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History of CogSci

Resources

Important

  • Intentionality – The directedness of the mind toward objects or stimuli in the world, allowing the mind to actively process and connect to representations.
  • Limitations of Working Memory – The crucial insight that the human brain has built-in structural capacity limits, demonstrated by the ability to only process and store roughly seven chunks of information at one time.
  • Physical Symbol System Hypothesis (PSSH) – The foundational hypothesis asserting that a physical computational system contains the necessary and sufficient means for general intelligent action through the manipulation of formal symbols.
  • Representations – The central component of the computational theory of mind, referring to the fundamental symbols and analog formats that encode information the mind perceives and transforms.
  • Three Levels of Information Processing – The essential breakdown of cognitive processes into the abstract computational level, the rule-based algorithmic level, and the physical implementation level in the brain hardware.

Core concepts

  • Cognitive Science: An interdisciplinary field merging philosophy, linguistics, anthropology, neuroscience, AI, and psychology to answer fundamental questions about mental phenomena.
  • Basic Cognitive Processes: The underlying mental activities responsible for human thought, including perception, attention, memory, metacognition, learning, affect, and executive functioning.
  • Classical and Operant Conditioning: Two distinct behavioral learning mechanisms where classical conditioning involves reflexive responses to paired stimuli, while operant conditioning shapes voluntary behaviors via reinforcement and rewards.
  • Latent Learning: Unobservable internal learning that occurs without immediate reinforcement or behavioral output, indicating that cognitive states exist independently of external actions.
  • Algorithms and Turing Machines: Step-by-step mathematical procedures used to solve computable problems, theorized through abstract machines that navigate, read, and edit symbols on an infinite tape.
  • Sensation vs. Perception: Sensation is the raw, instantaneous input of stimuli from sensory modalities, whereas perception is the mind’s completely integrated representation constructed from those basic sensations.
  • Top-Down vs. Bottom-Up Processing: The bidirectional pathways of perception, where top-down relies on stored knowledge and schemas to interpret stimuli, while bottom-up builds a perception directly from basic external features.
  • Implicit vs. Explicit Memory: The categorization of long-term storage where implicit memory encompasses unconscious retrieval, such as procedural habits, and explicit memory covers the conscious recall of facts and episodic events.
  • Feature Binding: The cognitive function that successfully unites independent sensory properties, such as color and shape, from different sensory modalities into a single integrated object within working memory.
  • Independent and Dependent Variables: In research methodology, the independent variable is the element manipulated to cause a change, whereas the dependent variable is the resulting outcome being measured.

Theories and Frameworks

  • Behaviorism: A psychological movement that evaluated the mind purely through observable actions and conditioning, explicitly rejecting unobservable mental states.
  • Transformational Grammar: A linguistic framework distinguishing between a language’s deep structural rules and its surface arrangement, illustrating how a finite set of symbols can combine to generate infinite meanings.
  • Information Processing Theory: A theoretical perspective positing that the human mind functions as a sequential computational pipeline featuring selective attention filters and chunk-based memory storage.
  • Computational Theory of Mind: The primary framework proposing that human cognition is analogous to a computer algorithm, operating through the rule-governed manipulation of internal symbols and representations.
  • Dual Coding Hypothesis: The theory suggesting that human mental representations occur in two primary formats: analog formats using geometric space and digital formats using discrete symbols.
  • Demon Model (Pandemonium): A bottom-up cognitive model explaining that basic sensory features are detected by localized “image demons,” which synthesize their inputs until a “decision demon” categorizes the entire object.
  • Multi-Store Memory Model: A structural framework tracing memory as it moves from environmental sensory input to short-term working retention, eventually undergoing consolidation to reach long-term storage.
  • Central Executive Working Memory Model: A short-term memory framework defining a central executive hub that coordinates modality-specific subsystems, including the phonological loop for auditory repetition and the visuospatial sketchpad for geometry.
  • Stages of Cognitive Development: A developmental psychology framework organizing a child’s cognitive maturation into the sensorimotor, pre-operational, concrete operational, and formal operational stages.
  • Zone of Proximal Development (ZPD): An educational psychology concept identifying the optimal learning space as the gap between what a learner can achieve independently and what they require external scaffolding to master.
  • Cognitive Behavioral Therapy (CBT): A clinical psychology approach that integrates the restructuring of personal cognitive beliefs with systemic desensitization to address anomalous behavior and mental distress.

