Freud's Psychoanalytic Theory and the Information Processing Model of Memory - 09/22
Sigmund Freud's Psychoanalytic Theory: Consciousness and Personality
Memory Origin: Freud posited that memory processing begins with our senses.
Three Layers of Consciousness:
Unconscious: This is conceptualized as a "holding cell" for unwanted and repressed thoughts, feelings, and impulses. It is entirely inaccessible to conscious awareness and can only be explored through methods like psychoanalysis. Key impulses residing here are often identified as sexual and aggressive drives.
Model of the Mind: The Iceberg Metaphor: Freud used the analogy of an iceberg to illustrate the structure of the mind:
Conscious Mind: The visible tip of the iceberg, representing everything we are currently aware of.
Preconscious Mind: Just below the surface, this level contains thoughts, memories, and information that are not currently in our awareness but can be easily retrieved and brought into consciousness (e.g., remembering a phone number).
Unconscious Mind: The vast bulk of the iceberg hidden below the water's surface, representing the inaccessible and primary reservoir of drives, instincts, and repressed memories that significantly influence behavior.
Components of Personality:
Id: The most primitive and instinctual part of the personality, operating entirely in the unconscious. It strives impulsively to satisfy basic sexual and aggressive drives, operating on the "pleasure principle" by demanding immediate gratification without regard for consequences.
Ego: Known as the "executive" part of the personality, the ego operates mostly in the conscious and preconscious. Its primary role is to mediate the conflicting demands of the impulsive Id, the moralistic Superego, and the external reality. It functions on the reality principle, seeking to gratify the Id's impulses in realistic ways that will bring long-term pleasure rather than pain.
Superego: Developed during childhood, the Superego represents internalized ideals and provides standards for judgment (the conscience) and future aspirations. It strives for perfection, serving as our moral compass.
Defense Mechanisms: Strategies employed by the Ego, often unconsciously, to protect the individual from anxiety arising from unacceptable thoughts or feelings. The Ego attempts to mediate the demands of the Id and Superego through these mechanisms.
Repression: An unconscious defense mechanism where anxiety-arousing thoughts, feelings, and memories are banished from consciousness. The individual is not aware of repressing these elements.
Regression: Retreating to an earlier, more infantile stage of development when confronted with stress or anxiety.
Suppression: A conscious act of actively and intentionally redirecting or pushing unwanted thoughts, feelings, or impulses out of awareness. The individual is aware that they are doing this.
Memory Research: Elizabeth Loftus and Information Processing
Elizabeth Loftus: A prominent researcher known for her extensive work on memory, particularly focusing on the nature of false memories. Her research demonstrates how easily memories can be inaccurate, altered, or even entirely planted by external suggestions or researchers.
Information Processing Model of Memory: This model proposes that memory operates through a sequence of stages, much like a computer processes information.
Sensory Memory: The initial, fleeting stage that holds raw sensory information very briefly.
Short-Term Memory (Working Memory): A temporary storage system that holds a limited amount of information for a short duration while it is being actively processed or used.
Long-Term Memory: The relatively permanent and limitless storehouse of the memory system, capable of holding vast amounts of information over extended periods.
Details of Sensory Memory
Sensory Register: The initial point where sensory information from the environment is first registered before it can be processed further.
Iconic Memory (Visual Sensory Memory):
A momentary sensory memory for visual stimuli. It captures a "full representation" of visual input, essentially a fleeting photographic memory of a scene.
Sperling's Partial Report Experiment: George Sperling's classic experiment demonstrated the nature of iconic memory:
Participants were briefly shown a grid of letters.
Full Report Condition: When asked to recall all letters, participants typically reported only around 3 or 4 items, even though they felt they saw more.
Partial Report Condition: When a tone was sounded after the grid disappeared, cuing participants to recall only specific rows, they could accurately report almost all letters in that cued row.
Key Findings: This indicated that our sensory register initially captures all visual information presented, but this iconic memory fades extremely rapidly (typically within 0.5 to 1 second) before it can be fully processed or transferred to short-term memory.
Echoic Memory (Auditory Sensory Memory):
A momentary sensory memory for auditory stimuli. Sounds or words can still be recalled within 3 or 4 seconds, even if attention is elsewhere. Echoic memory tends to last slightly longer than iconic memory.
Details of Short-Term Memory (Working Memory)
Capacity: Short-term memory has a limited capacity, often referred to as the "magical number seven, plus or minus two." This means it can typically store approximately 5 to 9 pieces of information at a time.
Expanding Capacity: Chunking:
Chunking is a memory strategy that involves organizing individual pieces of information into larger, more meaningful units or "chunks." This allows more information to be held in short-term memory by grouping individual items into a single, cohesive unit, effectively increasing the perceived capacity of short-term memory.