Information processing models explain how our brains handle incoming data. These models break down memory into distinct systems, each playing a unique role in storing and retrieving information. Understanding these systems helps us grasp how we learn and remember things.
The Atkinson-Shiffrin model and levels of processing theory are key concepts. They show how information moves through different memory stages and how deep thinking leads to better retention. Dual-coding theory highlights the power of combining words and images for stronger memories.
Memory Systems
Sensory Memory and Short-Term Memory
- Sensory memory briefly holds sensory information (sights, sounds) for processing
- Iconic memory stores visual information for a few hundred milliseconds
- Echoic memory stores auditory information for a few seconds
- Short-term memory (STM) holds a limited amount of information for a short period
- STM capacity is around 7 ± 2 items (Miller's Law)
- Information in STM decays rapidly without rehearsal (18-20 seconds)
Working Memory and Long-Term Memory
- Working memory actively manipulates and processes information from STM and long-term memory (LTM)
- Central executive controls and coordinates information in working memory
- Phonological loop stores and rehearses verbal information (inner voice)
- Visuospatial sketchpad holds and manipulates visual and spatial information (mental images)
- Episodic buffer integrates information from various sources into a coherent episode
- Long-term memory (LTM) stores vast amounts of information for an extended period
- LTM has virtually unlimited capacity and duration
- Retrieval from LTM can be explicit (conscious) or implicit (unconscious)
Information Processing Models
Atkinson-Shiffrin Model and Levels of Processing
- Atkinson-Shiffrin model proposes three memory stores: sensory, short-term, and long-term
- Information flows from sensory memory to STM through attention
- Rehearsal in STM transfers information to LTM for permanent storage
- Levels of processing theory suggests memory depends on the depth of processing
- Shallow processing focuses on physical characteristics (font, sound)
- Deep processing involves semantic analysis and elaboration (meaning, associations)
- Deeper levels of processing lead to better retention and retrieval
Dual-Coding Theory
- Dual-coding theory proposes two separate systems for processing and storing information
- Verbal system processes and stores linguistic information (words, sentences)
- Nonverbal system processes and stores visual and spatial information (images, sensations)
- Information encoded in both systems (verbal and visual) is more easily remembered
- Combining words and images enhances learning and memory (multimedia presentations)
Cognitive Structures
Cognitive Architecture
- Cognitive architecture refers to the underlying structure and organization of the mind
- Includes memory systems, processing units, and their interactions
- Modularity suggests the mind consists of specialized, domain-specific modules (language, face recognition)
- Connectionism proposes that mental processes emerge from the activation of interconnected neural networks
- Schemas are organized knowledge structures that guide perception, understanding, and memory
- Scripts are schemas for event sequences and appropriate behaviors (restaurant script)