Ergodic

Displayingthe characteristic that models derived from inter-individual studies areasymptotically identical to those derived from the same models at anintra-individual level.  In essence, a process where cross-sectional,longitudinal, and time-series models will all show the same results.  Astochastic Gaussian model, like most GLM-based models, will meet the criteriafor ergodicity if it is acyclic and stationary, such that …

Equilibrium

in Piagetian theory, the state that exists when assimilation and accommodation are in balance, or when cognitive structures and processes are successful in assimilating objects of action.  See Accommodation, Assimilation, Equilibration

Equifinality

A longstanding and important concept in biology emphasizing that open systems have the capability of attaining the same end state of equilibrium despite differences in initial conditions and the developmental routes taken.  Put it another way, there are ‘different means to the same end state’, which captures the many-to-one transformations between all possible initial states …

Equilibration

In Piagetian theory, the process by which a balance is achieved and then maintained (equilibrium) between assimilation and accommodation.  It endeavors to describe the role of self-regulation in the process of cognitive development.  When attempts to assimilate an object to a scheme are out of balance with attempts to accommodate a scheme to an object, …

Epithelium

Membranous tissue covering internal organs and other internal surfaces and external surfaces of the body, including the lining of vessels and other small cavities that is of ectodermal and entoderm origin.  For the lining of the capillaries and air sacs, it is called squamous epithelium.  For the linings of the ducts in glands, the airways, …

Epithalamus

A dorsal posterior segment of the diencephalon incorporating the habenula (a strap-like connection from the pineal gland to the diencephalon adjacent to posterior end of the roof of the third ventricle), the stria medullar is (a connection from the anterior region of the thalamus and the pineal body), and the pineal body, which connects the …

Episodic event and semantic memory

A distinction introduced by Endel Tulving, both are classes of declarative memory.  Episodic memory refers to a type of long-term memory for personal events or experiences that is stored as information to provide a sense of personal continuity and familiarity with the past.  It can be distinguished from semantic memory (a type of long-term memory …