AP Psych Unit 2 (edit def)
This review focuses on key terms, theories, and concepts in the second unit of AP Psychology, specifically on cognition—the process behind how we think, learn, remember, and use information. Tim Stemman introduces the unit, encouraging viewers to engage with the material and emphasizing the importance of cognition in daily life.
Introduction to Cognition:
The purpose of this review is to cover mental activities like perception, memory, problem-solving, and decision-making.
Understanding these concepts not only enhances your intelligence but also prepares you for the AP Psych test.
Perception (Topic 2.1):
Sensation vs. Perception:
Sensation: The biological process in which sensory organs detect physical stimuli from the environment, allowing the body to receive sensory input.
Ex: Light and sound
Perception: The cognitive process of interpreting and organizing sensory information to understand the surrounding environment, involving mental awareness and recognition of stimuli.
Bottom-Up vs. Top-Down Processing:
Bottom-Up Processing: Builds perception from individual sensory information (e.g., recognizing a bug).
Top-Down Processing: Uses pre-existing knowledge to interpret sensory information (e.g., reading jumbled text).
Other Important Concepts:
Schemas: Mental frameworks that organize and interpret information.
Perceptual Sets: Tendency to perceive certain aspects of sensory data while ignoring others based on expectations.
Context Effects: The environment influences our perception of stimuli.
Selective Attention: Focuses on a specific stimulus while ignoring others (demonstrated through the cocktail party effect).
Change Blindness: Failing to notice changes in one’s environment when attention is focused elsewhere.
Gestalt Principles:
Our brains are wired to see patterns and shapes; principles include:
Figure-Ground Relationship: Distinguishing an object from its background.
Closure: Filling in gaps to perceive complete objects.
Proximity: Grouping nearby objects together.
Similarity: Grouping similar looking objects together.
Depth Perception:
Monocular Cues: Can be perceived with one eye; include relative clarity, relative size, texture gradient, linear perspective, and interposition.
Binocular Cues: Require both eyes; include convergence (inward movement of eyes) and retinal disparity (difference in images between eyes).
Perceptual Constancies: Understanding that objects maintain shape and size despite changes in retinal image (size and shape constancy).
Apparent Movement: Perceiving motion in stationary objects based on visual cues.
Thinking, Problem-Solving, Judgments, and Decision-Making (Topic 2.2):
Concepts: Mental groupings of similar objects/events that form the basis of thoughts.
Prototypes: Ideal or typical examples of a concept; vary based on personal experiences.
Schemas: Help organize and interpret information through assimilation (adding to existing schemas) and accommodation (adjusting schemas to fit new info).
Problem-Solving Methods:
Algorithms: Step-by-step procedures guaranteeing a solution (e.g., recipes).
Heuristics: Mental shortcuts that speed up problem-solving but may lead to errors (e.g., choosing a shorter checkout line).
Judgment Influences:
Representative Heuristic: Judging likelihood based on comparison with prototypes.
Availability Heuristic: Judging threat based on immediate examples in memory.
Decision-Making Influences:
Mental Set: Using past solutions to solve current problems may create fixation.
Framing: The way information is presented.
Priming: Previous exposure influencing response.
Cognitive Fallacies:
Gambler’s Fallacy: Misbelief that past events affect future outcomes.
Sunk Cost Fallacy: Continuing an endeavor based on previously invested resources.
Executive Function: Includes skills to manage thoughts, actions, and emotions.
Working Memory: Holding and manipulating information.
Cognitive Flexibility: Switching between different tasks.
Inhibitory Control: Suppressing impulsive responses.
Types of Thinking:
Divergent Thinking: Creativity and exploring multiple solutions.
Convergent Thinking: Narrowing down to a single best solution.
Functional Fixedness: Unable to see all potential uses for an object leading to limited creative thinking.
Introduction to Memory (Topic 2.3):
Memory Definition: Process of encoding, storing, and retrieving information.
Types of Memory:
Explicit Memory: Conscious recall of facts/events (episodic and semantic).
Implicit Memory: Skills and procedures we perform unconsciously.
Prospective Memory: Remembering to perform tasks in the future.
Long-term Potentiation (LTP): Strengthening synaptic connections through frequent activation.
Working Memory Model (Alan Baddeley): Contains 3 components:
Central Executive: Manages attention and coordination.
Phonological Loop: Deals with auditory information.
Visuospatial Sketchpad: Manages visual and spatial information.
