Human Growth and Development Study Guide

Overview of Lifespan Development

  • LIFESPAN DEVELOPMENT: Study of patterns of growth, change, and stability in behavior throughout life.

Domains of Development

  • PHYSICAL DEVELOPMENT:

    • Involves the body’s physical makeup, including:

    • Brain

    • Nervous system

    • Muscles

    • Sensory systems

    • Determinants of behavior include needs for food, drink, and sleep.

    • Key Indicators: Height, weight, and brain development.

  • COGNITIVE DEVELOPMENT:

    • Involves growth and change in:

    • Learning

    • Memory

    • Problem-solving

    • Intelligence.

    • Abilities related to intelligence, memory, and thought processes.

  • PSYCHOSOCIAL DEVELOPMENT:

    • PERSONALITY DEVELOPMENT: Changes in enduring characteristics that differentiate individuals.

    • SOCIAL DEVELOPMENT: Changes and stability in individuals' interactions and relationships with others.

Prenatal Development and Infant Growth

  • Prenatal Stages:

    • Germinal Stage: First two weeks post-conception; zygote forms and attaches to the uterine wall. Fertilization of a new cell occurs when the sperm and ovum unite.

    • Embryonic Stage: Weeks 3-8; major organs begin developing.

    • Fetal Stage: Weeks 9 to birth; characterized by rapid growth and further development of body systems.

  • Stages of Labor:

    • First Stage: Longest duration; contractions every 8-10 minutes lasting 30 seconds. Intensity increases leading to "transition"; cervix opens.

    • Second Stage: Ends with the birth of the baby; baby’s head moves through the birth canal.

    • Third Stage: Shortest; umbilical cord and placenta expelled.

  • Developmental Influences:

    • Teratogens: Environmental agents causing birth defects, such as:

    • Substances like drugs and alcohol that can harm fetal development, especially during sensitive periods.

    • Miscarriage: Defined as spontaneous abortion.

    • Genetics vs. Environment: Heredity associated with “nature” and environment with “nurture.”

Motor Skills in Infants

  • Motor Skills:

    • Fine Motor Skills: Small movements (e.g., writing, grasping).

    • Gross Motor Skills: Involves use of large muscles (e.g., crawling, walking).

  • Reflexes in Infants:

    • Rooting Reflex: Infants turn their heads toward a touch on the cheek aiding feeding.

    • Moro Reflex: Startle response to loss of support or loud sounds.

    • Grasping Reflex: Automatic grasping when an object is placed in the infant’s hand.

  • Senses in Newborns:

    • Vision is least developed; hearing and taste are more advanced.

  • Placenta’s Role: Transfers nutrients and oxygen from the mother to the fetus while removing waste.

  • SIDS: Sudden Infant Death Syndrome, leading cause of death in infants.

Early Childhood Development

  • Attachment: Bond between child and primary caregiver (Ainsworth’s “secure base”). Types of attachment include:

    • Secure Attachment: Confident needs will be met.

    • Avoidant Attachment: Insecure, clinging behavior, fear of abandonment.

    • Ambivalent Attachment: Avoids contact but appears independent; results from unmet needs and learned self-sufficiency.

    • Disorganized-Disoriented Attachment: Most insecure; confusion in interpreting emotional signals.

  • Parenting Styles (Baumrind):

    • Authoritative: Clear rules with effective communication.

    • Authoritarian: Strict rules with limited explanation.

    • Permissive: Few rules with high responsiveness.

    • Uninvolved: Indifferent and detached.

Erikson’s Psychosocial Stages

  • Trust vs. Mistrust: Infancy.

  • Autonomy vs. Shame: Toddlerhood.

  • Initiative vs. Guilt: Preschool age.

Gender Development

  • Gender Roles: Cultural expectations for male/female behaviors.

  • Gender Identity: Self-identification as male, female, or nonbinary, typically established by preschool age.

Piaget’s Stages of Cognitive Development

  • Sensorimotor Stage (0-2 years): Knowledge develops through sensory experiences.

  • Preoperational Stage (2-7 years): Language and imagination develop; thinking is egocentric with emergence of symbolic play. Characterized by:

    • Symbolic thinking development but struggles with logic.

Vygotsky’s Zone of Proximal Development (ZPD)

  • The gap between what a child can do independently and what they can achieve with guidance.

    • Learning occurs with assistance just above their current ability level.

  • Language and Counting Skills: Language skills expand, and basic numeracy like counting begins during preschool years.

Theory of Mind

  • The ability to recognize that others have different thoughts, beliefs, and perspectives, developing around ages 4-5.

Types of Play

  • Solitary Play: Playing alone.

  • Parallel Play: Playing alongside others without interaction.