Notable Individuals

  • Santiago Ramón y Cajal: Discovered the structural cellular composition of the nervous system.
  • Camillo Golgi: Invented a specialized tissue-staining method used to visualize neural cells.
  • William James: A founding father of psychology known for studying consciousness, emotion, and pragmatism.
  • Wilhelm Wundt: A founder of psychology recognized as one of the first experimental psychologists.
  • Ivan Pavlov: Demonstrated classical conditioning through experiments pairing unconditioned and neutral stimuli in dogs.
  • B.F. Skinner: Popularized operant conditioning by establishing how voluntary animal behavior is shaped through systemic rewards.
  • Edward Tolman: Proved the existence of latent learning by demonstrating that rats can memorize mazes without observable rewards.
  • Alan Turing: Laid the abstract theoretical foundations for computation and algorithms by conceiving the universal Turing machine.
  • Noam Chomsky: Revolutionized linguistics and cognition by proposing transformational grammar and deep structures.
  • George Miller: Hypothesized that working memory storage is structurally limited to processing approximately seven chunks of information.
  • Donald Broadbent: Outlined the cocktail party phenomenon to explain the mind’s selective attention filter.
  • Allen Newell & Herbert A. Simon: Formulated the Physical Symbol System Hypothesis, connecting formal symbol manipulation to general intelligent action.
  • Allan Paivio: Created the dual coding hypothesis to explain how the mind utilizes both analog and digital representations.
  • David Marr: Defined the three distinct analytical levels of information processing: computational, algorithmic, and implementation.
  • Oliver Selfridge: Formulated the “demon” model to explain bottom-up object recognition and perceptual feature synthesis.
  • David Navon: Studied global precedence, revealing that top-down global identification typically occurs faster than local feature detection.
  • Immanuel Kant: A philosopher who conceptually divided reality into the inaccessible noumena and the consciously perceived phenomena.
  • Richard Atkinson & Richard Shiffrin: Developed the multi-store memory model distinguishing short-term processing from long-term memory consolidation.
  • Baddeley & Lewis: Explored auditory working memory by demonstrating how the phonological loop relies on repetition and can be disrupted.
  • Jean Piaget: Defined the sequential chronological stages of cognitive child development.
  • Lev Vygotsky: Emphasized sociocultural educational dynamics and conceptualized the zone of proximal development.
  • Carl Rogers: Pioneered humanistic clinical psychology, focusing therapy primarily on the individual person’s needs.
  • Abraham Maslow: Established the hierarchy of needs framework that outlines the human progression toward self-actualization.

Readings

“Introduction: Exploring Inner Space” This article defines cognitive science as the interdisciplinary study of the mind, fundamentally viewing the mind as an information processor. At the core of this perspective are two main components: mental representations and computation. Representations encode information and can take several forms, including digital/symbolic representations (discrete values with semantic meaning, like language), analog representations (continuous formats preserving spatial properties, like visual images), and propositional representations (abstract, logical relationships between concepts). Computation refers to the operations and transformations performed on these representations. To understand these mental operations, the text outlines David Marr’s tri-level hypothesis, which evaluates processing at three levels: the computational level (what the problem is and why it exists), the algorithmic level (the formal step-by-step procedures used to solve it), and the implementational level (the physical hardware or biological wetware carrying out the process). The article also briefly contrasts the classical formal systems approach (using local symbols and discrete, sequential processing) with the connectionist approach (using distributed patterns of activation and parallel processing).

“The Magical Number Seven, Plus or Minus Two” by George A. Miller Miller’s foundational 1956 paper examines the structural limits of human information processing. He demonstrates that the span of absolute judgment—our ability to accurately categorize unidimensional stimuli such as pitch, loudness, or taste without error—is generally limited to around seven distinct categories, or approximately 2.5 bits of information. While adding more variable dimensions to a stimulus can increase overall channel capacity, it decreases our accuracy for any individual variable. Crucially, Miller distinguishes absolute judgment limits from the span of immediate memory, which is also limited to about seven items, but is bounded by the number of “chunks” rather than the amount of raw information (bits). To circumvent these built-in cognitive bottlenecks, humans constantly use recoding. By grouping, organizing, and renaming inputs into familiar, information-rich chunks (such as translating data into a verbal code), we effectively increase the amount of data we can process and remember at one time.

“What Might Cognition Be, If Not Computation?” by Tim Van Gelder Van Gelder challenges the orthodox view of cognitive science, which assumes that cognition is exclusively computational—a process defined by the sequential, cyclic, rule-governed manipulation of internal symbolic representations. As an alternative, he proposes the dynamical hypothesis, suggesting that cognitive systems might be better understood as dynamical systems where cognition is the continuous evolution of numerical states in real time. To illustrate this, he contrasts a hypothetical “computational” steam engine governor with the actual Watt centrifugal governor. The Watt governor successfully regulates speed without measuring, computing, or using symbols; instead, it relies on continuous, non-representational, mutually determining coupling with the engine. Van Gelder classifies cognitive models into three broad state-dependent systems: computational, connectionist, and dynamical. He argues that a dynamical approach—which views the brain, body, and environment as a single, tightly interlocked system interacting continuously—offers a highly viable, post-Cartesian framework for understanding complex cognitive behaviors like decision-making.