Motor Development, Spatial Navigation, and Cognitive Science

Vocabulary practice cards reviewing concepts in motor skill development, biological and artificial navigation, spatial representations, and cognitive decision-making systems.

Perception–Action Loop

The cyclical process of motor control: body and world → sensory input → controller → motor command → changes to body/world → new sensory input.

Fixed Movement

A movement pattern that repeats the exact same command-to-movement mapping without adjusting for context.

Skilled Action

A movement pattern that flexibly adapts to the current state of the body and the surrounding environment.

Stuttering into Existence

The developmental phenomenon where a motor skill appears one day and is not reliably present the next, illustrating that motor development is gradual rather than an on/off switch.

Variability (in Toddler Walking)

Movement variations that provide practice across varied postures, environments, and movements, functioning as the actual practice itself rather than merely error.

Fluency

The ability to execute the same movement better, smoother, or more efficiently.

Flexibility (Motor Control)

The ability to modify and adjust movement patterns to meet novel situations or environmental demands.

Days of Walking Experience

The metric of accumulated locomotor practice that predicts toddler gait changes significantly better than chronological age.

Falls (Motor Learning Function)

Locomotor errors that provide essential sensory and physical feedback about a mismatch between the body and the world to inform the subsequent attempt.

Embodied Motor Development

The principle that an organism must learn to control its specific, individual physical body, which continuously changes with growth, clothing, load, posture, and fatigue.

Longer-Leg Experiment

An experimental demonstration showing that motor control cannot be separated from body morphology and that practice allows rapid behavioral compensation for physical bodily changes.

Embedded Motor Development

The principle that an organism must learn the specific physical features, properties, and constraints of the world and environment in which it acts.

Affordances

The action possibilities available for a specific body within a specific physical environment.

Crawling-to-Walking Transition

A developmental shift during which expert crawlers become novice walkers and temporarily misjudge environmental hazards because the body–environment relationships change.

Path Integration

The process of continuously updating an internal representation of the distance and direction of home based on one's own self-movement, without relying on external cues.

Desert Ant Home Vector

An internal spatial representation of direction and distance that enables desert ants to run straight toward their nest after a winding outward foraging path.

Sun Compass (Desert Ants)

The celestial directional cue utilized by desert ants, which is continuously corrected for the sun's movement using the time of day.

Stilts and Stumps Experiment

A landmark study where lengthening ant legs with stilts caused overshooting and shortening legs to stumps caused undershooting of home, supporting a pedometer-like step-counting mechanism.

Optic Flow (Bee Navigation)

The visual motion cue of ground texture streaming beneath flying bees used to gauge distance, unaffected by wind speed.

Recurrent Network Location Tracking (Banino et al., 2018)

A study demonstrating that a recurrent neural network provided only velocity and direction inputs can learn to track location, spontaneously giving rise to grid-like representations and shortcut navigation without an explicit map.

Map-Like Spatial Representation

An enduring spatial representation that encodes viewpoint-independent geometric relationships among places.

Photograph-Like Spatial Representation

An enduring spatial representation based on view-dependent snapshots tied to specific perceptual viewpoints.

Navigational Wormhole Experiments

Experiments in virtual environments demonstrating that participants learned wormhole mazes as quickly as Euclidean mazes, took wormhole shortcuts, and failed to notice non-Euclidean anomalies, indicating the absence of a Euclidean cognitive map.

Place Cells

Neurons located in the hippocampus that fire when an organism is in a specific, localized area of an environment.

Head-Direction Cells

Neurons located in the subiculum that fire in response to the specific directional heading of the animal's head.

Grid Cells

Neurons located in the entorhinal cortex that fire at periodic, regular triangular intervals, providing a spatial coordinate grid.

Parahippocampal Place Area (PPA)

A ventral visual cortex area that responds strongly to scenes, including bare empty rooms, but not to arrays of isolated objects, displaying view-specific adaptation.

Reorientation

The behavioral process of regaining one's directional bearings and sense of location following disorientation.

Domain-Specific Reorientation

A property of reorientation wherein the navigation system specifically extracts the geometry of extended surface layouts, ignoring surface patterns or isolated objects.

Task-Specific Reorientation

A property of spatial cognition where geometric layout cues are dedicated specifically to reorientation, while other tasks can utilize feature landmarks.

Encapsulated Reorientation

A cognitive property whereby non-geometric features (such as a colored wall) can be perceived and remembered, yet remain inaccessible to the geometric reorientation system.

Bee-Inspired Drone

An autonomous drone that used path integration as an internal teaching signal to learn a mapping from panoramic views to home vectors, consistently returning within $0.5\text{ m}$ of home across 48 test flights.

Verbal Shadowing

A dual-task manipulation in which continuous speech repetition selectively impairs adults' ability to combine landmarks with geometry during reorientation, whereas rhythm shadowing causes no impairment.

Dual Representation

The cognitive requirement to understand a symbolic entity both as an independent concrete physical object and as a representation of another real-world entity.

Shrinking-Room Experiment

An experimental paradigm proving that young children's difficulty with scale models is conceptual regarding symbolic function (dual representation) rather than limitations in perceptual capacity, memory, or attention.

Basic Coordination Rules (Collective Movement)

The three universal behavioral rules underlying collective animal movement: move away from very nearby neighbors, avoid becoming isolated, and align travel direction with nearby individuals.

Social Cognition as an Inverse Problem

The challenge of inferring unobservable, hidden mental states (such as goals, visual attention, and knowledge) solely from observable bodily behavior.

Rational Imitation

The tendency of observers, such as infants, to imitate an actor's specific behavioral means only when evaluated in light of the actor's physical constraints (e.g., copying a forehead action when the actor's hands are free, but using hands if the actor's hands are occupied).

Reasoning

The cognitive process of inferring hidden, unobserved, future, or hypothetical information from available data.

Decision Making

The cognitive process of using gathered information and computed inferences to evaluate and select an overt course of action.

Heuristics

Fast, computationally cheap decision shortcuts utilized because time, memory, accessible information, and processing power are fundamentally limited.

Model-Free Control

A reinforcement learning control policy that simply repeats previously rewarded actions without building or consulting an internal representation of environment structure.

Model-Based Control

A decision control architecture that predicts the consequences of actions and plans forward steps by utilizing an internal model of environmental structure.

Centaur

A computational model fine-tuned on human behavioral choice data that accurately predicts held-out behavior and generalizes across novel narratives, tasks, and task domains.

Fear (Adaptive Function)

An emotional state that primes the physical body for immediate defensive action by redirecting energetic resources to skeletal muscles and focusing visual attention on escape routes.

Somatic Marker Hypothesis

The hypothesis proposing that emotional and physiological associations from past outcomes become reactivated as bodily signals that automatically bias future decisions.

Emotion Vectors (Anthropic Study)

Representations of emotion identified in artificial intelligence models that generalize across varied contexts and causally steer model text outputs when manipulated, without confirming subjective emotional experience.