Chapter 1: The Science of Psychology

Major Perspectives in Psychology

• Psychodynamic Perspective: Focuses on unconscious drives and conflicts, originating from Freud's theories.

• Behavioral Perspective: Emphasizes observable behaviors and the effects of learning; associated with Pavlov, Watson, and Skinner.

• Humanistic Perspective: Centers on free will, self-actualization, and human potential; key figures include Maslow and Rogers.

• Cognitive Perspective: Studies mental processes such as thinking, memory, and problem-solving.

• Socio-Cultural Perspective: Examines how social and cultural factors influence behavior and mental processes.

• Biopsychological Perspective: Investigates the biological bases of behavior, including genetics, brain structures, and neurochemistry.

• Evolutionary Perspective: Explores how evolutionary processes like natural selection influence behavior.

Psychologists vs. Psychiatrists

• Psychologists: Professionals with doctoral degrees (Ph.D. or Psy.D.) in psychology; focus on therapy, research, and teaching.

• Psychiatrists: Medical doctors (M.D.) who can prescribe medication and treat psychological disorders medically.

The Scientific Method (5 Steps)

1. Perceiving the Question: Identifying a phenomenon and formulating a theory.

2. Forming a Hypothesis: Creating a testable prediction; includes operational definitions (precise definitions of variables).

3. Testing the Hypothesis: Conducting experiments or observations to gather data.

4. Drawing Conclusions: Analyzing data to determine if the hypothesis is supported.

5. Reporting Results: Sharing findings with the scientific community for replication and review.

Descriptive Methods

• Naturalistic Observation: Observing subjects in their natural environment without interference.

• Laboratory Observation: Observing behavior in a controlled environment.

• Case Studies: In-depth analysis of a single individual or small group.

• Surveys: Collecting self-reported data from large groups using questionnaires or interviews.

Sample vs. Population

• Population: The entire group of interest in a study.

• Sample: A subset of the population selected for study.

• Representative Sample: A sample that accurately reflects the characteristics of the population.

Correlational Studies

• Positive Correlation: Both variables increase or decrease together.

• Negative Correlation: One variable increases as the other decreases.

• Correlation Coefficient: ranges from to ; closer to indicates stronger correlation.

The Experimental Method

• Independent Variable (IV): The variable manipulated by the researcher.

• Dependent Variable (DV): The variable measured for change.

• Experimental Group: Receives the treatment or manipulation.

• Control Group: Does not receive the treatment; used for comparison.

• Placebo Effect: Changes in behavior due to participants' expectations, not the treatment itself.

Chapter 2: Biological Perspective

Characteristics of the Neuron

• Cell Body (Soma): Contains the nucleus and maintains cell health.

• Dendrites: Receive signals from other neurons.

• Axon: Transmits electrical impulses away from the cell body.

• Axon Terminals: Release neurotransmitters to communicate with other neurons.

• Myelin Sheath: Fatty layer that insulates axons and speeds up neural transmission.

• Action Potential/Neural Impulse: Electrical signal traveling down the axon.

• Synapse (Synaptic Gap): The space between neurons where neurotransmitters are released.

Neurotransmitters (NT)

• Serotonin: Involved in mood regulation, sleep, and appetite.

• Dopamine: Associated with movement, reward, and pleasure.

The Nervous System

• Central Nervous System (CNS): Consists of the brain and spinal cord.

• Spinal Cord: Transmits information between the brain and the body; involved in reflexes.

• Peripheral Nervous System (PNS): Connects the CNS to the rest of the body.

• Somatic Nervous System: Controls voluntary movements of skeletal muscles.

• Autonomic Nervous System: Regulates involuntary functions (e.g., heart rate, digestion).

  • Sympathetic Nervous System: Activates 'fight or flight' response.

  • Parasympathetic Nervous System: Promotes 'rest and digest' functions.

Neuroplasticity

• The brain's ability to reorganize and adapt by forming new neural connections throughout life.

The Brain

• Cerebral Cortex (Cerebral Hemispheres): The outer layer of the brain, responsible for higher-order functions.