  • Cooperative Play: Playing together, sharing, and coordinating activities.

Middle Childhood Development

  • Physical Growth: Rapid changes in height, weight, and motor skills.

  • Cognitive Skills:

    • Language development and processing of symbolic play.

  • Piaget’s Concrete Operational Thought:

    • Ages 7 to 12: Logical operations applied to concrete problems.

    • Ability to solve conservation problems and attain reversibility.

  • Moral Development (Kohlberg):

    • Preconventional Morality (Stages 1 and 2): Adherence to rules based on rewards and punishments.

    • Conventional Morality (Stages 3 and 4): Approaches based on societal membership; responsible behavior.

    • Postconventional Morality (Stages 5 and 6): Moral principles extend beyond societal norms.

  • Social and Emotional Development:

    • Development of industry (competence) versus inferiority (Erikson’s stages) during elementary years.

Adolescent Development

  • Puberty: Marks the onset of reproductive capability, growth spurts, and development of secondary sex characteristics, influenced by hormones like:

    • Testosterone (males)

    • Estrogen (females)

  • Leading Causes of Death: Accidents among adolescents and young adults.

  • Cognitive Development:

    • Formal Operational Stage (Piaget): Ability to think abstractly and hypothetically, considering future possibilities.

  • Cognitive Changes: Movement from conventional to postconventional moral reasoning according to Kohlberg.

Identity Development

  • Marcia’s Identity Statuses:

    • Identity Diffusion: Lack of commitment or exploration.

    • Foreclosure: Commitment without exploration, often due to parental influence.

    • Moratorium: Active exploration without clear commitment.

    • Identity Achievement: Commitment to identity following exploration.

  • Personal Fable: Sense of uniqueness in experiences.

  • Imaginary Audience: Belief that everyone is focused on oneself.

  • Autonomy and Peer Influence:

    • Questioning family beliefs and values.

    • Peer groups significantly influence behavior and identity.

    • Assertion of individuality may cause conflicts with parents.

  • Psychosocial Development:

    • Identity vs. Role Confusion: Erikson’s focus on self-discovery, exploring various roles and beliefs.

  • Eating Disorders:

    • Anorexia Nervosa: Intense fear of weight gain.

    • Bulimia Nervosa: Binge eating followed by purging.

Adulthood Development

  • Early Adulthood:

    • Intimacy vs. Isolation: Erikson’s emphasis on forming intimate relationships.

    • Physical capabilities peak and then gradually decline.

  • Middle Adulthood:

    • Generativity vs. Stagnation: Contributing to society and assisting the next generation.

    • Onset of:

    • Primary aging (natural biological changes).

    • Secondary aging (affected by lifestyle).

    • Menopause: Permanent cessation of menstruation.

  • Common Changes in Middle and Late Adulthood:

    • Reduced flexibility, slower reaction times, decreased bone density.

Late Adulthood

  • Integrity vs. Despair: Reflecting on life accomplishments.

  • Common Health Concerns:

    • Osteoporosis (fragile bones).

    • Heart disease (leading cause of death).

  • Selective Optimization: Focusing on skills to compensate for aging losses.

Cognitive Development in Adulthood

  • Fluid Intelligence: Problem-solving and adaptability, typically declines with age.

  • Crystallized Intelligence: Accumulated knowledge and verbal skills; often remains stable or improves with age.

  • Memory and Processing Speed: May decline in later adulthood, but wisdom and knowledge tend to remain stable.

Selective Optimization with Compensation

  • Strategy used by older adults to maintain strengths and adapt to changes from aging.

End-of-Life and Aging

  • Aging Terms:

    • Primary Aging: Natural, biological aging process.

    • Secondary Aging: Influenced by environmental and lifestyle factors.

  • Cognitive Decline: Conditions like dementia and other memory-related issues.

  • Psychosocial Aspects:

    • Role of hospice care providing emotional support in end-of-life scenarios.

    • Grief: Emotional response to significant loss.

    • Euthanasia: Assisting terminally ill patients in ending life swiftly.

General Theories and Concepts

  • Nature vs. Nurture: Debate concerning hereditary versus environmental influences on development.

  • Erikson’s Psychosocial Theory:

    • Eight stages of psychosocial development emphasizing core conflicts shaping personality.

    • Stages include trust vs. mistrust, autonomy vs. shame, initiative vs. guilt, industry vs. inferiority, identity vs. role confusion, intimacy vs. isolation, generativity vs. stagnation, integrity vs. despair.

  • Freud’s Theory of Identity Development: Key components of the self which include:

    • Id: Instinct-driven and pleasure-seeking (dominant in infancy).

