Chapter 7: Memory

Three Phases of Memory

• Encoding: The process of entering information into memory.
• Storage: The act of placing this information into the memory system, similar to putting a box into a closet.
• Retrieval: The ability to access and bring that information back when needed, akin to taking the box out of the closet.

Serial Position Effect

• Easier to remember items at the beginning and end of a list:   - Primacy Effect: Items at the beginning are easier to recall because they receive more focus.   - Recency Effect: Items at the end are recalled because they were recently presented.   - Notably, if a word stands out, it can disrupt this typical recall chain.

Types of Recall

• Recall: Attempting to remember information without cues (e.g., "What does this guy look like?").
• Recognition: Information is presented, and the task involves recognizing it (e.g., answering multiple-choice questions).

Interference in Memory

• Proactive Interference: Previous material (e.g., what you learned in Chapter 2) interferes with new material (e.g., what you learned in Chapter 3).
• Retroactive Interference: New material (Chapter 3) interferes with the recall of older material (Chapter 2).

Sensory Memory

• Involves sensory input – essentially a stimulus.
• Does not retain information for long, but contains a wealth of detail.
• Two types:   - Echoic Memory: Pertains to auditory stimuli (sound).   - Iconic Memory: Pertains to visual stimuli (sight) and is faster than echoic memory due to the speed of light.

Short-Term Memory (STM)

• Duration: Approximately 30 seconds.
• Capacity: 7 ± 2 items (5-9).
• Improvement Techniques:   - Chunking: Grouping information into manageable units (e.g., phone numbers).   - Imagery: Visualizing concepts to enhance recall.   - Self-Referencing Effect: Relating information to personal experiences for better retention.   - Rehearsal: Repeating information to extend the duration of memory but can lead to repetition errors.

Long-Term Memory (LTM)

• Compared to an old photo album, it holds more information but with less detail.

Explicit Long-Term Memory

• Involves conscious recollection and is declarative.   - Episodic Memory: Personal experiences and events.   - Semantic Memory: General knowledge and facts not tied to personal experiences (e.g., the capital of Florida).

Implicit Memory

• Less accessible and not necessarily articulated; involves skills and habits learned unconsciously.   - Procedural Memory: Skills performed automatically (e.g., riding a bicycle).

Working Memory

• Involves holding and manipulating information while performing a task, distinguishing it from STM, which strictly holds information without concurrent processing.
• Example scenarios: taking a test while recalling information or driving while navigating.

Chunking in Detail

• Chunking: Grouping parts of content can increase capacity for information.   - E.g., phone number formatted as 555-555-555; debit card chunked into four segments of four digits each.

Imagery

• The use of pictures or visual concepts strengthens recall in STM.
• Aids both memory duration and capacity.

Self-Referencing Effect

• Tendency to remember information better when it is related to oneself.

Rehearsal

• The repetition of information to enhance retention.
• Risks include the potential for errors similar to the game of telephone.

Context-Dependent Memory

• Retrieval of information is often better in the same context where the encoding occurred.   - Example: Learning in bed makes recalling easier when taking a quiz in bed.

Amnesia

• A severe loss of memory can occur due to various factors, including traumatic brain injuries, dementia (most commonly Alzheimer's), and substance abuse.   - Anterograde Amnesia: Difficulty forming new memories.   - Retrograde Amnesia: Inability to recall past events.

Eyewitness Testimony

• Generally regarded as unreliable; often imperfect with gaps, leading to the brain filling in details based on logical inferences, emotions, and external suggestions.

Chapter 9: Intelligence

Intelligence Quotient (IQ)

• Formula: $ext{IQ} = \frac{ ext{Mental Age}}{ ext{Chronological Age}} imes 100$   - If mental age is below chronological age, the individual is considered to have below-average intelligence.

Controversies Surrounding IQ Tests

• Challenges in defining and measuring intelligence,
• Issues of cultural bias and whether intelligence is universally applicable across backgrounds,
• Influence of factors such as mental health, self-esteem, prejudice, and discrimination.

Theories of Intelligence

• Spearman's G: Concept of a general intelligence factor.
• Gardner's Multiple Intelligences: suggests various types of intelligence beyond the general factor.
• Distinctions between:   - Fluid Intelligence: The ability to reason and adapt in new situations.   - Crystallized Intelligence: Accumulated knowledge and experience over time.

Disabilities Related to Intelligence

• Intellectual Disability: Challenges in adapting to environmental demands, potentially impacting independent living skills.
• Learning Disability: Characterized by normal or above-normal intelligence with difficulties in specific areas;   - Developmental Dyslexia: Difficulty with reading and decoding words.   - Developmental Dyscalculia: Difficulty with basic math concepts and calculations.

Classical Conditioning: Pavlov's Experiment

• Example: Training a dog to salivate under conditioned circumstances involving:   - Unconditioned Stimulus (UCS): Stimulus that naturally triggers a response (food).   - Unconditioned Response (UCR): Natural reaction to the UCS (salivation).   - Neutral Stimulus (NS): Stimulus that initially does not trigger a response (bell).   - Conditioned Stimulus (CS): Stimulus that, after conditioning, triggers a response (bell).   - Conditioned Response (CR): Learned reaction to the CS (salivation to bell).

