🔬 3.1 Themes & Methods in Developmental Psychology
Developmental psychology studies how people grow, change, and remain the same across the lifespan — from conception to death. Several core debates drive the field:
Major Themes
Nature vs. Nurture: Are our traits determined primarily by genetics (nature) or by experience and environment (nurture)? Modern psychology recognizes the interaction of both.
Continuity vs. Stages: Does development occur as a gradual, continuous process (like growing taller) or in distinct stages (like a caterpillar becoming a butterfly)?
Stability vs. Change: Do our early personality traits persist throughout life, or do we change significantly as we age?
Research Methods in Developmental Psychology
Cross-Sectional Study: Compares different age groups at the same point in time. Fast and inexpensive, but differences may reflect cohort effects (generational differences) rather than age-related changes.
Longitudinal Study: Follows the same group of people over an extended period. Tracks real change over time, but is expensive, time-consuming, and participants may drop out (attrition).
Cross-Sequential Study: Combines both methods — follows multiple age groups over time. Helps separate age effects from cohort effects.
Prenatal Development
Development begins at conception and progresses through three prenatal stages:
Germinal Stage (Weeks 0–2) The fertilized egg (zygote) divides rapidly and implants in the uterine wall.
Embryonic Stage (Weeks 3–8) Major organs and body systems form. The developing organism is called an embryo. This is the most vulnerable period for teratogens.
Fetal Stage (Week 9–Birth) The fetus grows rapidly, organs mature, and movement begins. By month 6, the fetus is viable outside the womb.
Teratogens are harmful agents (alcohol, drugs, viruses, chemicals) that can cause birth defects. Fetal Alcohol Spectrum Disorders (FASD) result from maternal alcohol use during pregnancy.
Key Takeaway: Developmental psychology explores how nature and nurture interact across the lifespan. Know the three prenatal stages, teratogens, and the difference between cross-sectional and longitudinal research designs.
🧒 3.2 Physical Development Across the Lifespan
Infancy and Childhood
Newborns are born with reflexes: rooting (turning toward touch on cheek), sucking, grasping (Palmar reflex), Moro reflex (startling), and Babinski reflex (toe fanning).
Motor development follows a predictable sequence: lift head → roll over → sit → crawl → stand → walk (typically by 12–15 months). This is largely maturation (biological growth) rather than learning.
The brain develops rapidly: at birth, ~100 billion neurons are present. Synaptic pruning eliminates unused neural connections, strengthening the ones that are used ("use it or lose it").
Critical periods are time windows when certain experiences must occur for normal development (e.g., vision, language).
Sensitive periods are broader windows when the brain is especially receptive to certain experiences but development can still occur later.
Adolescence
Puberty: The period of rapid physical maturation triggered by hormones, leading to reproductive capability. Onset varies (typically ages 10–14).
The prefrontal cortex (responsible for planning, impulse control, and decision-making) is the last brain area to fully mature — not until the mid-20s. This helps explain adolescent risk-taking behavior.
Primary sex characteristics (reproductive organs) and secondary sex characteristics (body hair, voice changes, breast development) develop during puberty.
Adulthood and Aging
Physical peak occurs in the mid-20s; gradual decline follows.
Menopause (typically ages 45–55): cessation of menstruation and decline in estrogen.
Sensory abilities (vision, hearing) decline with age.
Neurodegeneration: Diseases like Alzheimer's involve progressive loss of brain cells, affecting memory and cognition.
Crystallized intelligence (accumulated knowledge) tends to increase or remain stable with age, while fluid intelligence (abstract reasoning, processing speed) declines.
🧰 Key Reflexes at Birth
Rooting
Turn head toward touch on cheek
Sucking
Suck on objects placed in mouth
Grasping
Grip finger placed in palm
Moro
Startle reflex — arms fling out
Babinski
Toes fan out when sole stroked
Key Takeaway: Physical development follows a predictable sequence driven by maturation. The brain undergoes rapid growth and synaptic pruning in childhood, the prefrontal cortex matures last (mid-20s), and aging brings declines in fluid intelligence and sensory abilities.