    • Ego: Balances demands of the id and the superego, taking reality into account.

    • Superego: Encompasses societal values and moral judgments.

    • Stages of Psychosexual Development:

    • Oral Stage (0-2 years): Focus on the mouth; fixation could lead to dependency.

    • Anal Stage (18 months-3 years): Focus on control; fixation can lead to orderliness.

    • Phallic Stage (3-6 years): Focus on relationships with the opposite-sex parent leading to gender identity.

    • Latency Stage (6-puberty): Dormant sexual feelings; emphasis on social development.

    • Genital Stage (puberty onwards): Maturity and focus on relationships.

  • Parenting Styles and Their Outcomes:

    • Authoritative parenting linked to social competence in children.

  • Piaget’s Cognitive Theory Stages:

    • Sensorimotor, preoperational, concrete operational, and formal operational stages.

  • Kohlberg’s Moral Development Stages:

    • Preconventional Morality, Conventional Morality, Postconventional Morality.

Overview of Lifespan Development

  • LIFESPAN DEVELOPMENT: The scientific study of patterns of growth, change, and stability in behavior and capabilities throughout the entire human life cycle. It examines how individuals evolve from conception through old age, focusing on universal principles of development as well as individual differences. This field integrates insights from psychology, biology, sociology, neuroscience, and medicine to understand the multifaceted nature of human change.

Domains of Development

  • PHYSICAL DEVELOPMENT:

    • Involves the body’s physical makeup and changes, including:

    • Brain and nervous system maturation: Growth in brain size, neural connections, and myelination.

    • Muscles and bones: Increases in strength, coordination, and bone density.

    • Sensory systems: Development of sight, hearing, touch, taste, and smell.

    • Hormonal changes: Puberty, menopause, and other endocrine system shifts.

    • Determinants of behavior include basic physiological needs for food, drink, and sleep, which directly impact physical well-being and cognitive function.

    • Key Indicators: Observable changes in height, weight, body proportions, motor skills, and brain development (e.g., changes in gray and white matter).

  • COGNITIVE DEVELOPMENT:

    • Involves growth and change in mental abilities, including:

    • Learning: The acquisition of new information and skills.

    • Memory: The encoding, storage, and retrieval of information, including short-term, long-term, and working memory.

    • Problem-solving: The ability to analyze situations, devise strategies, and find solutions.

    • Intelligence: Intellectual capabilities, reasoning, and abstract thought.

    • Language development: The acquisition of communication skills, from babbling to complex sentence structures.

    • Creativity: The generation of novel ideas and solutions.

    • Abilities related to intelligence, memory, and thought processes are studied through tasks involving attention, perception, and decision-making across the lifespan.

  • PSYCHOSOCIAL DEVELOPMENT:

    • Focuses on changes in emotional, personality, and social aspects of development.

    • PERSONALITY DEVELOPMENT: Refers to changes in the enduring characteristics and traits that differentiate individuals, influencing how they interact with the world and cope with challenges. This includes temperamental changes, self-concept, and identity formation.

    • SOCIAL DEVELOPMENT: Encompasses changes and stability in individuals' interactions and relationships with others, including family, peers, and larger social groups. It also covers the development of social skills, empathy, and moral reasoning.

Prenatal Development and Infant Growth

  • Prenatal Stages:

    • Germinal Stage: Extends from conception (Day 0) to approximately the first two weeks post-conception. It begins with fertilization, where a sperm and ovum unite to form a new cell called a zygote. This single cell undergoes rapid cell division (mitosis) creating a blastocyst, which then travels down the fallopian tube and successfully implants into the uterine wall around Day 11-15. This implantation marks the transition to the next stage.

    • Embryonic Stage: Occurs from weeks 3 through 8 post-conception. This is a critical period of intense cell differentiation and organogenesis, where major organs and body systems (e.g., circulatory, nervous, digestive) rapidly begin developing from three distinct cell layers (ectoderm, mesoderm, endoderm). The embryo also develops basic bodily structures like the head, trunk, and limb buds during this time.

    • Fetal Stage: Lasts from week 9 to birth (approximately week 38-40). This stage is characterized by rapid growth in size and weight, extensive maturation of all organ systems, and further refinement of bodily structures. The fetus develops reflexes, can move, and increasingly prepares for life outside the womb. This stage includes significant brain development and the accumulation of fat reserves.

  • Stages of Labor:

    • First Stage (Dilation and Effacement): Typically the longest duration, often 12-24 hours for first births. Contractions occur every 8-10 minutes, lasting 30 seconds initially, gradually becoming more frequent, longer, and stronger. The mother's cervix thins (effacement) and widens (dilation) to about 10 cm. This stage culminates in