JL

PSYCH 10.17

The Seven Sins of Memory

  • Overview of the seven sins of memory that distort recalling past events.

  • Previous sins discussed: Transience and Blocking.

  • Current focus: Bias.

Stereotypical Bias

  • Definition: Stereotypical bias refers to how one's feelings and views can distort memory recall, particularly concerning race, gender, and ethnicity.

  • Example: Studies have shown that typical African American names are often inaccurately remembered as being associated with basketball players, while typical white names are more frequently linked to politicians.

Egocentric Bias

  • Definition: Egocentric bias is the tendency to enhance and distort memories of past events to make oneself look better.

  • Explanation: This bias protects one's fragile ego; individuals recall events in ways that favor their self-image.

Hindsight Bias

  • Definition: Hindsight bias is the inclination to view outcomes as inevitable after they have occurred, leading one to believe they "knew it all along."

  • Example: Captain Hindsight from South Park is a fictional representation of this bias, showcasing the tendency to believe one could predict the outcome retrospectively.

Persistence Bias

  • Explanation: Persistence involves the repeated recall of unwanted memories, often discussed within the context of repression.

  • Relevant observation: Veterans of military conflicts may frequently and uncontrollably remember traumatic experiences, indicating a struggle against persistence.

Failure to Retrieve Information

  • Not all forgetting is due to memory decay; sometimes it stems from failure to retrieve information.

  • Types of Interference:

    • Proactive Interference: Old information obstructs the recall of new information.

    • Example: Remembering the combination of a high school locker can interfere with recalling the combination for a new gym locker.

    • Real-life relevance: Times when studying feels ineffective (like sounding out as "Charlie Brown's teacher") can signal proactive interference.

    • Retroactive Interference: New information hinders the recall of older information.

    • Example: A new email address may interfere with the memory of an older one.

Managing Proactive Interference

  • Release from Proactive Interference: To alleviate proactive interference, switching topics can help.

    • Study example (Ericsson's research in the 1980s): Participants memorized three lists of professionals with decreasing recall due to proactive interference. A switch to a different category (e.g., fruits) improved recall.

  • Study Strategy: Utilizing a range of topics in study sessions can prevent interference. Recommended study blocks

    • Optimal length: 45-75 minutes.

Memory Enhancement Strategies

  • Rehearsal: Defined as the conscious repetition of material to be remembered. Although time-consuming, it is a foundational strategy.

  • Chunking: Breaking down information into manageable sizes to enhance comprehension and recall.

    • Example: Remembering a nine-digit Social Security number requires chunking into smaller sets.

  • Elaborative Rehearsal: Engage with the meaning of new information, linking it to previously stored information. Creating associations enhances retention.

    • Example: Using mnemonic devices to remember sequences (e.g., the knuckle method for months with 31 days).

Application of Learning Techniques

  • Use semantic encoding to strengthen memory.

  • Generate personal examples to improve retention, despite initial skepticism about their effectiveness.

  • Awareness of memory decay over time, as demonstrated through Ebbinghaus's experiments.

    • Notably, 70% of learned information is forgotten within 24 hours if not reinforced or overlearned.

  • Better approach: Consistent spaced learning (1 hour daily versus 6 hours in one day).

Strategies Against Interference

  • Reduce distractions (social media, TV) while studying.

  • Real-life findings: Multitasking, like checking social media while studying, can reduce study efficiency significantly (up to a 20-minute recovery time).

  • Importance of physical exercise in managing stress and maintaining cognitive performance. Simple activities, like brisk walking, can effectively reduce cortisol levels.

  • Prioritize sleep, which is crucial for memory consolidation, choosing it over additional study time. The brain consolidates memories primarily during sleep.

Mnemonic Devices and Learning Techniques

  • Use mnemonic devices actively to assist in remembering complex information.

  • Reviewed ineffective study practices (e.g., rereading, highlighting) that yield low utility.

  • Highlighted effective study techniques:

    • Distributed practice: Spread out studying rather than cramming.

    • Self-explaining: Teaching material to peers helps reinforce understanding.

    • Testing effect: Actively recalling information strengthens learning more than passive reading.

The Total Time Hypothesis

  • Learning retention correlates with the total time spent on studies.

  • Ebbinghaus showed more time spent initially correlates with less time needed subsequently.

Encoding Specificity

  • Key principle: Study in conditions congruent with recall contexts for improved memory retention.

    • Mentioned research by Alan Baddeley's study involving divers; congruence between encoding and recall locations produced higher recall rates.

  • State-dependent learning also emphasized; matching emotional or mental states between learning and recalling improves outcomes.

Background Media Impact

  • Background media can significantly distract and impair learning. Research demonstrated that participants' attention was drawn more towards distracting media than they realized during study tasks.