Key Concepts in Classical Conditioning

• Generalization: Similar stimuli elicit similar responses.
• Discrimination: Different stimuli yield different responses.
• Extinction: CR diminishes over time with repeated absence of the CS.
• Spontaneous Recovery: CR re-emerges after a time delay without exposure to the CS.

Operant Conditioning

• Involves reinforcement and punishment:   - Positive Reinforcement: Adding a favorable stimulus to enhance behavior (e.g., praising for good performance).   - Negative Reinforcement: Removing an unpleasant stimulus (e.g., taking pain relief).   - Positive Punishment: Introducing an unfavorable outcome to reduce behavior (e.g., giving a speeding ticket).   - Negative Punishment: Removing a positive stimulus (e.g., taking away a gaming console).

Types and Schedules of Reinforcement

• Primary Reinforcers: Naturally satisfying (e.g., food, shelter).
• Secondary Reinforcers: Gains satisfaction through conditioning over time (e.g., money).

Reinforcement Schedules

• Fixed Ratio: A specific number of responses leads to reinforcement (e.g., dog receives a treat every 5 times it sits).
• Fixed Interval: Set time periods elapse before reinforcement (e.g., dog receives a treat every 5 minutes).
• Variable Ratio: No fixed number of responses required (e.g., dog receives treats after 5 sits one time and after 3 the next).
• Variable Interval: Reinforcement based on unpredictable intervals (e.g., dog receives treats at random times such as 5 minutes, then 10 minutes).

Observational Learning

• Learning by observing and imitating the behavior of others, which can be both positive and negative.
• Albert Bandura Experiment: Children imitated adult behavior towards a Bobo doll, whether aggressive or peaceful.

Social Psychology Topics

Prejudice vs. Discrimination

• Prejudice: An unjustified attitude projected towards a group and its members, often learned.
• Discrimination: The action taken against individuals based on prejudiced beliefs.

Techniques of Persuasion (Compliance)

• Foot-in-the-Door: Start with a small request to gain agreement, then increase demand.
• Door-in-the-Face: Begin with an excessive request, and when denied, offer a smaller, more reasonable request.

Prosocial Behavior

• Altruism: Selfless concern for others.
• Bystander Effect: A phenomenon where individuals are less likely to offer help in emergencies when others are present.

Aggression and Influences

• Psychological influences on aggression include:   - Negative Environmental Factors: Weather, crowding, and stress.   - Perception of Unfairness: Feeling that one was wronged can trigger aggression.   - Observational Learning: Learning aggressive behaviors through media exposure (e.g., violent video games).

Team Dynamics and Social Behavior

• Social Loafing: Decreased effort by individuals in group settings; reduced in small groups where contributions can be measured.
• Social Facilitation: Improved performance in front of an audience, especially if skilled; can negatively affect novices.

Heuristics in Decision-Making

• Cognitive Heuristics: Mental shortcuts may result in biases and inaccuracies in judgments.   - Representative Heuristic: Judging based on stereotypes or generalizations.   - Availability Heuristic: Evaluating the likelihood of events based on memorable examples.   - Familiarity Heuristic: Familiar items are favored over unfamiliar ones, affecting product and political preferences.

Cognitive Biases

• Confirmation Bias: Tendency to seek information that supports one’s existing beliefs while ignoring contradictory data.
• Self-Serving Bias: Attributing personal successes to individual actions but blaming external factors for failures.
• Fundamental Attribution Error: Overestimating personal characteristics while underestimating situational contexts in others’ behaviors.

Social Comparison

• Evaluating personal characteristics in relation to others to build self-perception.   - Downward Social Comparison: Comparing oneself to those perceived to be inferior for self-esteem boosts.   - False Consensus Effect: Overestimating how much others share one’s beliefs to enhance social belonging.

Cognitive Dissonance Theory

• The discomfort stemming from conflicts between attitudes and behaviors.   - Can be mitigated by:     - Changing behaviors to align with attitudes.     - Adjusting attitudes to match behaviors (often influenced by peer pressure).

Love and Relationships

• Proximity Hypothesis: Increased likelihood of forming connections with those geographically closer.
• Mere Exposure Effect: The tendency to prefer individuals more frequently encountered.
• Assumed Reciprocity: Preference arises for those believed to reciprocate liking.
• Similarity: Commonalities in interests and backgrounds foster attraction.

The Importance of Physical Attractiveness

• Vital role in social interactions and is often influenced by symmetry and perceived youthfulness.

Key Studies in Social Psychology

• Asch's Experiment (Conformity): An individual's responses to line length comparisons among group members yielding false feedback creates pressure to conform.
• Zimbardo's Prison Study: Analysis of group dynamics under simulated conditions revealing transformations in behavior paradigms rapidly within a short timeframe.