🏳️ 3.3 Gender and Sexual Orientation
Gender development is influenced by biology, social learning, and cognitive processes.
Key Terminology
Sex: Biological classification (male, female, intersex) based on chromosomes, hormones, and anatomy.
Gender: The socially constructed roles, behaviors, and identities associated with being masculine, feminine, or other identities.
Gender Identity: A person's internal sense of their own gender.
Gender Roles: Cultural expectations about how males and females should behave.
Transgender: A person whose gender identity differs from their sex assigned at birth.
Perspectives on Gender Development
Biological Perspective: Prenatal hormones (especially androgens and estrogens) influence brain development and gender-typed behavior. Evolutionary psychology suggests some gender differences have adaptive origins.
Social Learning Theory (Bandura): Children learn gender roles through observation, imitation, and reinforcement. Parents, peers, and media model gender-appropriate behavior.
Gender Schema Theory (Sandra Bem): Children develop gender schemas — mental frameworks for organizing information about what is "masculine" and "feminine" — and filter their experiences through these schemas.
Kohlberg's Gender Development: Children progress through stages: gender identity (age ~2–3), gender stability (age ~4), and gender constancy (age ~6–7).
Sexual Orientation
Sexual orientation refers to a person's enduring pattern of emotional, romantic, and/or sexual attraction.
Research suggests sexual orientation has a biological basis: genetic factors, prenatal hormone exposure, and brain structure differences all play a role.
Sexual orientation exists on a continuum and is not a choice.
Key Takeaway: Gender development involves biology, social learning, and cognitive schemas. Know the difference between sex and gender, social learning theory, and gender schema theory.
🧠 3.4 Cognitive Development Across the Lifespan
Jean Piaget's Theory of Cognitive Development
Piaget proposed that children actively construct their understanding of the world through schemas (mental frameworks), which they modify through:
Assimilation: Interpreting new experiences in terms of existing schemas (e.g., a child calls all four-legged animals "doggy").
Accommodation: Modifying existing schemas to incorporate new information (e.g., learning that cats are different from dogs).
Piaget's Four Stages
Stage
Age
Key Features
Sensorimotor
0–2 years
Learn through senses and motor actions. Develop object permanence (understanding that objects exist even when hidden). Lack symbolic thinking.
Preoperational
2–7 years
Develop language and pretend play. Egocentrism (difficulty seeing others' perspectives). Lack conservation (understanding that quantity stays the same despite appearance changes).
Concrete Operational
7–11 years
Master conservation and logical thinking about concrete events. Can classify objects and understand reversibility. Still struggle with abstract/hypothetical reasoning.
Formal Operational
12+ years
Abstract thinking, hypothetical reasoning, and systematic problem-solving emerge. Can think about thinking (metacognition).
Piaget's adaptation process: new experiences are either assimilated into existing schemas or require accommodation (Wikimedia Commons, CC BY-SA 3.0)
Lev Vygotsky's Sociocultural Theory
Emphasized the role of social interaction and culture in cognitive development.
Zone of Proximal Development (ZPD): The gap between what a child can do alone and what they can do with guidance from a more knowledgeable other (MKO).
Scaffolding: Temporary support provided by a teacher or more skilled peer that is gradually removed as the child masters the task.
Criticisms and Updates
Piaget may have underestimated children's abilities (e.g., infants show object permanence earlier than he thought).
Development may be more continuous than stage-like.
Vygotsky placed more emphasis on cultural context than Piaget, whose stages were considered more universal.
Key Takeaway: Piaget's four stages (sensorimotor, preoperational, concrete operational, formal operational) describe qualitative shifts in thinking. Vygotsky emphasized social interaction and the ZPD. Know assimilation, accommodation, object permanence, egocentrism, and conservation.
