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Chapter Summary: Cognition

Overview of Cognition

  • Definition: Cognition involves the scientific study of behavior and mental processes in human and nonhuman animals, including thinking, perception, memory, attention, reasoning, language, and problem solving.

  • Cognitive Psychologists: Examine diverse mental processes of thinking.

  • Cognitive Neuroscientists: Explore neural processes and brain regions associated with cognition.

Four Focus Areas in Cognitive Research

  1. Memory: The process of retaining information through encoding, storage, and retrieval.

  2. Language: The system of symbols used for communication.

  3. Thinking: Involves reasoning, problem-solving, and mental imagery.

  4. Problem Solving: The mental process of finding solutions to complex situations.

1. Memory

Memory Processes

  • Encoding: Combining and organizing incoming information to store it.

  • Storage: Maintaining encoded information over time.

  • Retrieval: Recovering stored information for use.

Information Processing Model (Atkinson and Shiffrin)

  • Stages:

    • Sensory Memory: Initial, fleeting recording of sensory information.

    • Short-Term Memory (Working Memory): Actively holds and processes information for a short period (10-30 seconds).

    • Long-Term Memory: Permanent storage with potentially limitless capacity.

Types of Memory

  • Sensory Memory: Brief retention of sensory input (iconic for visuals, echoic for sound).

  • Short-Term Memory: Holds information temporarily; 7 items plus or minus 2 is the typical limit (Miller's Law).

  • Long-Term Memory: Further categorized into explicit (declarative: semantic and episodic) and implicit (non-declarative: procedural, priming, conditioned reflexes).

Encoding Methods

  • Automatic vs. Effortful Processing: Automatic processing requires little effort; effortful processing involves conscious attention.

  • Types of Encoding: Visual, acoustic, semantic (deepest processing).

  • Elaborative Rehearsal: Involves making connections with existing knowledge, enhancing retention.

Self-Reference Effect

  • Tendency to remember information better when it is personally relevant or connected to the self.

Forgetting and Retrieval Failure

  • Forgetting: Can occur due to decay over time or retrieval failure (e.g., tip-of-the-tongue phenomenon).

  • Serial Position Effect: Items at the start (primacy effect) and end (recency effect) of a list are remembered best.

2. Language

Language Definition

  • Language: A system of symbols for communication, encompassing spoken and sign languages.

Components of Language

  1. Phonemes: Smallest units of sound (English has about 45).

  2. Morphemes: Smallest units of meaning (e.g., prefixes, roots).

  3. Grammar: Includes semantics (meaning) and syntax (rules governing word order).

Language Acquisition Stages

  • Babbling: Early sounds made by infants (4-6 months).

  • One-Word Stage: Communication using single words (10-18 months).

  • Two-Word Stage: Simple phrases (18-24 months).

  • Telegraphic Speech: Early multi-word sentences containing only essential words.

Language Development Theories

  • Behaviorist Perspective (B.F. Skinner): Language is learned through imitation and reinforcement.

  • Nativist Approach (Noam Chomsky): Emphasizes innate ability and universal grammar.

3. Thinking

Cognitive Processing

  • Types of Thinking: Involves mental processes such as reasoning, problem-solving, and planning.

  • Mental Images & Concepts: Used to categorize, remember, and solve problems efficiently.

Problem Solving Strategies

  • Insight: Sudden realization of a solution.

  • Trial and Error: Random guesses, effective for small problem sets but inefficient for larger ones.

  • Algorithms vs. Heuristics:

    • Algorithms: Step-by-step procedures that guarantee a solution.

    • Heuristics: Mental shortcuts for quicker, though less accurate solutions.

Common Errors in Problem Solving

  • Confirmation Bias: Focusing only on information that supports existing beliefs.

  • Belief Perseverance: Holding onto beliefs despite contradictory evidence.

  • Anchoring Bias and Framing Effect: Relying heavily on initial information or the way a problem is presented, respectively.

4. Memory Construction and Forgetting

Accuracy of Memory

  • Problems with eyewitness recall have significant implications for justice.

  • Confabulation: False memories can emerge from suggestion.

Theories of Forgetting

  • Decay Theory: Memories fade over time if not retrieved.

  • Interference Theory: Conflicting memories hinder retrieval.

Brain Damage and Memory

  • Alzheimer's Disease: Ruins memory due to neuron deterioration.

  • Types of amnesia:

    • Retrograde Amnesia: Forgetting prior events.

    • Anterograde Amnesia: Inability to form new memories after the incident.

5. Memory Improvement Techniques

Mnemonic Strategies

  • Method of Loci: Associating items to remember with locations in a familiar space.

  • Peg-Word System: Linking items to a memorized list of words connected to numbers.

Summary

  • Cognitive psychology encompasses the vast understanding of mental processes, focusing on the interrelations and functions of memory, language, thinking, and problem-solving.