Psychology Unit 1
1 The Scientific Attitude: Curiosity, Skepticism, and Critical Thinking
What is the Scientific Attitude?
Curiosity: Asking questions about behavior and mental processes.
Skepticism: Examining claims critically.
Humility: Being open to new ideas and aware we can make mistakes.
Curiosity
Asking "How do you know?" leads to new discoveries and a deeper understanding.
Can drive motivation for learning. Curious individuals always seek to learn more.
Engagement Question: What are you curious about? Think, Pair Share.
Metaphor: "Curiosity killed the cat, but satisfaction brought it back."
Skepticism
Don't believe everything you hear.
Skepticism means not accepting claims at face value (challenging the “facts”).
Involves questioning assumptions and looking for evidence.
Example: The flat earth theory.
Critical Thinking in Action
Critical Thinking Involves:
Examining assumptions.
Looking for hidden biases.
Assessing results (reading between the lines).
2 The Scientific Attitude: Hindsight Bias, Overconfidence, Empirical Investigation
Hindsight Bias
Defined as the “I Knew It All Along” phenomenon.
Tendency to believe we knew an outcome all along; creates an illusion of clarity about the past.
Engagement Question: How might hindsight bias affect how we view historical events? Can you think of a time you experienced hindsight bias? Think, Pair, Share.
Overconfidence
Defined as being more certain about our abilities than we should be.
Can lead to poor decision-making and risk underestimation.
Engagement Question: How might overconfidence affect leaders in business or politics? Can you recall a situation where you were overconfident? What happened?
Coincidence Error
Refers to mistakenly perceiving order in random events.
Example: “The dice must be fixed because you rolled three sixes in a row.”
Engagement Question: Can you think of a time when you have fallen into this mindset?
Empirical Investigation
Definition: Gathering observable, measurable evidence.
Foundation of the scientific method; involves controlled experiments, surveys, and observations.
Engagement Question: How might empirical investigation help overcome hindsight bias and overconfidence?
Applying the Scientific Attitude in Action
Combine curiosity, skepticism, and critical thinking in daily life.
Apply empirical investigation to test beliefs and assumptions.
Be open to changing one’s mind when presented with new evidence.
3 Sample Size: Random Sample, Stratified Sampling
Sample Size
Importance: Sampling saves time by providing insights without needing to examine the entire population.
Example: Finding ratios in a mixed jar by taking a well-mixed, random sample.
Engagement Question: What do you think would be a good sample size for surveying your school? Why?
Random Sampling
Provides equal chances for every member of a population to be selected.
Example: Using a computer to randomly select 100 names from a list of 1000 students.
Engagement Question: Can you think of situations where random sampling might not yield the most accurate results?
Stratified Sampling
Involves dividing the population into subgroups (strata), ensuring better representation.
Example: Surveying equal numbers of freshmen, sophomores, juniors, and seniors proportionately.
Engagement Question: How might stratified sampling be useful in political polling?
4 Correlation-Causation: Positive Correlation, Negative Correlation
What is Correlation?
Definition: Measures how two variables change or relate to each other.
Important Note: Correlation does not imply causation.
Discussion: When might correlation imply causation? Example: Smoking and lung cancer.
Engagement Question: Can you think of two things that might be correlated in your daily life?
Positive vs Negative Correlation
Positive Correlation: As one variable increases, the other also increases.
Example: Height vs. shoe size.
Negative Correlation: As one variable increases, the other decreases.
Example: Temperature vs. coat sales.
Engagement Question: Can you think of other examples of positive and negative correlations?
Correlation ≠ Causation
Just because two things are correlated doesn’t mean one causes the other.
Example: Ice cream sales and drowning incidents, both increase in summer due to higher temperatures.
Engagement Question: What are some other correlation-causation relationships you have heard about?
Drawing Conclusions from Data
Look for patterns, but be cautious about assumptions.
Consider alternative explanations and potential third variables.
5 Ethics in Research
Key Ethical Principles in Research
Informed Consent: Participants must be aware they are involved in research and give consent.
Confidentiality: Privacy must be protected.
Risk: Participants cannot be placed under significant mental or physical harm.
Debriefing: Afterwards, participants should be told about the purpose of the study.
Modern Ethical Dilemmas in Research
Gene Editing: Where should we draw the line?
Animal Testing: Used for medicines and other products.
Social Media Research: Balancing data access with user consent.
Conflict of Interest: Financial or personal interests can influence research outcomes; example: company-sponsored research.
The Tuskegee Syphilis Study: An Ethical Failure
Conducted from 1932-1972 on African American men with syphilis.
