Motor learning Study Guide

📖 Core Concepts Motor Learning – Durable changes in movement produced by nervous‑system re‑organization; ranges from rapid skill tweaks to lifelong adjustments. Motor Adaptation – Temporary performance shifts in response to a perturbation; not retained long‑term. Contextual Interference – Learning difficulty that arises when multiple tasks are practiced together; high interference (varied practice) yields better retention/transfer. Intrinsic Feedback – Naturally occurring sensory cues (vision, proprioception, audition) generated by the movement itself. Extrinsic Feedback – Added information from an outside source; split into Knowledge of Performance (KP) (quality/pattern) and Knowledge of Results (KR) (outcome relative to goal). Specificity of Learning Hypothesis – Practice must mimic the exact environmental and movement conditions of the target performance for optimal learning. Overlearning – Continued practice after mastery; boosts long‑term retention with little immediate performance change. 📌 Must Remember Permanence vs. Adaptation: Learning = relatively permanent; adaptation = transient. Varied Practice Effect: May lower acquisition speed but enhances motor schemata → better retention & transfer. KR Frequency: Too much KR → performance boost during practice but poorer transfer (Guidance Hypothesis). Transfer Design: Acquisition block (manipulate KR) → rest → Transfer block (often no‑KR) isolates true learning. Key Brain Structures: Cerebellum & basal ganglia are essential for motor learning across vertebrates. Overlearning Benefit: Major boost to long‑term retention, minimal effect on immediate performance. 🔄 Key Processes Skill Acquisition Cycle Practice → Intrinsic + Extrinsic Feedback → Error Detection → Neural/behavioral adjustments → Improved performance. KR Transfer Design Acquisition Phase: Apply varied KR schedules (e.g., 100%, 50%, 0%). Rest Interval: Allows performance effects to decay. Transfer Phase: Test with no KR; performance change = learning. Contextual Interference Implementation Blocked Practice: Same task repeated → fast acquisition, poor transfer. Random/Varied Practice: Intermix tasks → slower acquisition, strong retention/transfer. 🔍 Key Comparisons Intrinsic vs. Extrinsic Feedback Intrinsic: Self‑generated, always present; limited to senses. Extrinsic: Added by coach/tech; can be tailored (KP vs. KR). KP vs. KR KP: Describes movement quality (e.g., joint angles). KR: Reports outcome success (e.g., “hit the target”). Blocked vs. Varied Practice Blocked: Low contextual interference → quick early gains, low transfer. Varied: High interference → slower early gains, high transfer. ⚠️ Common Misunderstandings “More feedback = better learning.” – Excessive KR creates dependency; optimal learning often uses reduced or faded KR. “Blocking is always worse.” – For very early novices, blocked practice can build initial confidence before introducing interference. “Adaptation equals learning.” – Adaptation is short‑term; true learning persists after perturbation removal. 🧠 Mental Models / Intuition “Feedback as a GPS.” – Intrinsic cues are the car’s dashboard; extrinsic KR/KP are turn‑by‑turn directions. Too many directions (KR) make you rely on the GPS and forget how to read the dashboard. “Practice as a sculptor.” – Repeating the same chisel stroke (blocked) shapes quickly but leaves rough edges; varying the strokes (varied) refines the sculpture for lasting detail. 🚩 Exceptions & Edge Cases Skill Level Dependency: Advanced learners benefit from reduced KR frequency and increased difficulty (Challenge Point Framework). Task Difficulty: Extremely easy tasks may not need any KR; very hard tasks may require more frequent KR to prevent frustration. 📍 When to Use Which Choose Varied Practice when goal is long‑term retention or transfer to new contexts. Use Blocked Practice for initial familiarization or when the learner is a complete novice and needs confidence. Provide KR early in training to motivate and guide; fade it gradually as performance stabilizes. Employ KP when precise movement patterns matter (e.g., gymnastics, rehabilitation). Apply Transfer Design in research or advanced training to differentiate true learning from temporary performance boosts. 👀 Patterns to Recognize Performance dip after introducing KR → likely “guidance hypothesis” effect; expect later improvement on transfer. Improved retention after a rest period → indicates overlearning has occurred. Better transfer when practice includes variable task parameters → hallmark of high contextual interference. 🗂️ Exam Traps Distractor: “More KR always improves learning.” – Wrong; excessive KR can impair transfer. Distractor: “Blocked practice always yields the best learning.” – Wrong; it hampers retention/transfer for most skills. Distractor: “Motor adaptation is permanent.” – Wrong; adaptation is transient, unlike true motor learning. Distractor: “KP and KR are the same.” – Wrong; KP informs about movement quality, KR reports outcome success. Distractor: “Only the cerebellum matters for motor learning.” – Wrong; basal ganglia also play a critical role.