💬 3.5 Communication and Language Development
Language is one of the most remarkable cognitive achievements. Children follow a predictable sequence:
Milestones of Language Development
Age
Milestone
Example
~2 months
Cooing
Vowel-like sounds: "ooh," "aah"
~4–6 months
Babbling
Consonant-vowel combos: "ba-ba," "da-da" (universal across cultures)
~10–12 months
One-word stage (holophrases)
"Mama," "milk" — single words convey whole thoughts
Rapid vocabulary explosion; begin forming full sentences
Theories of Language Acquisition
B.F. Skinner — Learning Theory: Language is acquired through operant conditioning — reinforcement (praise), shaping, and imitation. Parents reward correct speech and correct errors.
Noam Chomsky — Nativist Theory: Humans are born with an innate Language Acquisition Device (LAD) — a biological predisposition to learn language. Evidence: children worldwide follow similar milestones, produce grammatically correct sentences they've never heard before (overgeneralization: "I goed to the store"), and there is a critical period for language acquisition.
Interactionist Perspective: Language develops through the interaction of biological readiness and social environment. Children need both an innate capacity and social input to develop language.
Key Concepts
Linguistic Determinism (Sapir-Whorf Hypothesis): Language shapes how we think and perceive the world. The strong version (language determines thought) is largely rejected; the weak version (language influences thought) is supported.
Bilingualism: Learning multiple languages enhances cognitive flexibility, executive function, and may delay cognitive decline in aging.
Key Takeaway: Language develops through a predictable sequence (cooing → babbling → one-word → telegraphic → sentences). Know Skinner (learning theory) vs. Chomsky (LAD/nativist) and the critical period for language.
🤗 3.6 Social-Emotional Development Across the Lifespan
Attachment Theory (John Bowlby & Mary Ainsworth)
Attachment is the deep emotional bond between infant and caregiver, crucial for healthy social-emotional development.
Bowlby: Proposed that attachment is an innate, adaptive behavior. Infants are biologically programmed to form attachments for survival.
Harlow's Monkey Studies: Demonstrated that comfort (contact comfort) is more important than food in forming attachment. Infant monkeys preferred a soft cloth "mother" over a wire one with food.
Ainsworth's Strange Situation: A laboratory procedure to assess attachment styles:
Attachment Style
Behavior
Secure (~60%)
Distressed when caregiver leaves, happy when they return. Uses caregiver as a secure base for exploration.
Anxious-Ambivalent/Resistant (~10%)
Very distressed when caregiver leaves, ambivalent (both seeking and resisting contact) when they return.
Avoidant (~20%)
Shows little distress when caregiver leaves and avoids contact when they return.
Disorganized (~10%)
Inconsistent, confused behavior; may freeze or show contradictory responses. Often associated with abuse/neglect.
Erik Erikson's Psychosocial Development (8 Stages)
Erikson proposed that personality develops through eight psychosocial crises, each involving a conflict between two opposing outcomes:
Stage
Age
Crisis
Key Question
1
Infancy (0–1)
Trust vs. Mistrust
"Is the world safe and reliable?"
2
Toddlerhood (1–3)
Autonomy vs. Shame/Doubt
"Can I do things myself?"
3
Preschool (3–6)
Initiative vs. Guilt
"Is it okay for me to act on my own?"
4
School Age (6–12)
Industry vs. Inferiority
"Am I competent?"
5
Adolescence (12–18)
Identity vs. Role Confusion
"Who am I?"
6
Young Adult (18–40)
Intimacy vs. Isolation
"Can I form close relationships?"
7
Middle Adult (40–65)
Generativity vs. Stagnation
"Am I contributing to the next generation?"
8
Late Adult (65+)
Integrity vs. Despair
"Did I live a meaningful life?"
Kohlberg's Moral Development
Lawrence Kohlberg proposed three levels of moral reasoning, each with two stages:
Preconventional Stage 1: Obedience & punishment ("I'll get in trouble") Stage 2: Self-interest ("What's in it for me?")
