Chapter 11 Flashcards
Developmental psychology
The scientific study of how people change physically, cognitively, socially, and emotionally from infancy through old age
Stages
Distinct segments of an organism’s life with sharp differences or discontinuities between them
Maturation
A series of biological growth processes that enable orderly growth, relatively independent of experience
Cross-sectional design
A methodological approach to studying development that compares participants of different age groups to one another
Longitudinal design
A methodological approach to studying development that tracks participants across time and compares each participant at different time points
Attrition
Participants withdrawing from the study before it is finished
Sequential design
A methodological approach to studying development that tracks multiple age groups across time and compares different age groups to one another, as well as compares participants to themselves at different time points.
Zygote
A fertilized egg, formed by the union of a sperm and an egg
Embryo
An unborn, developing offspring, identified in humans between the 2nd and 8th week of pregnancy
Germinal stage
Where the cells of the zygotes multiply rapidly
Blastocyst
The little ball of cells created two weeks after conception
Embryonic stage
Where the inner cells of the blastocyst form the embryo
Placenta
A mushy, slab-like structure on the wall of the uterus. Represents a collaboration between the pregnant person and the embryo
Endoderm layer
Will form the gut and digestive system
Mesoderm layer
Will form the skeletal system and voluntary muscles
Ectoderm layer
Will become the cells of the nervous system and outer skin
Neural tube
A tubular structure formed early in the embryonic stage from which the brain and spinal cord develop
Neurons and glia
Cells of the developing brain
Neural migration
The process where the neurons and glia become distinct and begin to work together
Fetus
An unborn, developing offspring, identified in humans between the ninth week of pregnancy and birth
Fetal stage
Follows the embryonic stage, begins at the 9th week and continues until birth
Full-term
The brain, lungs, and liver are developed enough for life outside the womb. Begins 37 weeks after conception
Down syndrome
A developmental disorder caused by an extra copy of chromosome 21. It is characterized by intellectual disabilities, delays in motor development, and increased risk for a range of health problems.
Teratogens
Environmental agents that can interfere with healthy fetal development
Fetal alcohol syndrome
A developmental disorder that affects children exposed to alcohol during prenatal development. Its effects include a range of learning and behavioral challenges and differences in physical size and facial characteristics.
Microglia
Special cells that produce immune molecules within the central nervous system and play a crucial role in brain development
Reflexes
Automatic patterns of motor responses that are triggered by specific types of sensory stimulation
Habituation
A simple form of learning that involves a decreased response to a repeated stimulation
Dishabituation
An increase in responsiveness to something novel following a period of habituation
Motor development
Changes in the ability to coordinate and perform bodily movements
Cognitive development
Changes in all of the mental activities associated with thinking, knowing, remembering, and communicating
Schemas
Concepts or mental models that represent our experiences
Assimilation
In Piaget’s theory, the process of using an existing schema to interpret a new experience
Accommodation
In Piaget’s theory, the process of revising existing schemas to incorporate information from a new experience
Sensorimotor stage (birth to 2 years)
Children develop knowledge through their senses and actions but cannot yet think using symbols, namely language. During this stage, children learn that objects continue to exist even when the objects are hidden.
Preoperational stage (2 to 7 years)
Children master the use of symbols but struggle to see situations from multiple perspectives or to imagine how situations can change. During this stage, children classify objects, but only according to a single feature, such as color or shape.
Concrete operational stage (7 to 12 years)
Children become capable of using multiple perspectives and their imagination to solve complex problems, but they are able to apply this thinking only to concrete objects or events.
Formal operational stage (12 years and up)
Adolescents become able to reason about abstract problems and hypothetical propositions
Object permanence
The awareness that objects continue to exist even when they are temporarily out of sight
Neural proliferation
The creation of new synaptic connections
Synaptic pruning
The trimming back of unnecessary synapses according to a “use it or lose it” principle—connections that get used are maintained, and unused connections are eliminated
Myelination of axons
The process of insulating axons in myelin, which speeds their conductivity and allows information to move more rapidly through the brain and body
Social referencing
A process of using others’ facial expressions for information about how to react to a situation
Attachment
The strong, enduring, emotional bond between an infant and a caregiver
Imprinting
A mechanism for establishing attachment early in life that operates according to a relatively simple rule of attaching to the first moving object an organism sees.
Secure attachment
Secure attachment. Children who have a secure attachment relationship with their caregiver use that caregiver as a secure base. They explore, play with the toys, and even make wary overtures to the stranger, so long as the caregiver is present. Whenever the caregiver leaves, these infants show minor distress. When the caregiver returns, the infants show great enthusiasm and are quickly reassured.