Regression

Regression could refer to:

• Regression (psychology), a defensive reaction to some unaccepted impulses
• Age regression in therapy
• Past life regression, a process claiming to retrieve memories of previous lives
• Regression (medicine), a characteristic of diseases to express lighter symptoms without disappearing totally

• Regression analysis, a statistical technique for estimating the relationships among variables. There are several types of regression:
  • Linear regression model
  • Simple linear regression
  • Logistic regression
  • Nonlinear regression
  • Nonparametric regression
  • Robust regression
  • Stepwise regression
• Regression toward the mean, a common statistical phenomenon
• Software regression, the appearance of a bug which was absent in a previous revision
• Regression testing, a software testing method which seeks to uncover regression bugs

• Regression (economics), Ludwig von Mises' theorem that tries to explain why money is demanded in its own right
• Infinite regress, a problem in epistemology
• Marine regression, coastal advance due to falling sea level, the opposite of marine transgression