Conventional Stage 3: Good interpersonal relationships ("I want approval") Stage 4: Maintaining social order ("It's the law")
Postconventional Stage 5: Social contract ("Rules should serve the greater good") Stage 6: Universal ethical principles ("Justice above the law")
Parenting Styles (Diana Baumrind)
Style
Warmth
Control
Outcome
Authoritative
High
High
Best outcomes: high self-esteem, self-reliance, social competence
Authoritarian
Low
High
Obedient but may have lower self-esteem, more anxiety
Permissive
High
Low
May be immature, lack self-discipline
Uninvolved (Neglectful)
Low
Low
Poorest outcomes: low competence, self-esteem, and attachment
Key Takeaway: Know Ainsworth's attachment styles (secure, anxious, avoidant, disorganized), Erikson's 8 psychosocial stages, Kohlberg's 3 levels of moral development, and Baumrind's 4 parenting styles.
🐕 3.7 Classical Conditioning
Classical conditioning (Ivan Pavlov) is a type of learning in which a neutral stimulus becomes associated with a stimulus that naturally produces a response, so that the neutral stimulus eventually produces the response on its own.
Pavlov's Key Experiment
Pavlov discovered classical conditioning while studying digestion in dogs. He noticed that dogs began salivating not just to food, but to stimuli associated with food (like the lab assistant's footsteps).
Key Terms
Unconditioned Stimulus (US): A stimulus that naturally and automatically triggers a response (e.g., food).
Unconditioned Response (UR): The natural, unlearned response to the US (e.g., salivation to food).
Neutral Stimulus (NS): A stimulus that initially produces no relevant response (e.g., a bell).
Conditioned Stimulus (CS): The previously neutral stimulus that, after association with the US, triggers a conditioned response (e.g., bell after pairing with food).
Conditioned Response (CR): The learned response to the CS (e.g., salivation to the bell alone).
Classical Conditioning Processes
Acquisition: The initial learning phase when the NS is repeatedly paired with the US.
Extinction: The CR weakens when the CS is presented repeatedly without the US.
Spontaneous Recovery: After extinction, the CR may reappear after a rest period when the CS is presented again.
Generalization: The tendency to respond to stimuli similar to the CS (e.g., salivating to a similar-sounding bell).
Discrimination: The ability to distinguish between the CS and similar stimuli that do not signal the US.
Pavlov's salivary conditioning experiments with dogs (Wellcome Collection, CC BY 4.0)
Real-World Applications
John B. Watson & Little Albert (1920): Conditioned a baby to fear a white rat by pairing it with a loud noise. Demonstrated that phobias can be classically conditioned.
Taste Aversions (Garcia Effect): One-trial learning where nausea paired with a specific food creates a lasting aversion. This challenged the idea that any NS can become a CS for any UR (biological preparedness).
Systematic Desensitization (Joseph Wolpe): A therapy technique using counterconditioning to treat phobias by pairing relaxation with feared stimuli.
Operant conditioning (B.F. Skinner) is learning in which behavior is strengthened or weakened by its consequences. Unlike classical conditioning (which involves involuntary responses), operant conditioning involves voluntary behavior.
Edward Thorndike — Law of Effect
Thorndike's Law of Effect states that behaviors followed by satisfying consequences are more likely to be repeated, while behaviors followed by unpleasant consequences are less likely to be repeated. This laid the groundwork for Skinner's work.
Skinner's Key Concepts
Concept
Definition
Effect on Behavior
Example
Positive Reinforcement
Adding a pleasant stimulus
Increases behavior
Giving a treat for studying
Negative Reinforcement
Removing an unpleasant stimulus
Increases behavior
Taking aspirin removes headache pain → more likely to take aspirin
Secondary (Conditioned) Reinforcers: Gain value through association with primary reinforcers (money, grades, praise).
Token Economy: A system using secondary reinforcers (tokens) that can be exchanged for rewards. Used in schools, psychiatric hospitals.
