Regression

Regression or regressions may refer to:

• Regression (film), a 2015 horror film by Alejandro Amenábar, starring Ethan Hawke and Emma Watson
• Regression (magazine), an Australian punk rock fanzine (1982–1984)
• Regressions (album), 2010 album by Cleric

• 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

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

• 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

• 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

• Infinite regress, a problem in epistemology
• Regress (disambiguation)