Researchers withheld treatment even after penicillin became available.
Violated informed consent principles, leading to significant reforms in research ethics and regulations.
The Milgram Obedience Experiment
Studied participants' willingness to obey authority figures.
Participants believed they were administering electric shocks to others.
Raised ethical concerns about psychological harm and deception in research.
6 Studying Memory
What is Memory?
Definition: Memory refers to the persistence of learning over time through storage and retrieval of information and skills.
Analogy: Memory explained as the brain's filing system.
Engagement Question: Can you think of a recent memory? How did you form it? Think, Pair, Share.
Recognition vs. Recall
Recognition: Identifying something you've encountered before (e.g., multiple choice questions).
Example: Recognizing a friend's face in a crowd.
Recall: Retrieving information from memory without cues (e.g., fill in the blank).
Example Set of Names: Grouchy, Droopy, Pop; Gabby, Dopey, Grumpy; etc.
Relearning: Strengthening Memory
Definition: Process of learning something again, usually faster than the first time.
Example: Reviewing material before a test can reinforce and strengthen memories.
Engagement Question: Can you think of times you have used relearning in your life?
How Does Memory Work?
Encoding: The process of getting information into our brains allowing for storage.
Storage: Holding the information in a way that it can be retrieved later.
Retrieval: Reactivating and recalling the information, producing it similarly to the encoding.
The Penny Test
Recognition Test: Which of these has the design of an actual U.S. cent?
Engagement Question: Why do you think we struggled to pick out the correct penny?
What is Sensory Memory?
Definition: Sensory memory is the earliest stage, holding sensory information momentarily (less than a second).
Function: Allows the brain to process and filter incoming information.
The Role of Sensory Memory in Encoding
Types of Sensory Memory: Iconic (vision), echoic (hearing), haptic (touch), olfactory (smell), gustation (taste).
Duration: Image memory lasts for about 1/20th of a second; echo lasts for 3-4 seconds.
Function: Sorted into either being discarded or moved forward to short-term memory.
7 Building Memory and Storage
Short-Term Memory and the Magic Number 7
Duration: Holds information for about 20-30 seconds, typically storing 7 (plus or minus 2) items—known as Miller's magic number.
Example: Remembering a phone number long enough to dial it.
Engagement Question: Can you think of other examples where you use short-term memory?
Working Memory
Involves rehearsal, focus, analysis, and linking; leading to longer-term storage.
Greater capacity than short-term memory.
Examples: Reading comprehension, solving math problems, following directions.
Chunking: Grouping Information
Definition: Grouping information into meaningful units for easier memorization.
Example: Memorizing:
ACPCVSSUVROFLNBAQ
Assembled: XIDK KFC FBI BANAACP CVSS UVRO FNBAQ
Mnemonic Devices: Memory Helpers
Definition: Tricks to aid memory retention; can include acronyms, rhymes, and visual associations.
Examples:
"ROY G. BIV" for colors of the rainbow.
"Every Good Boy Does Fine" for musical notes.
Engagement Question: What mnemonic devices have you used?
The Method of Loci: Memory Palace
Definition: Associations of information with familiar locations.
Retrieval technique involves mentally walking through the "memory palace."
Engagement Question: How might you use this method for remembering homework assignments?
8 Memory Retrieval
Explicit Memory: Conscious Recollection
Definition: Involves conscious and intentional remembering of facts, stories, and experiences.
Brain Involvement: Retrieval and use directed by frontal lobes; encoding/storage facilitated by the hippocampus. Events and facts are held here for a few days before consolidation for long-term storage.
Implicit Memory: Unconscious Recall
Definition: Automatic, unconscious remembering; involves storing reactions and skills.
Brain Involvement: The cerebellum forms and stores conditioned responses (e.g., riding a bike).
Engagement Question: Can you think of a skill that feels automatic? How did practice affect this?
Infantile Amnesia
Definition: Reason why explicit memories only generally go back to age 3 for most people.
Retention: Implicit memory from infancy can be retained, including skills and conditioned responses.
Reasons for Amnesia: Brain development (hippocampus still maturing) affects encoding.
Memory Processing
Explicit Memories (Declarative): With conscious recall, processed in the hippocampus and frontal lobes.
Includes facts and events (e.g., personal experiences).
Implicit Memories (Nondeclarative): Without conscious recall, processed in the cerebellum and basal ganglia.
Includes motor and cognitive skills (e.g., riding a bike).
Classical conditioning reactions.
9 Memory Retrieval Part 2
How Do Emotions Affect Memory?