Key Takeaway: Operant conditioning uses consequences (reinforcement and punishment) to modify voluntary behavior. Know the four types of reinforcement/punishment, the four schedules of reinforcement (especially variable-ratio), shaping, and primary vs. secondary reinforcers.
🧠 3.9 Social, Cognitive & Neurological Factors in Learning
Observational Learning (Albert Bandura)
Bandura demonstrated that people learn by watching and imitating others (models), not just through direct reinforcement. This is also called social learning or modeling.
Bandura's Bobo Doll Experiment (1961)
Children who watched an adult aggressively hit a Bobo doll were significantly more likely to imitate the aggressive behavior compared to children who watched a non-aggressive adult or no model. This showed that:
Learning can occur through observation alone, without direct reinforcement.
Children are more likely to imitate models who are rewarded (vicarious reinforcement) and less likely to imitate models who are punished (vicarious punishment).
Four Steps of Observational Learning
Attention: You must pay attention to the model's behavior.
Retention: You must remember (encode) what you observed.
Reproduction: You must be able to replicate the behavior.
Motivation: You must have a reason to perform the behavior (expected reinforcement).
Mirror Neurons
Mirror neurons fire both when an animal performs an action and when it observes the same action performed by another. These neurons may provide a biological basis for observational learning, empathy, and understanding others' actions.
🎭 Bandura's Bobo Doll Experiment
Children watched an adult model interact with a Bobo doll
Aggressive group: Adult punched, kicked, and yelled at the doll
Non-aggressive group: Adult played calmly
Children left alone with the doll
Result: Children who saw aggression imitated it significantly more
This proved learning occurs through observation alone, without direct reinforcement.
Cognitive Factors in Learning
Latent Learning (Edward Tolman): Learning that occurs without reinforcement and is not demonstrated until there is a reason to demonstrate it. Tolman's rats formed cognitive maps (mental representations of a maze) even without reward, and performed well once a reward was introduced.
Insight Learning (Wolfgang Köhler): Sudden realization of how to solve a problem without trial-and-error. Köhler's chimpanzees stacked boxes to reach bananas.
Learned Helplessness (Martin Seligman): When an organism has learned that it cannot escape from a painful situation, it stops trying — even when escape becomes possible. Has implications for understanding depression.
Biological Constraints on Learning
Biological Preparedness: Organisms are biologically predisposed to learn certain associations more easily than others (e.g., taste aversions form more easily than bell-shock associations for food).
Instinctive Drift: The tendency of an animal to revert to instinctive behaviors that interfere with conditioned responses (e.g., a raccoon "washing" coins instead of depositing them).
Key Takeaway: Bandura's Bobo doll experiment showed observational learning. Know the four steps of observational learning, mirror neurons, latent learning (Tolman), insight learning (Köhler), learned helplessness (Seligman), and biological constraints on learning.
📚 Important Vocabulary
Term
Definition
Teratogen
A harmful agent (drug, virus, chemical) that can cause birth defects during prenatal development.
Maturation
The biological growth process that enables orderly changes in behavior, relatively uninfluenced by experience.
Critical Period
A time window during which certain experiences must occur for normal development.
Schemas
Mental frameworks or concepts that organize and interpret information (Piaget).
Assimilation
Interpreting new experiences in terms of existing schemas.
Accommodation
Modifying existing schemas to incorporate new information.
Object Permanence
The understanding that objects continue to exist even when they cannot be seen (develops in sensorimotor stage).
Egocentrism
The inability to see a situation from another person's perspective (preoperational stage).
Conservation
The understanding that quantity remains the same despite changes in shape or appearance.
Zone of Proximal Development
The gap between what a learner can do alone and what they can do with guidance (Vygotsky).
Scaffolding
Temporary support from a more knowledgeable person, gradually removed as the learner gains competence.
Attachment
The deep emotional bond between an infant and caregiver, essential for healthy development.
