Teratogens
chemical and viruses, that can reach the embryo or fetus during prenetal development and cause harm
Habituation
decreasing responsiveness with repeated stimulation. As infants gain familiarity with repeated exposure to a stimulus, their interest wanes and they look away sooner.
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 understandings to incorporate new information
Sensorimotor stage
In Piaget’s theory, the stage (from birth to nearly 2 years of age) during which infants know the world mostly in terms of their sensory impressions and motor activites
Object permanence
the awareness that things continue to exist 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 operations 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.
Critical period
an optimal period early in the life of an organism when exposure to certain stimuli or experiences produces normal development
Imprinting
the process by which certain animal form strong attachment during early life
Self-concept
all our thoughts and feelings about ourselves in answer to the question
Gender identity
our sense of being male, female, or some combination of two
Social learning theory
the theory that we learn social behavior by observing and imitating and by being rewarded or punished
Secondary sex characteristics
nonreproductive sexual traits, such as female breasts and hips, male voice quality, and body air
Cross-sectional study
research that compares people of different ages at the same point in time
Longitudinal study
research that follows and retests the same people over time