Emotions' Impact: Strong emotions, particularly stress, can enhance memory formation.
Flashbulb Memories: Refers to emotionally intense events that create vivid, seemingly accurate memories.
Note: Such memories are not as accurate as perceived; they may have historically helped in survival.
Stress Hormones and Memory: The Amygdala Connection
Process:
Emotions can trigger a rise in stress hormones.
These hormones activate the amygdala, which increases memory-forming activity.
The amygdala engages frontal lobes and basal ganglia to tag memories as important, leading to detailed sensory and emotional retention.
Implications: Memories can be recalled rapidly or intrusively, particularly in traumatized individuals.
Long Term Potentiation (LTP)
Definition: Strengthening of neural connections through repeated stimulation.
Example: Learning a new skill, such as playing a musical instrument.
Factors Affecting LTP: Positive:
Sleep, stimulating positive environments, diet, and exercise.
Factors Affecting LTP: Negative:
Chronic stress, lack of sleep, drug abuse, aging.
Messing with Long-Term Potentiation
Chemicals and negative factors may prevent LTP, inhibiting learning and erasing recent memories.
Example: Mice forget how to run a maze if LTP is blocked.
Link to Learning: Drugs that enhance LTP can help with maze learning.
Serial Position Effect
Definition: The tendency to recall the first (primacy effect) and last items (recency effect) when learning long lists. How many presidents can you recall?
10 Language
What is Language?
Definition: A system for communicating ideas and feelings, which emerged 50,000 to 100,000 years ago.
Historical Context: Earliest written language developed 3-5 thousand years ago; allowed for recording history and bridging understanding between people.
The Building Blocks of Language
Phonemes: Basic units of sound (e.g., the "b" in "bat").
Morphemes: Smallest units of meaning (e.g., “un-” in "unhappy").
Grammar: Set of rules for combining words and phrases.
Language Development Process
Vocabulary Growth: Average acquisition of 10 new words daily between ages 2-18.
Grammar Learning: Children grasp basic grammar before mastering simple arithmetic.
Observation: Children often overgeneralize language rules (e.g., "I am going to broom the floor").
Critical Periods in Language Development
Language exposure must begin early for proper brain development.
Language centers may fail to develop properly if not introduced by age seven.
Example: Genie Wiley’s case highlights critical period importance.
Language and the Brain
Broca's Area: Associated with speech production located at the front left of the brain; damage can cause Broca’s aphasia (difficulty speaking fluently).
Wernicke's Area: Involved in language comprehension located at the back left of the brain; damage can cause Wernicke’s aphasia (difficulty comprehending speech).
Implications: How might these damages affect daily life?
How Language Influences Thought
Linguistic Determinism/Linguistic Relativity: Language shapes thought and perception.
Example: Benjamin Whorf proposed that the Hopi language lack of past tense forms influences thoughts about the past.
Engagement Question: What advantages might exist to being bilingual?
11 Theories of Intelligence
Defining Intelligence
Definition: The ability to learn from experience, solve problems and adapt knowledge to new situations.
General Intelligence: The g Factor
Concept: Introduced by psychologist Charles Spearman in 1904; posits a single general intelligence that influences mental abilities.
Suggests individuals good at one mental task tend to excel at others.
Consideration: Implications of general intelligence on education.
Howard Gardner's Theory of Multiple Intelligences
Proposed 8 distinct types of intelligence reflecting varied human capabilities:
Linguistic
Logical-Mathematical
Spatial
Musical
Bodily-Kinesthetic
Interpersonal
Intrapersonal
Naturalistic.
Engagement Question: Which of these intelligences do you believe is your strongest? How might understanding multiple intelligences change teaching and learning?
Exploring the 8 Multiple Intelligences
Basic Descriptions of Intelligences:
Linguistic: Word smart (writers, speakers)
Logical-Mathematical: Number/reasoning smart (scientists, engineers)
Spatial: Picture smart (artists, architects)
Musical: Music smart (composers, singers)
Bodily-Kinesthetic: Body smart (athletes, dancers)
Interpersonal: People smart (teachers, salespeople)
Intrapersonal: Self-smart (philosophers, psychologists)
Naturalistic: Nature smart (biologists, environmentalists)
Savant Syndrome
Definition: Refers to individuals who possess isolated areas of high abilities amidst overall below-average functioning.
Often showcases extraordinary memory, artistic, or calculation skills.
Example: Kim Peek, the inspiration for the movie "Rain Man."
12 Attachment/Parenting Styles
Social Development: Attachment
Definition: Attachment encompasses emotional ties to others; in children, it manifests as a need for closeness to caregivers.