Secure Attachment
Attachment style where the child uses the caregiver as a safe base; distressed when caregiver leaves, happy upon return.
Authoritative Parenting
Parenting style combining high warmth and high control; associated with the best developmental outcomes.
Erikson's Psychosocial Stages
Eight stages of development, each involving a crisis between two opposing outcomes (e.g., trust vs. mistrust).
Identity vs. Role Confusion
Erikson's adolescent stage: developing a sense of self and personal identity.
Kohlberg's Moral Development
Three levels of moral reasoning: preconventional (self-interest), conventional (social norms), postconventional (universal principles).
Language Acquisition Device (LAD)
Chomsky's proposed innate biological mechanism that enables children to acquire language.
Telegraphic Speech
Two-word stage of language development using mainly nouns and verbs ("want cookie").
Unconditioned Stimulus (US)
A stimulus that naturally and automatically triggers a response without prior learning.
Conditioned Stimulus (CS)
A previously neutral stimulus that, after pairing with a US, comes to trigger a conditioned response.
Conditioned Response (CR)
A learned response to a conditioned stimulus.
Extinction
The weakening of a conditioned response when the CS is repeatedly presented without the US.
Spontaneous Recovery
The reappearance of an extinguished conditioned response after a rest period.
Generalization
The tendency to respond to stimuli similar to the conditioned stimulus.
Positive Reinforcement
Adding a pleasant stimulus to increase a behavior.
Negative Reinforcement
Removing an unpleasant stimulus to increase a behavior.
Positive Punishment
Adding an unpleasant stimulus to decrease a behavior.
Negative Punishment
Removing a pleasant stimulus to decrease a behavior.
Shaping
Reinforcing successive approximations of a desired behavior.
Variable-Ratio Schedule
Reinforcement after an unpredictable number of responses; produces highest, most consistent response rate.
Observational Learning
Learning by watching and imitating the behavior of others (Bandura).
Mirror Neurons
Neurons that fire both when performing an action and when observing the same action in another; linked to empathy and imitation.
Latent Learning
Learning that occurs without reinforcement and is not demonstrated until there is motivation to do so (Tolman).
Cognitive Map
A mental representation of a physical space or layout (Tolman's rats).
Learned Helplessness
A condition in which an organism learns to be passive after repeated exposure to uncontrollable events (Seligman).
Biological Preparedness
The idea that organisms are biologically predisposed to learn certain associations more easily (e.g., taste aversions).
✍️ Practice Multiple-Choice Questions
Test your knowledge with 25 AP-style questions. Click "Show Answer" to reveal the correct answer and explanation.
1. A researcher wants to study how memory changes from age 20 to age 60. She tests groups of 20-, 30-, 40-, 50-, and 60-year-olds all at the same time. This is an example of a:
A) Longitudinal study
B) Cross-sectional study
C) Case study
D) Cross-sequential study
Answer: B) A cross-sectional study compares different age groups at the same point in time. It is faster and cheaper than longitudinal studies but may be affected by cohort effects.
2. During which prenatal stage is the developing organism MOST vulnerable to teratogens?
A) Germinal stage
B) Fetal stage
C) Embryonic stage
D) Third trimester
Answer: C) The embryonic stage (weeks 3-8) is the most critical period for teratogen exposure because major organs and body systems are forming during this time.
3. A child sees a cow for the first time and calls it a "big doggy." According to Piaget, this child is demonstrating:
A) Accommodation
B) Assimilation
C) Object permanence
D) Conservation
Answer: B) Assimilation occurs when a child interprets new information using existing schemas. The child is fitting the cow into their existing "four-legged animal = dog" schema.
4. A 4-year-old child watches as water is poured from a short, wide glass into a tall, thin glass and says there is now "more water." This demonstrates a failure to understand:
A) Object permanence
B) Egocentrism
C) Conservation
D) Reversibility
Answer: C) Conservation is the understanding that quantity remains the same despite changes in appearance. Children in Piaget's preoperational stage (ages 2-7) typically fail conservation tasks.
