VCE Psychology Exam Revision Notes

AoS1: Psychological Development

DP1: Interactive Influences of Hereditary and Environmental Factors

  • Psychological development is shaped by both nature (heredity) and nurture (environment).
  • Heredity:
    • Genetic traits passed down from parents.
    • Examples: Intelligence, personality tendencies, and risk factors for mental illnesses.
  • Environment:
    • Life experiences, culture, upbringing, peer influences, and education.
  • Interactionist Approach:
    • Heredity and environment work together, not separately.
  • Case Study: Alex
    • Alex inherited musical ability from his father (heredity).
    • Years of practice and encouragement from his teacher contributed to his skill (environment).

DP2: Biopsychosocial Approach

  • A model that explains development through three interacting factors:
    • Biological Factors:
      • Genetics, brain chemistry, hormones, and physical health.
    • Psychological Factors:
      • Thoughts, emotions, learning, coping strategies, and personality.
    • Social Factors:
      • Family, peers, culture, education, and socioeconomic status.
  • Protective and Risk Factors
    • Protective Factors:
      • Promote resilience and mental wellbeing.
      • Examples: Strong social support, good coping skills, positive self-esteem, and regular exercise.
    • Risk Factors:
      • Increase the likelihood of poor mental health.
      • Examples: Trauma, chronic stress, substance abuse, and social isolation.
  • Key Characteristics of Mental Health
    • Mentally Healthy:
      • High levels of emotional, psychological, and social functioning.
      • Good resilience and ability to cope with stress.
    • Mental Health Problems:
      • Temporary difficulties affecting thoughts, emotions, or behavior.
      • Examples: Short-term anxiety or stress.
    • Mental Disorders:
      • Diagnosable conditions with significant impairment.
      • Examples: Depression and schizophrenia, requiring professional treatment.
  • Case Study: Emily
    • Emily, a 17-year-old, feels anxious about school.
      • Biological factor: Family history of anxiety.
      • Psychological factor: Worries about failing exams.
      • Social factor: Stopped spending time with friends due to workload.

DP3: Process of Psychological Development

  • Psychological development occurs in three major areas:
    1. Emotional Development (Ainsworth’s Attachment Theory)
      • Ainsworth’s three attachment styles (Strange Situation experiment):
        • Secure Attachment:
          • Infant feels safe and explores.
          • Distressed when caregiver leaves but comforted upon return.
          • Linked to healthy relationships later in life.
        • Insecure-Avoidant Attachment:
          • Infant shows little distress when caregiver leaves and avoids them upon return.
          • May struggle with emotional closeness later.
        • Insecure-Resistant Attachment:
          • Infant is highly distressed when caregiver leaves and remains upset when they return.
          • Often anxious and clingy in later relationships.
    2. Cognitive Development (Piaget’s Stages)
      • Changes in thinking, memory, problem-solving, and perception over time.
      • Piaget’s stages: sensorimotor, preoperational, concrete operational, formal operational.
    3. Social Development (Erikson’s Psychosocial Stages)
      • Development of relationships, identity, and moral understanding.
      • Erikson’s eight stages, each involving a key conflict (e.g., identity vs. role confusion in adolescence).
      • Successful resolution of conflicts leads to healthy personality development.
  • Case Study: Jake
    • Jake, a 3-year-old, is upset when his mother leaves and clings to her but pushes her away angrily upon her return.
    • Likely attachment style: Insecure-resistant.
    • This attachment style may affect his social and emotional development by causing him to struggle to form close friendships and worry about people leaving him.

DP4: Role of Sensitive and Critical Periods

  • Critical Periods:
    • Specific time frames where certain experiences are essential for development.
    • Example: Language acquisition in early childhood.
  • Sensitive Periods:
    • Optimal times for learning, but development can still occur later with more difficulty.
    • Example: Learning a second language.
  • These concepts emphasize the importance of early life experiences.
  • Case Study: Mia
    • Mia, 5 years old, quickly learns Spanish after moving to a Spanish-speaking school.
    • Her grandfather struggles to learn basic Spanish.
    • Mia's case illustrates the concept of a sensitive period, whereas the grandfather's case shows a critical period.