• Four Lobes:

  • Frontal Lobe: Planning, reasoning, movement, and speech.

  • Parietal Lobe: Sensory processing (touch, temperature, pain).

  • Temporal Lobe: Auditory processing and memory.

  • Occipital Lobe: Visual processing.

• Hypothalamus: Regulates hunger, thirst, body temperature, and hormones.

• Amygdala: Involved in emotion, especially fear and aggression.

• Hippocampus: Essential for forming new memories.

Chapter 5: Learning

Classical Conditioning

• Learning through association; discovered by Ivan Pavlov in his dog experiments.

• Unconditioned Stimulus (UCS): Naturally elicits a response (e.g., food).

• Unconditioned Response (UCR): Natural reaction to UCS (e.g., salivation).

• Conditioned Stimulus (CS): Previously neutral, becomes associated with UCS.

• Conditioned Response (CR): Learned response to CS.

• Stimulus Generalization: Responding similarly to stimuli resembling the CS.

• Stimulus Discrimination: Learning to respond only to the specific CS.

• Extinction: Gradual weakening of the CR when the CS is presented without the UCS.

• Spontaneous Recovery: Reappearance of a weakened CR after a pause.

Conditioned Emotional Response

• John B. Watson's "Little Albert" experiment demonstrated that emotions can be classically conditioned.

Operant Conditioning

• B.F. Skinner's theory: Behavior is shaped by consequences.

• Reinforcement: Increases the likelihood of a behavior.

  • Positive Reinforcement: Adding a desirable stimulus.

  • Negative Reinforcement: Removing an aversive stimulus.

• Punishment: Decreases the likelihood of a behavior.

  • Positive Punishment (By Application): Adding an unpleasant stimulus.

  • Negative Punishment (By Removal): Taking away a desirable stimulus.

• Shaping: Gradually reinforcing closer approximations to the desired behavior.

Cognitive Learning

• Learned Helplessness: When exposure to uncontrollable events leads to passive behavior.

Observational Learning

• Albert Bandura's "Bobo doll" study showed that children imitate aggressive behavior observed in adults.

• Elements of Observational Learning: Attention, retention, reproduction, and motivation.

Chapter 8: Development Across the Lifespan

Nature vs. Nurture

• Debate over the relative contributions of genetics (nature) and environment (nurture) to development.

Prenatal Development

• Germinal Period: First two weeks after conception; zygote formation.

• Embryonic Period: Weeks 2-8; major organs develop; vulnerable to teratogens (harmful substances).

• Fetal Period: Week 9 to birth; growth and maturation of organs.

Cognitive Development (Jean Piaget)

• Schemas: Mental frameworks for organizing information.

• Stages of Cognitive Development:

  • Sensorimotor Stage (0-2 yrs): Learning through senses and actions; object permanence develops.

  • Preoperational Stage (2-7 yrs): Symbolic thinking; egocentrism; lack of conservation.

  • Concrete Operational Stage (7-11 yrs): Logical thinking about concrete events; mastery of conservation.

  • Formal Operational Stage (12+ yrs): Abstract and hypothetical reasoning.

Lev Vygotsky's Sociocultural Theory

• Scaffolding: Support provided by adults or peers to help a child learn.

• Zone of Proximal Development (ZPD): The range between what a child can do alone and what they can do with help.

Psycho-Social Development

• Temperament: Innate aspects of personality, such as emotional reactivity.

• Attachment: Emotional bond between child and caregiver.

  • Mary Ainsworth's Attachment Styles:

    • Secure: Child is distressed by separation but comforted by return.

    • Avoidant: Child avoids caregiver after separation.

    • Ambivalent: Child is anxious and not easily comforted.

• Diana Baumrind's Parenting Styles: Authoritative, authoritarian, permissive, and uninvolved (Additional info: Baumrind identified three main styles; uninvolved was added later by other researchers).

• Erikson's Theory: Stages of psychosocial development, e.g., Trust vs. Mistrust (infancy), Identity vs. Role Confusion (adolescence).

Chapter 12: Social Psychology

Social Influence

• Conformity: Adjusting behavior to match group norms; demonstrated in Asch's classic line judgment study.