5. According to Vygotsky, the zone of proximal development refers to:
A) The range of tasks a child can perform independently
B) The gap between what a child can do alone and what they can do with guidance
C) The stage at which abstract thinking develops
D) The critical period for language acquisition
Answer: B) The ZPD is the space between what a learner can do independently and what they can achieve with help from a more knowledgeable other. Scaffolding bridges this gap.
6. In Ainsworth's Strange Situation, a child who shows little distress when the caregiver leaves and avoids contact upon return demonstrates which attachment style?
A) Secure
B) Anxious-ambivalent
C) Avoidant
D) Disorganized
Answer: C) Avoidant attachment is characterized by minimal distress when the caregiver leaves and active avoidance of the caregiver upon return, suggesting the child has learned not to rely on the caregiver.
7. Erikson's stage of "Identity vs. Role Confusion" occurs during:
A) Infancy
B) Early childhood
C) Adolescence
D) Middle adulthood
Answer: C) The identity vs. role confusion stage occurs during adolescence (ages 12-18), when the key task is developing a coherent sense of self and personal identity.
8. A child who says stealing is wrong because "I'll get punished" is reasoning at which level of Kohlberg's moral development?
A) Preconventional
B) Conventional
C) Postconventional
D) Formal operational
Answer: A) Preconventional morality (Stage 1) is based on avoiding punishment and obeying authority. The child's reasoning is focused on the consequences to themselves.
9. Which parenting style is associated with the best developmental outcomes?
A) Authoritarian
B) Permissive
C) Uninvolved
D) Authoritative
Answer: D) Authoritative parenting (high warmth + high control with reasoning) is consistently associated with the best outcomes: high self-esteem, self-reliance, and social competence.
10. Chomsky's Language Acquisition Device (LAD) suggests that:
A) Language is learned entirely through reinforcement
B) Humans have an innate biological capacity for learning language
C) Language can only be learned during adulthood
D) All languages share identical grammar rules
Answer: B) Chomsky proposed that the LAD is an innate, biological mechanism that enables humans to acquire language. Evidence includes universal language milestones and children's ability to produce sentences they've never heard.
11. In Pavlov's experiment, after conditioning, the bell alone caused the dog to salivate. The bell is the:
A) Unconditioned stimulus
B) Unconditioned response
C) Conditioned stimulus
D) Conditioned response
Answer: C) The bell was originally a neutral stimulus. After being repeatedly paired with food (US), it became a conditioned stimulus (CS) that triggered salivation (CR) on its own.
12. After extinction, a conditioned response may reappear when the conditioned stimulus is presented again after a rest period. This is called:
A) Generalization
B) Discrimination
C) Reconditioning
D) Spontaneous recovery
Answer: D) Spontaneous recovery is the reappearance of an extinguished conditioned response after a rest period, suggesting that extinction does not completely erase the learned association.
13. Watson and Rayner's "Little Albert" experiment demonstrated that:
A) Operant conditioning can shape complex behaviors
B) Fears can be classically conditioned in humans
C) Observational learning requires reinforcement
D) Language is innate
Answer: B) Watson and Rayner conditioned Little Albert to fear a white rat by pairing it with a loud noise (US). This showed that emotional responses like fear can be acquired through classical conditioning.
14. Taking an aspirin to relieve a headache is an example of:
A) Positive reinforcement
B) Negative reinforcement
C) Positive punishment
D) Negative punishment
Answer: B) Negative reinforcement involves removing an unpleasant stimulus (headache pain) to increase a behavior (taking aspirin). The removal of pain reinforces the behavior.
15. A slot machine that pays out after an unpredictable number of plays operates on a:
A) Fixed-ratio schedule
B) Variable-ratio schedule
C) Fixed-interval schedule
D) Variable-interval schedule
Answer: B) A variable-ratio schedule reinforces after an unpredictable number of responses. This schedule produces the highest and most consistent rate of responding and is highly resistant to extinction.