AoS2: Brain Structure & Function

DP1: Different Approaches Over Time

  1. Brain vs. Heart Debate
    • Debate over whether the brain or heart controlled thinking, emotions, and behavior.
    • Ancient Egyptians and Aristotle thought the heart was in charge.
    • Hippocrates and Plato believed it was the brain.
    • Significance: Started the conversation about the location of the mind.
  2. Mind-Body Problem
    • Debate about whether the mind and body are separate or the same thing.
    • Descartes’ view: Mind and body are separate (dualism) but interact.
    • Modern view: Mind is created by brain activity (monism).
  3. Phrenology
    • Theory that bumps on your skull show your personality and abilities.
    • Developed by Franz Gall in the 1800s.
    • Significance: Wrong but helped start the idea that different brain parts do different jobs.
  4. Brain Experiments
    • Observing what happens when certain brain areas are damaged or stimulated.
    • Examples:
      • Broca’s area (speech production).
      • Wernicke’s area (language understanding).
      • Split-brain studies showed different roles for the left and right sides of the brain.
    • Significance: Showed that specific brain areas control certain functions.
  5. Neuroimaging
    • Technology to look inside the brain, showing structure or function.
    • Structural Neuroimaging
      • Shows the physical structure of the brain.
      • Helpful for spotting injuries, tumours, or abnormalities.
      • CT Scan (Computed Tomography):
        • Uses X-rays to take multiple images and build a detailed picture.
        • Good for detecting bleeding, injury, or tumours.
      • MRI (Magnetic Resonance Imaging):
        • Uses strong magnetic fields and radio waves.
        • No radiation; clearer than a CT scan.
    • Functional Neuroimaging
      • Shows brain activity during tasks or at rest.
      • fMRI (Functional MRI):
        • Tracks blood flow to show active brain areas.
        • Great for studying mental processes in real-time.
      • PET Scan (Positron Emission Tomography):
        • Uses a small amount of radioactive glucose.
        • Helpful for understanding brain function in mental disorders or dementia.
  • Case Study: Ben
    • Ben, a 21-year-old, has trouble speaking after a car accident.
    • A brain scan found damage in the left frontal lobe (structural neuroimaging).
    • Another scan measured brain activity during language tasks (functional neuroimaging), showing decreased activity in the damaged area and increased activity in the right hemisphere.

DP2: Roles of Hindbrain, Midbrain, and Forebrain

  1. Hindbrain
    • Located at the base of the brain, near the spinal cord.
    • Controls vital, automatic functions.
    • Key Parts:
      • Medulla: Controls heart rate, breathing, and reflexes like swallowing.
      • Pons: Helps with sleep, breathing, and coordination.
      • Cerebellum: Involved in balance, posture, and fine motor coordination.
    • Role in Behavior and Mental Processes:
      • Keeps the body alive (e.g., breathing).
      • Enables smooth, coordinated movement.
      • Supports some learning of motor skills (e.g., riding a bike).
  2. Midbrain
    • Above the hindbrain, connects the brainstem to the forebrain.
    • Helps process sensory information and controls alertness.
    • Key Part:
      • Reticular Formation: Regulates alertness, attention, and sleep-wake cycles.
    • Role in Behavior and Mental Processes:
      • Filters incoming sensory information.
      • Helps focus attention and stay conscious.
      • Supports basic responses to sights and sounds.
  3. Forebrain
    • Largest and most complex area.
    • Controls higher-order thinking, emotions, memory, and voluntary behavior.
    • Key Parts:
      • Thalamus: Relays sensory information to the cerebral cortex.
      • Hypothalamus: Regulates hunger, thirst, sleep, and emotions (via hormones).
      • Limbic System (including the amygdala and hippocampus): Involved in emotion and memory.
    • Role in Behavior and Mental Processes:
      • Controls emotions, memory, decision-making, and motivation.
      • Processes sensory information for conscious thought.
      • Coordinates internal states like hunger and temperature.
  4. Cerebral Cortex (Part of the Forebrain)
    • Outer layer of the forebrain.
    • Responsible for complex thinking, voluntary movement, and sensory perception.
    • Divided into Four Lobes:
      • Frontal Lobe: Planning, decision-making, problem-solving, voluntary movement.
      • Parietal Lobe: Processes touch, temperature, and spatial awareness.
      • Occipital Lobe: Processes vision.
      • Temporal Lobe: Processes sound and is involved in memory.
    • Role in Behavior and Mental Processes:
      • Enables conscious thought, language, imagination, and learning.
      • Allows us to interpret the world and respond with complex behavior.
  • Case Study Scenario: Ella
    • Ella, a 19-year-old, injured in a skiing accident.
    • Symptoms: Difficulty with balance and coordination, trouble staying awake, and struggling to focus.
    • Damage: Likely damage to the hindbrain (cerebellum for balance and coordination, pons/medulla for alertness).

