### Study Guide: Modules 18–29 (AP Psychology)
---
### Modules 18–20: Sensation and Perception
#### Module 18: Vision
- The Eye: Know the parts (cornea, iris, lens, retina) and their functions in focusing light and processing visual information.
- Retina: Contains rods (low-light, peripheral vision) and cones (color, detail).
- Optic Nerve: Transmits visual information to the brain.
- Visual Processing:
- Feature Detection: Neurons in the brain’s visual cortex respond to specific features (edges, movement).
- Parallel Processing: Processing multiple aspects of a scene (color, motion, depth) simultaneously.
#### Module 19: Perceptual Organization
- Gestalt Principles: The brain organizes visual information into a whole:
- Figure-ground: Differentiating objects from the background.
- Grouping: Rules like proximity, similarity, and continuity.
- Depth Perception:
- Binocular Cues: Require both eyes (e.g., retinal disparity).
- Monocular Cues: Use one eye (e.g., linear perspective, texture gradient).
- Motion Perception: Understanding apparent motion and real motion.
#### Module 20: Hearing
- The Ear:
- Outer Ear: Funnels sound waves.
- Middle Ear: Transfers vibrations via the ossicles (hammer, anvil, stirrup).
- Inner Ear: Cochlea converts vibrations into neural signals.
- Theories of Pitch Perception:
- Place Theory: Different frequencies stimulate different parts of the cochlea.
- Frequency Theory: The rate of nerve impulses matches the frequency of the tone.
- Hearing Loss: Distinguish between sensorineural and conductive hearing loss.
---
### Modules 21–23: States of Consciousness
#### Module 21: Other Senses
- Touch: Comprised of pressure, warmth, cold, and pain.
- Pain:
- Gate-Control Theory: Spinal cord regulates pain signals.
- Taste: Sweet, salty, sour, bitter, umami.
- Smell (Olfaction): Linked closely to memory and emotion.
- Kinesthetic Sense: Awareness of body part position.
- Vestibular Sense: Balance and head movement via the inner ear.
#### Module 22: Consciousness and Hypnosis
- Consciousness: Awareness of self and environment.
- Hypnosis: A social interaction involving heightened suggestibility.
- Theories: Social influence and dissociation.
#### Module 23: Sleep and Dreams
- Sleep Cycles: NREM (1-3 stages) and REM sleep (dreaming stage).
- Functions of Sleep: Memory consolidation, energy restoration, growth.
- Sleep Disorders: Insomnia, narcolepsy, sleep apnea, night terrors.
- Dream Theories: Freud’s wish-fulfillment, information processing, activation-synthesis.
---
### Modules 24–26: Learning
#### Module 24: Classical Conditioning
- Key Concepts:
- US, UR, NS, CS, CR.
- Acquisition, extinction, spontaneous recovery, generalization, discrimination.
- Pioneers: Ivan Pavlov (dog experiments).
#### Module 25: Operant Conditioning
- Key Concepts:
- Reinforcement (positive/negative).
- Punishment (positive/negative).
- Shaping: Reinforcing successive approximations of a desired behavior.
- Schedules of Reinforcement:
- Fixed-ratio, variable-ratio, fixed-interval, variable-interval.
- Pioneers: B.F. Skinner (Skinner box).
#### Module 26: Cognitive Learning
- Observational Learning: Learning by watching others (modeling).
- Pioneers: Albert Bandura (Bobo doll experiment).
---
### Modules 27–29: Memory
#### Module 27: Memory Encoding
- Key Processes:
- Encoding: Getting information into memory.
- Storage: Retaining information over time.
- Retrieval: Getting information back out.
- Types of Encoding:
- Semantic (meaning), visual (images), and acoustic (sounds).
#### Module 28: Memory Storage
- Three-Stage Model:
- Sensory Memory: Immediate recording of sensory information.
- Short-Term Memory: Active processing (7 ± 2 items capacity).
- Long-Term Memory: Unlimited storage capacity.
- Explicit Memory: Facts and experiences (processed in the hippocampus).
- Implicit Memory: Skills and conditioned associations (processed in the cerebellum).
#### Module 29: Memory Retrieval
- Retrieval Cues: Associations that help recall information.
- Forgetting: Caused by encoding failure, storage decay, or retrieval failure.
- Interference:
- Proactive Interference: Old information interferes with new learning.
- Retroactive Interference: New learning interferes with old memories.
- Amnesia: Retrograde (loss of old memories) vs. anterograde (inability to form new memories).
---
### Study Tips:
1. Create Flashcards: Use them for key terms and theories.
2. Practice Diagrams: For processes like the sleep cycle or memory stages.
3. Apply Examples: Relate theories to everyday experiences.
4. Self-Quiz: Use end-of-module practice questions if available.
5. Group Study: Discuss concepts like classical conditioning or observational learning with peers for better understanding.
Good luck with your studies! Let me know if you need deeper dives into any module! 🚀