• Compliance: Changing behavior in response to a direct request.

• Obedience: Following orders from an authority figure; studied in Milgram's shock experiments.

Social Cognition

• Attitudes: Evaluations of people, objects, or ideas.

• The ABC Model: Attitudes have three components: Affective (emotions), Behavioral (actions), Cognitive (beliefs).

• Social Categorization: Classifying people into groups; can lead to stereotypes.

• Stereotype: Oversimplified belief about a group.

• Prejudice: Negative attitude toward a group.

• Discrimination: Negative behavior toward a group.

• Attribution: Explaining the causes of behavior.

  • Fundamental Attribution Error: Overestimating personal factors and underestimating situational factors in others' behavior.

• Prosocial Behaviors: Actions intended to benefit others.

  • Bystander Effect: People are less likely to help when others are present.

  • Diffusion of Responsibility: The presence of others reduces individual responsibility to act.

Chapter 13: Personality

Personality Perspectives

• Psychodynamic Perspective: Focuses on unconscious motives and conflicts (Freud).

• Humanistic Perspective: Emphasizes personal growth and self-actualization (Maslow, Rogers).

• Trait Perspective: Describes personality in terms of stable traits.

The Psychodynamic Perspective (Freud)

• Structure of the Mind: Conscious (aware), preconscious (just below awareness), unconscious (hidden memories and desires).

• Personality Structures:

  • Id: Primitive, pleasure-seeking part (unconscious).

  • Ego: Rational, reality-oriented mediator.

  • Superego: Moral conscience.

• Psychological Defense Mechanisms: Unconscious strategies to reduce anxiety.

  • Repression: Pushing distressing thoughts into the unconscious.

  • Denial: Refusing to accept reality.

  • Displacement: Redirecting emotions to a safer outlet.

Humanism & Personality

• Abraham Maslow: Proposed the Hierarchy of Needs, culminating in self-actualization.

• Carl Rogers: Emphasized self-concept (real vs. ideal self) and the importance of positive regard.

Trait Theory

• The Big Five (O.C.E.A.N.): Openness, Conscientiousness, Extraversion, Agreeableness, Neuroticism.

Chapter 14: Psychological Disorders

What is Abnormal?

• Abnormal behavior is typically defined by statistical rarity, deviance from social norms, personal distress, and maladaptiveness.

Diagnosing and Classifying Disorders: DSM-5

• The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) is used to classify and diagnose psychological disorders based on specific criteria.

Anxiety Disorders

• Phobias: Irrational fears of specific objects or situations (e.g., agoraphobia).

• Panic Disorder: Recurrent panic attacks—sudden episodes of intense fear.

• Generalized Anxiety Disorder: Persistent, excessive worry about various aspects of life.

• Obsessive-Compulsive Disorder (OCD): Intrusive thoughts (obsessions) and repetitive behaviors (compulsions).

• Acute Stress Disorder & Posttraumatic Stress Disorder (PTSD): Anxiety following exposure to traumatic events.

Disorders of Mood

• Major Depressive Disorder: Persistent sadness, loss of interest, and other symptoms.

• Bipolar Disorder: Alternating periods of depression and mania.

Dissociative Disorders

• Dissociation: Disruption in consciousness, memory, or identity.

• Dissociative Identity Disorder: Presence of two or more distinct identities (formerly multiple personality disorder).

• Fugue: Sudden travel away from home with memory loss for identity.

Schizophrenia

• Characterized by disorganized thinking, hallucinations, and delusions.

• Positive Symptoms: Excesses such as hallucinations and delusions.

• Negative Symptoms: Deficits such as flat affect and lack of motivation.

Personality Disorders

• Antisocial Personality Disorder: Disregard for others' rights, lack of empathy, and often criminal behavior.

Example: In the "Little Albert" experiment, a child was conditioned to fear a white rat by pairing it with a loud noise, demonstrating classical conditioning of emotions.

Additional info: Where the original notes listed only names or terms, brief academic explanations and examples have been added for clarity and completeness.