maturation
biological growth processes that enable orderly changes in behavior, relatively uninfluenced by experience
critical period
an optimal period early in the life of an organism when exposure to certain stimuli or experiences produces normal development
cognition
all the mental activities associated with thinking, knowing, remembering, and communication
schema
a concept or framework that organizes and interprets information
assimilation
interpreting our new experiences in terms of our existing schemas
accommodation
adapting our current understands to incorporate new information
sensorimotor stage
in Piaget's theory, the stage (from birth to about 2 years of age) during which infants know the world mostly in terms of their sensory impressions and motor activities
object permanence
the awareness that things continue to exist even when not perceived
preoperational stage
in Piaget's theory, the stage (from about 2 to 6 or 7 years of age) during which a child learns to use language but does not yet comprehend the mental operations of concrete logic
conservation
the principle (which Piaget believed to be a part of concrete operational reasoning) that properties such as mass, volume, and number remain the same despite changes in the forms of objects
egocentrism
in Piaget's theory, the preoperational child's difficulty taking another's point of view
theory of mind
people's ideas about their own and others' mental states—about their feelings, perceptions, and thoughts, and the behaviors these might predict.
concrete operational stage
in Piaget's theory, the stage of cognitive development (from about 7 to 11 years of age) during which children gain the mental operations that enable them to think logically about concrete events
formal operational stage
in Piaget's theory, the stage of cognitive development (normally beginning about age 12) during which people begin to think logically about abstract concepts
scaffold
a framework that offers children temporary support as they develop higher levels of thinking
autism spectrum disorder
a disorder that appears in childhood and is marked by significant deficiencies in communication and social interaction, and by rigidly fixated interests and repetitive behaviors
stranger anxiety
the fear of strangers that infants commonly display, beginning by about 8 months of age
attachment
an emotional tie with another person; shown in young children by their seeking closeness to the caregiver and showing distress on separation
imprinting
the process by which certain animals form attachments during a critical period very early in life
temperament
a person's characteristic emotional reactivity and intensity
basic trust
according to Erik Erikson, a sense that the world is predictable and trustworthy; said to be formed during infancy by appropriate experiences with responsive caregivers