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n. the hypothetical memory trace that is stored in the brain. The nature of the engram, in terms of the exact physiological changes that occur to encode a memory, is as yet unknown. The term was introduced by German biologist Richard Semon (1859–1918) in the early 1900s and was popularized by Karl S. Lashley in his 1950 paper “In Search of the Engram.” Also called mneme; mnemonic trace; neurogram.

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Psychology term of the day

February 26th 2024




1. an error in reasoning or argument that leads to a conclusion that may appear valid but is actually invalid. A fallacy may be formal or informal. A formal fallacy involves a violation of a principle of formal logic. An informal fallacy leads to an invalid conclusion because it is misleading in its language or appears to apply to a situation when it does not really apply. See also either–or fallacy; false analogy; false authority; false cause; historical fallacy.

2. more generally, any mistaken idea. —fallacious adj.