Memory Chapter 7
Memory Chapter 7
What is Memory?
Definition: Memory refers to the retention of information and experiences, which can occur:
Consciously: Examples include mental time travel, where one reflects on past experiences.
Unconsciously: For instance, priming, which sets up associations such that exposure to one stimulus (e.g., "cat") influences the response to another stimulus (e.g., "dog").
Phases of Memory: Memory is generally divided into three phases:
Encoding: The process of transforming and processing information for storage.
Storage: Maintaining the encoded information over time.
Retrieval: Accessing and bringing stored information to consciousness.
Overview of Memory Processes
Key questions regarding memory include:
How do we encode memories?
How is memory structured?
How do we retrieve memories?
Why do we experience false memories?
Encoding Memories
Factors Affecting Encoding:
The manner in which individuals study affects encoding, classified into:
Effortful Encoding: Requires deliberate mental effort and attention.
Automatic Encoding: Occurs subconsciously without deliberate mental effort.
Attention and Memory:
Sustained Attention: Focusing on a task over time is crucial for effective memory encoding.
Divided Attention: Concurrent task engagement can link negatively to memory encoding capabilities.
Levels-of-Processing Framework (Craik & Lockhart, 1972)
Proposes that memory retention is influenced by the depth of processing:
Deep Processing: Engaging with material meaningfully, thus improving recall.
Shallow Processing: Involves focusing on superficial elements, leading to weaker recall.
Continuum of Processing: Ranges from shallow processing to deep processing, with greater depth correlating to better recall.
Distinctiveness in Memory
Concept of Distinctiveness:
Distinctiveness refers to identifying differences in contexts filled with similarities.
Distinctive information is generally easier to remember, enhancing recall efficacy.
Von Restorff Effect (1933)
Illustration: In a sequence of letters (P L K O T C M S), distinctive letters or features are easier to recall due to the von Restorff effect. This can be illustrated by presenting sequences and asking participants to recall distinctive letters.
Negative Aspects:
Adjacent letters can cause interference in recall, as distinctiveness can also introduce costs (McDaniel et al., 2011).
Good Encoding Tasks
Effective encoding promotes elaboration, such as making connections with other information:
Implicit versus Explicit memory distinctions.
Encouragement to think of self-related examples enhances memory formation.
Examples
Successful mnemonic methods utilized by memory champions, such as Ben Pridmore and Nelson Dellis.
Method of Loci
Definition: A mnemonic device using visual imagery to aid memorization by associating information with specific locations in a familiar visual space.
Key Techniques:
Creating vivid mental images and assigning these images to defined locations.
Mentally retracing steps for enhanced recall.
Example Items: Scissors, Monkey, Soccer Ball, Trumpet, Tank, Bicycle are items that can be mentally placed along the loci pathways for easier retrieval during recall.
Current World Records in Memory Competitions
Events and Records:
Speed cards: 21.19 seconds held by Simon Reinhard.
Forward digits: 300 digits by Wang Feng (1 second).
Written numbers: 2660 digits by Wang Feng (1 hour).
Random words: 114 in order by Boris Konrad (5 minutes) and 300 in order by Simon Reinhard (15 minutes).
Testing in Memory Retrieval
Participants engage in memory tasks such as recalling lists of words (guilty, can, backpack, chair) and prompts for recall like first letters or direct copies.
Rowland's Meta Analysis (2014): Conducted a meta-analysis comparing restudy versus retrieval methods across 159 studies, indicating that participants were 2.5 times more likely to recall information after engaging in practice quizzes.
Practice Testing Efforts
Value of Practice Testing: Found to be even more beneficial with delays—free recall and short answer tests are preferable across exam formats, aiding retention.
Resistance to Distractions: Practice testing proves advantageous in assessing knowledge amidst potential distractions.
Spacing Effect in Study Patterns
Between Session Spacing: Proper timing of encoding can significantly impact recall capabilities.
Study patterns assessed include three 1-hour sessions versus a single three-hour session, and the implications for memory retention on a test.
Within-Session Spacing: Learning patterns such as grouping information (AAABBBCCCDDD vs. ABCDABCDABCD) can differ in effectiveness.
