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Related Concept Videos

False Memories01:18

False Memories

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False memories represent a cognitive distortion in which individuals recall events that did not happen, or remember them in an altered form. This phenomenon highlights the brain's constructive nature in processing and recalling memories, emphasizing that memory is not a perfect representation of past events but rather a dynamic reconstruction influenced by various factors.
One primary source of false memories is misattribution, where individuals incorrectly associate external information...
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Dissociative disorders represent complex psychological conditions characterized by disruptions in consciousness, memory, identity, or perception. These disruptions cause individuals to experience a disconnection from their thoughts, emotions, and memories. The phenomenon is not merely an occasional lapse in attention but a profound alteration in mental functioning that can severely impact daily life.
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Repressed Memory01:16

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Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...
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Dissociative Identity Disorder01:30

Dissociative Identity Disorder

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Dissociative Identity Disorder (DID), previously termed multiple personality disorder, is a complex psychological condition characterized by the presence of two or more distinct identities or personality states. Each identity exhibits unique patterns of behavior, voice, and mannerisms and may possess separate memories and emotional responses. The alternating control between identities can result in memory gaps and challenges in recalling daily activities, often exacerbating the individual's...
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Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...
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Traumatic Memory01:20

Traumatic Memory

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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Updated: Nov 8, 2025

The Deese-Roediger-McDermott DRM Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
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Deep memory distortions.

C J Brainerd1

  • 1Human Neuroscience Institute and Department of Psychology, Cornell University, United States.

Cognitive Psychology
|April 22, 2021
PubMed
Summary
This summary is machine-generated.

Deep distortions, a new type of false memory, emerge from multiple memories and violate logical rules. These memory biases reveal that our recall overestimates experiences and misrepresents reality.

Keywords:
Deep distortionsFuzzy-trace theoryImpossible conjunctionsNon-additivityOverdistributionSuper-overdistribution

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Area of Science:

  • Cognitive Psychology
  • Memory Studies
  • Cognitive Neuroscience

Background:

  • False memories are categorized into surface and deep distortions.
  • Surface distortions involve erroneous specific item or source memories.
  • Deep distortions represent emergent properties of multiple memories, violating logical rules.

Purpose of the Study:

  • Introduce and define deep distortions as a novel category of memory bias.
  • Discuss four types of deep distortions: overdistribution, super-overdistribution, non-additivity, and impossible conjunctions.
  • Explore the psychological significance and theoretical implications of deep distortions.

Main Methods:

  • Review existing data on four specific deep distortions.
  • Analyze how these distortions violate axioms of classical probability and derived rules.
  • Examine the relationship between deep distortions and surface distortions.

Main Results:

  • Deep distortions violate fundamental probability axioms (numerical bound, universal event, additivity, countable additivity) and rules (empty set, monotonicity).
  • Memory is compensatory, unlike real-world events, leading to overestimation of experiences.
  • Surface distortions are identified as by-products of deep distortions.

Conclusions:

  • Deep distortions represent a significant class of memory biases with profound implications for understanding memory.
  • Memory's structure can fundamentally misrepresent the objective structure of experienced events.
  • Further research is needed to address the theoretical conundrum of memory's representational inaccuracies.