Origins of Attachment:
Harry Harlow’s monkey experiments suggested attachment is based on physical affection and comfort, not food reward.
Attachment Variation: Mary Ainsworth's Findings
Based on the “strange situations” test, attachment styles observed include:
Secure attachment (60-65%): Distress when mother leaves, seeks contact upon return.
Insecure-avoidant attachment (20%): Avoids caregiver, shows little distress.
Insecure ambivalent attachment (10-15%): Clingy; distress upon separation; mixed reactions upon reunion.
Disorganized (5-10%): Displays inconsistent patterns of behavior.
Deprivation of Attachment
Children without nurturing caretaking may still be resilient but can suffer from:
Difficulty forming attachments.
Increased anxiety and depression.
Lowered intelligence.
Increased aggression.
Parenting Styles: Diana Baumrind's Types
Authoritative: Sets rules and explains them, listening to children's concerns.
Authoritarian: Insists on rules without discussion or exceptions.
Permissive Parenting: Allows child to set rules and prioritizes preferences over structure.
Neglectful (Uninvolved): Indifferent to rules and largely uninvolved in daily activities.
13 Teenage Identity
Adolescent Brain Development
Changes during puberty include:
Remodeling for specialization.
Reinforcement of frequently used connections (rewiring).
Cutting out unneeded connections (pruning).
Concept: Myelin coating improves nerve conduction speed, facilitating faster processing and learning during optimal times.
The Changing Teenage Brain
Frontal lobes are last to rewire, while the emotional limbic system develops earlier in puberty.
Teens may understand risks but often engage in risk-taking behaviors due to a developed mental "accelerator" that overcomes rational thinking.
Engagement Question: Can you recall instances where impulsive thinking bypassed logical thoughts?
James Marcia's Identity Statuses
Identified four identity statuses in adolescents:
Identity Diffusion: No exploration or commitment (e.g., not considering future career).
Identity Foreclosure: Commitment without exploration (e.g., following parents' career choices).
Identity Moratorium: Exploration occurs, but no commitment made (e.g., trying different interests).
Identity Achievement: Exploration culminates in commitment (e.g., career choice after research).
Engagement Question: Which status might you currently be in? Why?
Imaginary Audience & Personal Fable
Part of adolescent egocentrism leading to:
Imaginary Audience: Feeling constantly observed or judged by others.
Personal Fable: Belief in the uniqueness of one’s experiences, leading to exaggerated self-consciousness.
Examples: “Everyone will notice my bad haircut.” “No one understands my heartbreak.”
14 Adulthood
Adult Physical Development
Peak in physical abilities reaches in mid-20s, including:
Muscular strength.
Cardiac output.
Reaction time.
Sensory sensitivity.
Physical Changes in Middle Adulthood (40-65 years)
End of reproductive years; gradual decline in sexual activity.
Around age 50, women enter menopause, ending reproductive capabilities.
Visual and Auditory Changes
Vision: Decrease in acuity and brightness perception.
Hearing: Loss primarily in higher frequencies.
Motor Abilities: Decline in reaction times and motor skills;
Slower neural processing speeds.
Social Development in Adulthood
The “midlife crisis” is not age-specific; triggers include significant illnesses, divorce, job loss, or parenting challenges.
Psychosocial Development in Adulthood
While the midlife crisis may not relate to age, individuals feel pressured by a societal "social clock“ regarding achievement expectations.
Health and Immunity Changes in Adulthood
Negative Impact: Decline in immune function with age, making it harder to combat serious illnesses.
Positive Aspect: Lifetime accumulation of antibodies aids in fighting off minor illnesses (e.g., colds).
Slowing the Aging Process
Exercise Benefits:
Builds muscles and bones.
Stimulates neurogenesis (growth of new neurons) in the hippocampus.
Maintains telomeres (chromosome ends) enhancing cellular health.
Improves cognitive functions and reduces the risk of dementia.
Engagement Question: What longevity secrets have you heard?
Alzheimer's Disease and Other Dementias
Reality Check: Dementia, including Alzheimer’s, is not a “normal” part of aging.
Common Symptoms:
Decreased ability to recall recent events and names.
Emotional unpredictability; flat emotions followed by uninhibited behaviors and anger.
Confusion, disorientation, leading to eventual inability to communicate or think.
Neurobiological Changes:
Plaque buildup (abnormal protein deposits) between brain cells.
Tangle formation (twisted Tau proteins inside cells) disrupts functions.
Neuronal death resulting in brain atrophy.