cross-sectional study
a research design conducted at a single point in time, comparing groups of differing ages to arrive at conclusions about development
longitudinal study
a research design that examines how individuals develop by studying the same sample over a long period of time
lifespan
the entire duration of an individual's life from birth to death, encompassing all stages of development
stability vs change
stability refers to traits and behaviors that remain more or less constant throughout a person's life while change refers to traits and behaviors that are more fluid and flexible throughout a person's life
nature vs nurture
the long-standing debate in psychology about whether genetic factors (nature) or environmental factors (nurture) have a greater influence on human development and behavior
continuous vs discontinuous (stages)
the continuity theory says that development is a gradual, continuous process. On the other hand, the discontinuity theory says that development occurs in a series of distinct stages
teratogen
agents such as chemicals and viruses, that can reach the embryo or fetus during prenatal development and cause harm
reflex-rooting
the tendency for an infant to move its mouth toward any object that touches its cheek
visual cliff apparatus
a research method used to study depth perception in infants and animals where a glass-covered table with a "cliff" edge is placed, creating the illusion of a drop-off, and observing whether subjects avoid stepping off the edge or not
critical period
an optimal period early in the life of an organism when exposure to certain stimuli or experiences produces normal development (āuse it or lose itā)
adolescent growth spurt
the fast and intense increase in the rate of growth in height and weight that occurs during the adolescent stage of the human life cycle
puberty
the period of sexual maturation, during which a person usually becomes capable of reproducing
primary sex characteristics
the body structures (ovaries, testes, and external genitalia) that make sexual reproduction possible
secondary sex characteristics
nonreproductive sexual traits (breasts, hips, body hair, voice)
menarche
the first menstrual period
spermarche
the first ejaculation
menopause
the time of natural cessation of menstruation
sex
the biologically influenced characteristics by which people define male, female, and intersex
gender
the attitudes, feelings, and behaviors that a given culture associates with a personās biological sex
piaget
a Swiss psychologist known for his work on child development. He proposed the theory of cognitive development, which explains how a child constructs a mental model of the world
sensorimotor stage
birth-2 years; 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
conservation
properties such as mass, volume, and number remain the same despite changes in the forms of objects
reversibility
āāsuggests that many developmental changes are not permanent or fixed, but can be modified or altered through intervention or environmental changes
animism
belief that objects that are inanimate (not living) have feelings, thoughts, and have the mental characteristics and qualities of living things
egocentrism
the preoperational childās difficulty taking another personās point of view
theory of mind
peopleās ideas about their own and othersā mental statesāabout their feelings, perceptions, thoughts, and the behaviors these might predict
preoperational stage
2-6/7 years; at which a child learns to use language but does not yet comprehend the mental operations of concrete logic
concrete operational stage
7-11 years; at which children can perform the mental operations that enable them to think logically about concrete/physical events
formal operational stage
12+ years; at which people begin to think logically about abstract concepts
vygotsky
russian psychologist who emphasized how a child would grow to become an adult and come to develop thoughts, behaviors and beliefs
scaffolding
a framework that offers children temporary support as they develop higher levels of thinking
zone of proximal development
what a child can do with help
crystallized intelligence
the accumulated knowledge, skills, and understanding that a person has acquired throughout their life; the ability to use learned knowledge and experience
fluid intelligence
the ability to solve new problems, use logic in new situations, and identify patterns
dementia
a generalized, pervasive deterioration of memory and at least one other cognitive function, such as language and an executive function, due to a variety of causes
phonemes
in a language, the smallest distinctive unit of sound
morphemes
in a language, the smallest possible unit that carries meaning
semantics
the languageās set of rules for deriving meaning from sounds
grammar
in a language, a system of rules that enables us to communicate with and understand others
syntax
the languageās set of rules for combining words into grammatically sensible sentences
cooing stage
occurs between 6-8 weeks, characterized by the production of soft voewl-like sounds, often resembling ācooā or āgooā
babbling stage
the stage in speech developement, beginning around 4 months, during which an infant spontaneously utters various sounds that are not all related to the household language
one-word stage
the stage in speech development, ages 1-2, where a child speaks mostly in single words
telegraphic stage
a child speaks like a telegram (ex. āgo carā) using mostly nouns and verbs
overgeneralization
a cognitive distortion in which an individual views a single event as an invariable rule
ecological systems theory
a theory of the social environmentās influence on human development using 5 nested systems ranging from direct to indirect influences
microsystems
the immediate environment in which an individual directly interacts with
mesosystem
the connections between different microsystems in an individual's life
exosystem
the formal and informal structures that do not directly impact the child but do influence the child through their direct impact on a member of the child's microsystem
macrosystem
the overarching cultural, societal, and economic influences that shape individuals' lives within their environments
chronosystem
all of the experiences that a person has endured throughout their lifetime (environmental events, major life transitions, and historical events)
authoritarian parenting style
when parents merely impose rules and restrictions while expecting obedience
authoritative parenting style
the parents are nurturing, responsive, and supportive, yet set firm limits for their children
permissive parenting style
parents are warm, but lax; they fail to set firm limits, to monitor children's activities closely or to require appropriately mature behavior of their children
secure attachment
infants who comfortably explore environments in the presence of their caregiver show only temporary distress when the caregiver leaves, and find comfort in their return
insecure attachment
infants who display a clinging, anxious attachment, an avoidant attachment that resists closeness, or a disorganized attachment with no consistent separation behaviors
avoidant (insecure attachment)
experiencing discomfort when getting close to others and using avoidant strategies to maintain distance from others
anxious (insecure attachment)
constantly craving acceptance but remaining alert to possible rejection
disorganized (insecure attachment)
parents are warm, but lax. They fail to set firm limits, to monitor children's activities closely or to require appropriately mature behavior of their children
temperament
a personās characteristic emotional reactivity and intensity
separation anxiety
a developmental stage characterized by excessive fear or distress experienced by children when separated from their primary caregiver or attachment figure
monkey studies (cloth vs wire mother)
the need for tactile or contact comfort explains how attachment develops
parallel play
a type of play where children play alongside each other without actively engaging or interacting with one another
pretend play
a type of play where children use their imagination to create scenarios and act out different roles and events
adolescent egocentrism
when adolescents think intensely about themselves and what others think about them
imaginary audience
when adolescents believe they are at center stage
personal fable
the belief that one is unique, destined to have a heroic, fabled, and legendary life
emerging adulthood
a phase of the life span between adolescence and full-fledged adulthood, usually ranging from about 18 to 29 years old. It's characterized by exploration, instability, self-focus, feeling in-between and possibilities
attachment theory (ainsworth)
a psychological model that describes the long-term interpersonal relationships between humans; it suggests that children form an emotional bond with caregivers due to their care and responsiveness
8 psychosocial stages (without erikson name)
trust vs mistrust, autonomy vs shame and doubt, initiative vs guilt, industry vs inferiority, identity vs role confusion, intimacy vs isolation, generativity vs stagnation and integrity vs despair
adverse childhood experiences (ACEs)
severe deprivation or abuse that slows development
achievement identity process
commitment is high and the person has gone through a period of exploring many options
diffusion identity process
a state where individuals lack a clear sense of self and have not made commitments to any particular identity or life direction
foreclosure identity process
when a decision has been made without looking into alternatives
moratorium identity process
when a person is trying out roles or activities in order to fine the most suitable one