Endogenously (Greek internally created) means that something is formed from internal reasons or from the inside of a system works out inward or outward. The opposite is exogenous. These terms are used in various sciences using:
- In botany endogenous plant parts are those parts of a plant that does not arise from tissue layers at the surface of the plant out, but in the interior of the plant. During their growth, they then pierce the outer ( exogenous ) tissue layers.
- The geology also names endogenous processes, ie processes that are created by internal forces such as tension and heat within the earth.
- The medicine speaks of endogenous substances, diseases or pathogens when they arise in the interior of the living.
- In psychiatry represent the endogenous psychoses systematic collective term is for diseases that are less caused by external factors than by internal constitution.
- The psychology speaks of endogenous factors or processes as they emerge from the psychological predisposition of an individual out.
- In sociology, there is a characterization of social change as an intra- societal causes ( contrast: exogenous social change by action of other companies )
- In statistics denote endogenous variables such factors whose expression is to be explained or predicted in a causal or structural equation model.
- In economics variables are called endogenous if they represent a dependent variable in a model. Their value is thus obtained as a result of the model structure and the exogenous variables of the model. See also endogeneity and Endogenitätstest, Endogenous variables, Hausman test, regression discontinuity analysis, linear panel data models and instrument variable.