A phenomenon whereby a change in the behavior of a subject being studied is an effect of the change itself or the fact of being observed rather than the nature of the change in question.

(psychology) The effect of the subjectivity of perception on recollection, by which observers of an event are able to produce substantially different but equally plausible accounts of it.

(chemistry) an experimentally observable effect of the transmission of charge through a chain of atoms in a molecule by electrostatic induction

(idiomatic) used to indicate a paraphrase or the chance of an error in the details of reported speech.

The effect of seeing hallucinatory images of a repetitive activity done earlier.

An auditory phenomenon in which pulsed microwave frequencies generate clicking sounds directly inside the human head.

plural of eureka effect

To implement; to execute; to carry out.

The continuous worldwide increase in average scores on intelligence tests.

plural of skin effect