Improving Study Techniques
Suggestion to regularly test oneself and distribute studies across the week and varied concepts over a session for improved retention outcomes.
Sensory Memory
Characteristics: This type of memory holds newly acquired sensory information temporarily; it's rich yet short-lived.
Echoic Memory: Auditory sensory memory lasting several seconds.
Iconic Memory: Visual sensory memory lasting approximately 0.25 to 0.5 seconds.
Sperling's Study (1960): Highlights limitations in sensory memory: participants could typically remember 4-5 letters presented for just 1/20th of a second.
Sperling's Experiment Extended
Format involved presenting tones after displaying letter sequences, and results indicated improved recall due to cues directing focus on specific rows.
The Atkinson-Shiffrin Model (1968)
This memory model illustrates three stages:
Sensory Memory: Initial brief storage of sensory input.
Short-Term Memory (STM): Limited storage (~20-30 seconds without rehearsal); noted by Miller's Law (1956): humans can retain 7 ± 2 units.
Unit Concept: Practical applications of chunking increase capacity (e.g., arranging letters into meaningful phrases).
Long-Term Memory (LTM): Characterized by relatively permanent storage following sufficient processing from STM.
Working Memory vs. Short-Term Memory
Definition: Working memory encompasses short-term retention alongside active attention control (Kane & Engle, 2001).
Baddeley's Working Memory Model (1974): Describes components such as the Central Executive, Phonological Loop, and Visuo-Spatial Sketchpad, which coordinate attention control and information processing.
Implicit Memory Types
Characteristics: Unconscious memories such as classical conditioning and procedural memories.
Priming Examples: Activating concepts unconsciously, as demonstrated in semantic priming studies (Meyer & Schvaneveldt, 1971).
Explicit Memory Components
Definition: Involves conscious recollection of facts and events.
Episodic Memory: Relates to specific context (where, when, what of the past).
Semantic Memory: Covers general knowledge, trivia, and concepts.
Organization of Memory
Schemas: Mental frameworks constructed from experiences that dictate expectations in various settings.
Scripts: Details concerning a common experience are established (for example, expectations in a movie theater).
Memory Retrieval Mechanisms
Definitions:
Recall: Act of retrieving previously learned information without cues.
Recognition: Identifying previously encountered content.
Retrieval Issues
Retrieval is often cue-dependent, as seen in situations where one knows information upon receiving certain cues.
Encoding-Specificity Principle (Tulving & Thomson, 1972)
Suggests that better retrieval occurs when the cues at the time of recall match the method used during encoding. Example: determining the nature of study questions influences later recall effectiveness.
Context-Dependent Memory (Tulving & Thomson, 1972)
Memory is enhanced when the study environment coincides with the testing context, as evidenced in research by Godden & Baddeley (1975).
Flashbulb Memories
Definition: Memories related to profoundly emotional events, both traumatic and personally significant, where individuals exhibit high confidence in recall accuracy.
Reconstructive Nature of Memory (Bartlett, 1932)
Bartlett's Study: Explored how stories change over time; memory is affected by losing specifics, details, and leaning toward cultural consistency over repeated retellings.
Misinformation Effect (Loftus, Miller, & Burns, 1978)
Demonstrated how misleading information could alter memories through questioning techniques, significantly impacting recall accuracy based on the phrasing used in questions about incidents.
Source Memory
Definition: The ability to recall the source of a memory can be compromised, leading to false recognition (Garry & Pollaschek, 2000).
Forgetting Mechanisms
Forgetting: Viewed as an inherent aspect of memory, which can arise from decay, interference, or retrieval failures.
Types of Interference
Retroactive Interference: New information impairs older memories.
Proactive Interference: Older memories hinder recall of new information.
Wickens (1972) Study on Interference
Participants tasked with studying word lists experienced a “release from proactive interference” when switching categories between word lists, evidencing interference dynamics.
Amnesia Types
Definition: Amnesia denotes memory loss; can be categorized as follows:
Anterograde Amnesia: Inability to create new memories post-injury or event.
Retrograde Amnesia: Inability to recall pre-existing memories, which may be temporary or permanent.