---
id: kb-2026-00489
title: Human Memory
schema_type: TechArticle
category: science
language: en
confidence: medium
last_verified: "2026-05-28"
created_date: "2026-05-22"
generation_method: ai_assisted
ai_models:
  - claude-opus
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-science-001
    statement: >-
      Schacter described seven common categories of memory error, including transience, absent-mindedness, blocking,
      misattribution, suggestibility, bias, and persistence.
    source_title: "The Seven Sins of Memory: Insights from Psychology and Cognitive Neuroscience"
    source_url: https://doi.org/10.1037/0003-066X.54.3.182
    confidence: medium
  - id: fact-science-002
    statement: >-
      Cowan argued that short-term memory capacity is often closer to about four chunks than to the older seven-item
      estimate.
    source_title: "The magical number 4 in short-term memory: A reconsideration of mental storage capacity"
    source_url: https://doi.org/10.1017/S0140525X01003922
    confidence: medium
  - id: fact-science-003
    statement: Baddeley described working memory as a system for temporary storage and manipulation of information.
    source_title: Working memory
    source_url: https://doi.org/10.1126/science.1736359
    confidence: medium
completeness: 0.88
known_gaps:
  - Neural mechanisms of consolidation and reconsolidation
  - Differences among laboratory memory tasks, eyewitness memory, and everyday memory
disputed_statements: []
primary_sources:
  - title: "The Seven Sins of Memory: Insights from Psychology and Cognitive Neuroscience"
    type: journal_article
    year: 1999
    institution: American Psychologist
    url: https://doi.org/10.1037/0003-066X.54.3.182
  - title: "The magical number 4 in short-term memory: A reconsideration of mental storage capacity"
    type: journal_article
    year: 2001
    institution: Behavioral and Brain Sciences
    url: https://doi.org/10.1017/S0140525X01003922
  - title: Working memory
    type: journal_article
    year: 1992
    institution: Science
    url: https://doi.org/10.1126/science.1736359
secondary_sources: []
updated: "2026-05-28"
---
## TL;DR
Human memory is an active set of systems for encoding, storing, reconstructing, and using information. It is useful but fallible, and different memory tasks rely on different mechanisms.

## Core Explanation
Working memory supports temporary storage and manipulation. Long-term memory includes different forms such as episodic, semantic, and procedural memory. Memory errors can arise from forgetting, misattribution, suggestion, bias, blocking, and persistence.

## Detailed Analysis
Memory should not be described as a perfect recording device. Research on working memory capacity, memory errors, and reconstructive processes shows why confidence, vividness, and accuracy can diverge.

## Further Reading
- Schacter on the seven sins of memory
- Cowan on short-term memory capacity
- Baddeley on working memory

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