Regression

Regression or regressions may refer to:

Science

 * Marine regression, coastal advance due to falling sea level, the opposite of marine transgression
 * Regression (medicine), a characteristic of diseases to express lighter symptoms or less extent (mainly for tumors), without disappearing totally
 * Regression (psychology), a defensive reaction to some unaccepted impulses
 * Nodal regression, the movement of the nodes of an object in orbit, in the opposite direction to the motion of the object

Statistics

 * Regression analysis, a statistical technique for estimating the relationships among variables. There are several types of regression:
 * Linear regression
 * Simple linear regression
 * Logistic regression
 * Nonlinear regression
 * Nonparametric regression
 * Robust regression
 * Stepwise regression
 * Regression toward the mean, a common statistical phenomenon

Computing

 * Software regression, the appearance of a bug in functionality that was working correctly in a previous revision
 * Regression testing, a software testing method which seeks to uncover regression bugs

Hypnosis

 * Age regression in therapy, a process claiming to retrieve memories
 * Past life regression, a process claiming to retrieve memories of previous lives

Other uses

 * Infinite regress, a problem in epistemology
 * Regression (film), a 2015 horror film directed and written by Alejandro Amenábar, starring Ethan Hawke and Emma Watson
 * Regressions (album), 2010 album by Cleric