16. A teacher gives a gold star to a student each time the student raises their hand before speaking. The gold star is a:
A) Primary reinforcer
B) Secondary (conditioned) reinforcer
C) Negative reinforcer
D) Unconditioned stimulus
Answer: B) A gold star is a secondary (conditioned) reinforcer — it gains its reinforcing value through learned association with primary reinforcers (praise, rewards it can be exchanged for).
B) Children can learn aggressive behavior through observation
C) Punishment is more effective than reinforcement
D) Classical conditioning explains most human behavior
Answer: B) Bandura showed that children who observed an aggressive model were significantly more likely to imitate that aggression, demonstrating that learning can occur through observation without direct reinforcement.
18. Tolman's research with rats running mazes demonstrated the concept of:
A) Operant conditioning
B) Classical conditioning
C) Latent learning and cognitive maps
D) Instinctive drift
Answer: C) Tolman showed that rats who explored a maze without reinforcement had formed cognitive maps (mental representations of the maze). When a reward was introduced, they immediately demonstrated their learning (latent learning).
19. Seligman's learned helplessness research found that animals exposed to inescapable shocks later:
A) Became more aggressive
B) Failed to escape even when escape was possible
C) Developed stronger conditioned responses
D) Showed enhanced problem-solving abilities
Answer: B) Animals that experienced inescapable shocks became passive and failed to escape even when escape was possible. This concept has been applied to understanding human depression.
20. Harlow's monkey experiments showed that infant monkeys preferred the soft cloth "mother" over the wire "mother" with food, demonstrating the importance of:
A) Nutrition over comfort
B) Operant conditioning
C) Contact comfort in attachment
D) Imprinting
Answer: C) Harlow's research demonstrated that contact comfort (physical warmth and softness) is more important than feeding in forming attachment bonds.
21. The prefrontal cortex, which is responsible for impulse control and decision-making, is not fully mature until:
A) Age 12
B) Age 18
C) The mid-20s
D) Age 40
Answer: C) The prefrontal cortex is the last brain area to fully develop, typically not until the mid-20s. This helps explain why adolescents may engage in more risk-taking behavior.
22. Garcia and Koelling's research on taste aversions demonstrated that:
A) Any stimulus can be conditioned to produce any response
B) Organisms are biologically predisposed to form certain associations more easily
C) Extinction cannot occur with taste aversions
D) Operant conditioning is more powerful than classical conditioning
Answer: B) Garcia and Koelling's work on taste aversions showed biological preparedness — organisms are predisposed to associate nausea with taste rather than with sights or sounds, challenging the idea that any NS can become a CS for any UR.
23. Sandra Bem's gender schema theory proposes that children:
A) Learn gender roles entirely through reinforcement
B) Develop mental frameworks that organize information about masculinity and femininity
C) Have no concept of gender until adolescence
D) Inherit gender roles genetically
Answer: B) Gender schema theory proposes that children develop cognitive frameworks (schemas) for understanding what is "masculine" and "feminine" and use these to organize their experiences and behaviors.
24. A dog trained to salivate to a 1000 Hz tone also salivates (though less) to an 800 Hz tone. This demonstrates:
A) Discrimination
B) Extinction
C) Generalization
D) Spontaneous recovery
Answer: C) Generalization is the tendency to respond to stimuli similar to the conditioned stimulus. The dog responds to a similar tone, though the response is weaker than to the original CS.
25. An animal trainer teaches a dolphin to jump through a hoop by first rewarding it for swimming toward the hoop, then for touching it, then for jumping near it, and finally for jumping through it. This is an example of:
A) Classical conditioning
B) Negative reinforcement
C) Shaping
D) Latent learning
Answer: C) Shaping involves reinforcing successive approximations of a desired behavior. The trainer reinforces each step closer to the target behavior (jumping through the hoop).