Multi-Store Model of Memory:
Information flows through:
Sensory Memory: Brief holding (iconic/echoic).
Short-Term Memory: Holds limited info for about 20-30 seconds.
Long-Term Memory: Unlimited storage.
Encoding Memories (Topic 2.4):
Automatic Processing: Occurs without conscious effort.
Effortful Processing: Requires conscious effort, like studying.
Encoding Levels:
Structural Encoding: Focuses on visual appearance.
Phonemic Encoding: Focuses on sounds.
Semantic Encoding: Most effective for long-term memory (understanding meaning).
Mnemonic Devices: Techniques to aid memory retention.
Method of Loci: Associating information with locations.
Chunking and Categorizing: Grouping information for better retention.
The Spacing Effect: Distributed practice is more effective than cramming.
Serial Position Effect: Items at beginning/end of lists are remembered better (primacy/recency effects).
Storing Memories (Topic 2.5):
Maintenance Rehearsal: Repeating information to keep in short-term memory.
Elaborative Rehearsal: Linking new information to existing knowledge for better retention.
Highly Superior Autobiographical Memory (HSAM): Ability to recall events in detail.
Amnesia:
Anterograde Amnesia: Inability to form new memories post-injury.
Retrograde Amnesia: Loss of memories before the onset of amnesia.
Infantile Amnesia: Inability to recall early childhood memories due to underdeveloped brain structures.
Alzheimer’s Disease: Progressive neurological disorder leading to memory loss and cognitive decline.
Retrieving Memories (Topic 2.6):
Recall: Retrieving information without cues (open-ended questions).
Recognition: Identifying information when prompted (multiple choice responses).
Retrieval Cues: Stimuli that aid in accessing memories.
Encoding Specificity Principle: Retrieval is most effective under similar conditions.
Memory Types:
Context-Dependent Memory: Remembering better in the same environment where info was learned.
Mood Congruent Memory: Mood impacts the type of memories accessed.
State-Dependent Memory: Better recall when in the same physical or mental state during learning.
Testing Effect: Taking tests improves long-term retention of material more than studying alone.
Metacognition: Understanding and optimizing one’s own learning processes to enhance efficiency.
Forgetting and Other Memory Challenges (Topic 2.7):
Forgetting Curve: Information retention decreases over time without review.
Encoding Failure: Information not properly stored due to lack of attention.
Interference Theory: Difficulty retrieving information can be disrupted by other memories.
Proactive Interference: Older memories interrupt new memory recall.
Retroactive Interference: New info disrupts recall of older memories.
Tip of the Tongue Phenomenon: Temporarily unable to retrieve known info.
Repression: Unconsciously blocking out stressful memories for emotional protection.
False Memories: Events recalled inaccurately or not occurring at all due to misinformation or source confusion.
Constructive Memories: Memories are influenced by perceptions, thoughts, and experiences, highlighting their non-static nature.
Imagination Inflation: Imagining events can lead to increased confidence in their occurrence.
Memory Consolidation: Process of stabilizing short-term memories into long-term memory, which can involve alteration.
Intelligence and Achievement (Topic 2.8):
Intelligence Definition: Capacity to learn, adapt, understand complex ideas, and manipulate the environment.
Theories of Intelligence:
Spearman’s G Factor: A single underlying factor determines intelligence.
Sternberg’s Triarchic Theory: Divides intelligence into analytical, creative, and practical components.
Measuring Intelligence:
IQ Tests: Measure intelligence quotient based on the mental age vs. chronological age formula.
Validity and Reliability: Tests should accurately assess intelligence and yield consistent results.
Sociocultural Responsiveness in Testing: Designing tests sensitive to cultural differences to ensure fairness.
Stereotype Threat: Awareness of stereotypes affecting performance negatively.
Stereotype Lift: Positive stereotypes enhancing performance.
Flynn Effect: Increase in average IQ scores over time; attributed to many factors like better nutrition and education.
Inter- and Intra-group Variability in IQ Scores: Individual differences in intelligence are often greater within groups than between them.
Achievement vs. Aptitude Tests:
Achievement Tests: Measure knowledge in specific areas.
Aptitude Tests: Assess potential to learn or perform in particular areas.
Mindsets about Intelligence:
Fixed Mindset: Intelligence is static and unchangeable; may hinder performance and growth.
Growth Mindset: Intelligence can be developed through effort; encourages resilience and persistence.
Tim concludes by encouraging viewers to engage with the material and reminding them of these cognitive principles' importance in daily life.