DP3: Neuroplasticity

  • Neuroplasticity: The brain's ability to reorganize and form new neural connections in response to learning, experience, or injury.
  • Developmental Neuroplasticity:
    • Occurs during childhood and adolescence as the brain develops.
    • Long-Term Potentiation (LTP): Strengthening of synaptic connections with repeated stimulation, crucial for learning and memory.
    • Long-Term Depression (LTD): Weakening of synaptic connections, allowing the brain to "unlearn" or down-regulate information.
    • Synaptogenesis: The formation of new synapses, essential for learning and memory.
    • Synaptic Pruning: The elimination of unused or redundant synapses, making the brain more efficient.
  • Adaptive Neuroplasticity:
    • Happens throughout life, particularly in response to injury or experience.
    • Sprouting: Growth of new axon or dendrite branches to form new connections, helping repair networks after injury.
    • Rerouting: The brain forms new pathways to compensate for damaged ones, aiding recovery and adaptation.
  • Maximisation of Brain Functioning
    • Diet – Enhancing synaptic transmission and cognitive function
    • Physical Activity - Reduced age-related decline in the cortical tissue of lobes
    • Mental Stimulation – Increased formation and survival of new neurons and synapses
  • Case Study: Emily
    • Emily, a 15-year-old, struggles with concentration and memory.
    • Experiences: Fatigue, trouble focusing, and difficulty retaining information.
    • Factors: Inconsistent sleep patterns, poor diet, lack of physical activity, and excessive phone use.
    • Long-term depression neurologically: Due to LTD from lack of stimulation and poor health habits.

DP4: Impact of Acquired Brain Injury (ABI)

  • ABI – Acquired Brain Injury refers to any brain damage that occurs after birth.
  • It can affect physical, emotional, cognitive, and behavioral functioning, and the effects can be temporary or permanent.
  • Types of ABI
    1. Traumatic Brain Injury (TBI):
      • Caused by an external force to the head.
      • Examples: Car accidents, falls, sports injuries, assaults.
    2. Non-Traumatic Brain Injury:
      • Caused by internal factors.
      • Examples: Stroke, lack of oxygen, infection, substance abuse, tumours, or neurological illnesses like epilepsy.
  • Case Study: Tom
    • Tom, a 17-year-old, experienced an ABI after an accident.
      • Biological effect: Physical impairment.
      • Psychological effect: Emotional changes.
      • Social effects: Difficulty in social situations.

DP5 & DP6: Neurological Disorders & Chronic Traumatic Encephalopathy (CTE)

  • Chronic Traumatic Encephalopathy (CTE) is a progressive brain disease linked to repeated head injuries.
  • Common in athletes (e.g., footballers, boxers) and military veterans.
  • Brain moves around against skull causing bruising, swelling and small bleeds
  • Key Features:
    • Degenerative: CTE worsens over time and currently has no cure.
    • Linked to Trauma: Caused by repeated head impacts, not just one severe injury.
    • Tau Protein Buildup: Abnormal accumulation of tau proteins disrupts normal function.
  • Case Study: Marcus
    • Marcus, a 38-year-old former rugby player, experienced numerous concussions.
    • Symptoms: Forgetfulness, difficulty concentrating, mood swings, and depression.
    • Psychological symptoms: Forgetfulness and mood swings.
    • Biological basis: Tau protein buildup due to repeated head trauma.

AoS3: Ethical Concepts & Guidelines, Experiment Designs, Sampling & Variables

Ethical Concepts & Guidelines

  • When conducting psychological research, ethical concepts (morals) must be considered and supported by ethical guidelines (practicals).
  • Ethical Concepts
    1. Justice
    2. Respect
    3. Integrity
    4. Non-Maleficence
    5. Beneficence
  • Ethical Guidelines
    1. Voluntary Participation
    2. Withdrawal rights
    3. Informed Consent
    4. Confidentiality
    5. Deception in Research
    6. Debriefing

Population, Sample, & Variables

  • Population: People of interest (be specific).
  • Sample: Number and characteristics of the participants who reflect the people of interest.
    • The chosen sample needs to be large enough compared to the population to represent variables such as age, sex, geographical location and socio-economic status
    • large samples are important to help ensure the sample is as representative of the population as possible, and to minimise any participant variable that could influence the results
  • Experimental Group: Exposed to the IV to observe its effect.
  • Control Group: Not exposed to the IV; used as a comparison.
  • IV (Independent Variable): Manipulated condition/variable.
  • DV (Dependent Variable): The measure of the effect caused by the condition/variable.
  • Extraneous Variable: Any variable other than the IV that might affect the DV.
  • Confounding Variable: An uncontrolled variable that has a direct effect on the DV, making results unreliable.
  • Controlled Variable: Any unwanted variables that could have an effect on the DV that have been minimised/removed.

Investigation Design

  1. Between-Subjects Design:
    • Participants are randomly allocated to control and experimental groups.
  2. Within-Subjects Design:
    • Participants are exposed to both control and experimental conditions.
  3. Mixed Design:
    • Combines elements of a between-subjects design and a within-subjects design.

Types of Sampling

  • Stratified Sample:
    • Carefully pooled participants to evenly reflect the population; this is done by dividing the population into subgroups and then randomly selecting participants from each subgroup in the proportion they appear in the population.
  • Random Sample:
    • A group of randomly chosen participants.
  • Convenience Sample:
    • Whoever is willing, accessible, and efficient.