DPG prenatal/infancy

Prenatal Stage: The period of development from conception to birth, encompassing three main stages: the zygote, embryo, and fetus.
Example: During the prenatal stage, a baby develops from a single fertilized cell into a fully formed infant ready for birth.

Zygote: The fertilized egg cell formed when sperm and egg combine, marking the beginning of pregnancy.
Example: A zygote undergoes rapid cell division in the first few days after fertilization.

Genes: Segments of DNA that carry hereditary information and determine traits in organisms.
Example: A child may inherit the gene for eye color from their parents, determining whether they have blue or brown eyes.

Embryo: The early stage of prenatal development, typically from two weeks to eight weeks after fertilization, where major organs and structures begin to form.
Example: By the sixth week, an embryo develops a heart that begins to beat.

Fetus: The stage of prenatal development from about nine weeks until birth, when the body continues to grow and organs mature.
Example: By 24 weeks, a fetus can respond to sound and light.

Placenta: An organ that develops during pregnancy to provide nutrients and oxygen to the fetus and remove waste products.
Example: The placenta acts as a filter, protecting the fetus from harmful substances in the mother’s bloodstream.

Teratogens: Harmful substances or agents that can cause birth defects or developmental problems during pregnancy.
Example: Alcohol and certain drugs are teratogens that can cause developmental issues if consumed during pregnancy.

Fetal Alcohol Syndrome (FAS): A condition resulting from prenatal alcohol exposure, leading to physical and mental developmental issues.
Example: A child born with FAS may have growth deficiencies, facial abnormalities, and learning disabilities.

Reflexes: Automatic, involuntary movements or responses triggered by specific stimuli, important for infant survival.
Example:

• Rooting Reflex: When a newborn’s cheek is stroked, they turn their head and open their mouth, searching for a nipple to feed.

Temperament: An individual’s characteristic mood, emotional reactivity, and behavioral tendencies that are generally consistent over time.
Example: A child with a highly reactive temperament might become upset easily when introduced to new experiences or people, whereas a child with a more easygoing temperament might adapt more quickly to changes.

Physical Development (Define Ages and Stages):

• Infant (0-2 years): The stage marked by rapid physical growth, including milestones like crawling, walking, and the development of basic motor skills.
  Example: An infant begins to roll over at 4-6 months and starts walking around 12 months.

• Toddler (2-4 years): This stage involves increased mobility, the development of fine motor skills (like drawing), and early language skills.
  Example: By age 3, toddlers can run, jump, and start using simple sentences to communicate.

• Child (4-12 years): Steady physical growth and the refinement of motor skills, like balance, coordination, and more complex movements.
  Example: By age 6-7, children are typically able to ride a bike and engage in organized games like soccer or basketball.

Maturation: The biological process through which an individual’s body and brain naturally grow and develop over time, which influences when certain abilities or milestones are reached.
Example: Maturation is responsible for the timing of physical milestones like when a baby begins to walk, usually around 12 months.

Motor Development: Refers to the progression of physical abilities and skills in infants and children, involving both gross and fine motor skills.
Example: A baby learning to crawl and then walk.

Stages of Motor Development (according to Figure 12.3): These are the typical sequences of physical milestones children achieve, including reflexive movements, rudimentary movements, fundamental movements, specialized movements, and application of movements.
Example: A child moves from crawling (rudimentary) to running (specialized).

Developmental Psychology: The study of how humans grow and change over the lifespan, including cognitive, emotional, and social development.
Example: Examining how teenagers develop a sense of identity during adolescence.

Jean Piaget: A Swiss psychologist known for his theory of cognitive development, which includes stages like sensorimotor, preoperational, concrete operational, and formal operational stages.
Example: A 7-year-old developing the ability to perform logical operations on concrete objects in the concrete operational stage.

Cognition: Refers to the mental processes involved in gaining knowledge and understanding, such as thinking, memory, problem-solving, and decision-making.
Example: Solving a math problem requires logical reasoning and memory.

Schemas: Mental frameworks or structures that help us organize and interpret information.
Example: A child’s schema for “dog” might include furry animals with four legs that bark.

Assimilation: The process of incorporating new information into existing schemas without changing the schema.
Example: A child sees a zebra for the first time and calls it a "horse" because it fits their schema for animals with four legs.

Accommodation: The process of modifying existing schemas or creating new ones to incorporate new information.
Example: After learning about zebras, the child updates their schema to differentiate between horses and zebras.

Sensorimotor Stage: The first stage in Piaget's theory of cognitive development (from birth to around 2 years), where infants learn through sensory experiences and motor actions, gradually developing object permanence.
Example: A baby exploring a toy by touching and shaking it.

Object Permanence Studies: Research examining the understanding that objects continue to exist even when they are not visible.
Example: Piaget’s study where infants were shown a toy and then it was hidden, and infants younger than 8 months did not search for the object, showing a lack of object permanence.

Stranger Anxiety: A fear or distress exhibited by infants when encountering unfamiliar people, typically emerging around 6-8 months.
Example: A baby cries when held by someone other than their parent.

Attachment: The emotional bond between a child and their caregiver, influencing social and emotional development.
Example: A child seeks comfort from their mother when scared or upset.

Harry Harlow: A psychologist famous for his studies on attachment in rhesus monkeys, demonstrating the importance of comfort and nurturing over just basic nourishment.
Example: Harlow’s experiment where infant monkeys preferred to stay with a soft, cloth surrogate mother rather than a wire mother that provided food.

Familiarity: The process of recognizing and being comfortable with people, places, or objects that a child has experienced before, which plays a role in attachment formation.
Example: A toddler feels secure when a parent enters a room they are familiar with.

Critical Period: A specific window of time during which certain experiences or stimuli must occur for normal development to happen.
Example: A young bird must hear its species’ song within a few weeks of birth to develop proper song patterns.

Konrad Lorenz: A psychologist and ethologist known for his research on imprinting, particularly with ducks and geese, showing the influence of early experiences on behavior.
Example: Lorenz found that ducklings would imprint on the first moving object they saw, usually him, if they were exposed to him shortly after hatching.

Imprinting: A form of learning occurring at a critical period early in life, in which a young animal forms an attachment to the first moving object it encounters, often its mother.
Example: A baby duckling following the first moving object it sees, typically its mother or another object, in the hours after hatching.

Responsiveness: The degree to which a caregiver meets and reacts to a child's emotional and physical needs, crucial for developing secure attachment.
Example: A mother promptly soothing her baby when it cries, showing responsiveness to the baby's distress.

Mary Ainsworth: A developmental psychologist known for her work on attachment theory, particularly through the Strange Situation experiment, which categorized types of attachment in infants.
Example: Ainsworth’s study demonstrated how infants react to separations and reunions with their caregivers, leading to classifications of attachment styles.

Securely Attached: A type of attachment where infants feel confident that their caregiver will respond appropriately to their needs, leading to exploration and comfort when the caregiver is present.
Example: A child playing in a room and exploring, but returning to their mother for reassurance when a stranger enters.

Insecurely Attached: A type of attachment where infants exhibit anxiety or avoidance toward their caregiver, often due to inconsistent or unresponsive caregiving.
Example: A child either avoids or becomes overly clingy with their caregiver, showing distress when separated but not seeking comfort upon reunion.