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Related Concept Videos

Forgetting01:21

Forgetting

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Forgetting is an intrinsic aspect of human memory, characterized by the gradual loss or inaccessibility of information over time. Hermann Ebbinghaus, a pioneering psychologist, extensively studied this phenomenon and formulated the forgetting curve. This curve illustrates that memory loss occurs rapidly immediately after learning and then decelerates over time. Several mechanisms contribute to forgetting, including encoding failure, storage decay, retrieval failure, and interference.
Encoding...
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Interference and Decay01:16

Interference and Decay

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Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
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The similarity-dissimilarity effect, a fundamental concept in social psychology, explains how interpersonal similarities and differences influence attraction and social interactions. This effect is supported by three key psychological perspectives: balance theory, social comparison theory, and consensual validation.Balance Theory and Cognitive ConsistencyBalance theory, developed by Fritz Heider, posits that individuals seek cognitive consistency in their relationships. When two people share...
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Serial Position Effect01:03

Serial Position Effect

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The serial position effect is a cognitive phenomenon where individuals are more likely to recall the first and last items in a list compared to those in the middle. This effect is divided into the primacy effect and the recency effect. The primacy effect is observed when the initial items in a list are remembered better. This occurs because these items are rehearsed more frequently or receive more elaborative processing, allowing them to be encoded into long-term memory more effectively. For...
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Tip-of-the-Tongue Phenomenon01:10

Tip-of-the-Tongue Phenomenon

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The tip-of-the-tongue (TOT) phenomenon is a cognitive experience characterized by a temporary inability to retrieve specific information from memory despite having a strong feeling of knowing the information. Although individuals cannot access the target word or detail, they frequently recall related elements, such as its initial letter, syllable count, or context. This partial retrieval often causes frustration, as one might recognize a familiar face or know that a name starts with a specific...
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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.
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Related Experiment Video

Updated: May 6, 2026

Combining Behavior and EEG to Study the Effects of Mindfulness Meditation on Episodic Memory
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A comparison of item and source forgetting.

B H Bornstein1, D C Lecompte

  • 1Department of Psychology, Louisiana State University, 236 Audubon Hall, 70803, Baton Rouge, LA, psbrian@lsuvm.sncc.lsu.edu.

Psychonomic Bulletin & Review
|November 9, 2013
PubMed
Summary

This study compared memory for items versus memory for their sources. Researchers found that both item memory and source memory decline at the same rate over time.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • Distinguishing between item memory and source memory is crucial for understanding cognitive processes.
  • Previous research suggested differential forgetting rates for item and source information.
  • Source monitoring involves evaluating the origins of memories, whether internal or external.

Purpose of the Study:

  • To compare the forgetting rates of item memory versus source memory.
  • To investigate discrimination between external sources (e.g., voice gender).
  • To examine reality monitoring, differentiating internal from external memory sources.

Main Methods:

  • Experiment 1: Word lists spoken in male/female voices, followed by item recognition and source monitoring tests at various delays.

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  • Experiment 2: Replicated Experiment 1 with an added reality monitoring condition (internal vs. external sources).
  • Utilized delay intervals including immediate, 30 minutes, 48 hours, and 1 week.

    • Main Results:

    • No evidence of differential forgetting rates between item and source information in Experiment 1.
    • Subjects showed better performance in discriminating internal from external sources compared to external-external discriminations.
    • Both item recognition and source monitoring abilities declined at comparable rates over time.

    Conclusions:

    • Item memory and source memory appear to follow similar forgetting trajectories.
    • Reality monitoring (internal vs. external) is distinguishable but also declines in parallel with item memory.
    • Findings challenge previous notions of differential forgetting rates for different memory components.