistemology - Marine regressionMarine regressionMarine regression is a geological process occurring when areas of submerged seafloor are exposed above the sea level. The opposite event, marine transgression, occurs when flooding from the sea covers previously exposed land....
, coastal advance due to falling sea level, the opposite of marine transgression - Regression (medicine)Regression (medicine)Regression in medicine is a characteristic of diseases to show lighter symptoms without completely disappearing. At a later point, symptoms may return. These symptoms are then called recidive....
, a characteristic of diseases to express lighter symptoms without disappearing totally - Age regression in therapyAge regression in therapyAge regression is an aspect of a number of psychotherapies: i.e., in hypnotherapy the term describes a process in which the patient returns to an earlier stage of life in order to explore a memory or to get in touch with some difficult-to-access aspect of their personality...
- Past life regressionPast life regressionPast life regression is a technique that uses hypnosis to recover what practitioners believe are memories of past lives or incarnations, though others regard them as fantasies or delusions. Past life regression is typically undertaken either in pursuit of a spiritual experience, or in a...
, a process claiming to retrieve memories of previous lives