Exam 1 Flashcards
Early Civilization for infants
Greek/Romans: harsh to build strong children with morals (infanticide)
China: foot binding
Maya: head binding
Bible: discipline
Middle Ages
teething is illness
Saints for children, use charms to protect children.
BUT, infants left to die for money consolidation. Parents had right to sell children into servitude.
Medical texts in late middle ages (1100-1300)
Few gave advice on childbirth and early infant care
Renaissance (1450-1650)
First written child-rearing philosophies
Enlightenment (18th century)
Emphasized value of children and importance of the body
Childhood time of privilege, children are good, education reform
Rousseau, Romanticism
Infants are tabula rasa, early education important, children need structure and disipline
Empiricism
Locke
19th century
Nuclear family (white)
Medical advances in infant care
Domesticity/full time mother role emerged
Public playgrounds/dolls appear
Charles Darwin (1809-1882)
First to consider infants.
Natural Selection,, infants need to learn skills to survive.
Never studied children himself, but shaped how we think about infancy
G Stanley Hall (1847-1924)
First psychologist in US
Believed Science could help create better individuals and better society
James Mark Baldwin (1861-1934)
Began research program in Toronto on infant psychology where he studied movement patterns and handedness
Nature v. Nurture: Arnold Gesell (1880-1961)
NATURE:
Child study lab @ Yale 1911.
Genetic Maturation
First scientist to use one-way mirror, one of the first to study twins.
Focused on “average” child and developmental milestones.
Ivan Pavlov (1849-1936)
NURTURE
Classical Conditioning
John B. Watson (1878-1958)
NURTURE
Behaviorism
Children can be trained to do anything
B.F. Skinner (1904-1990)
Operant conditioning
NURTURE
Positive Reinforcer
Reward that INCREASES operant
Negative reinforcer
Removing aversive stimulus, INCRASING Operant
All reinforcement
INCREASES likelihood of behavior
Sigmund Freud (1856-1939)
First year important
He and Anna focused too much on NURTURE
recognized infants experience emotions, desires, and need love
First to explicitly integrate nature/nurture
Jean Piaget
Jean Piaget (1896-1980)
knowledge is active process of co-construction
Intelligence is adaption to environment
What we know depends on environment and how environment responds
Stages of development
What theorist associated with maturation?
Arnold Gesell
_____ constructed the theory of attachment, and ____ observed mother-child interaction
John Bowlby
Mary Ainsworth
Interdisciplinary collaboration
Applying research on education, health care, public policy
Stage vs. continuous
Stage- piaget (object permanence)
Continuous- habituation
the interaction of genes with each other and with the organism’s internal and external environment to produce developmental outcomes, such as new structures, behaviors, and abilities
Epigenetics
Ex: PKU, differences in caregiving
Parens patriae
children are viewed as their parents’ possessions; the government may only interfere in extreme circumstances of abuse & neglect
Covers prenatal care for mothers and postnatal care for infants
Medicaid
Food vouchers up to 5 years old
Supplemental nutrition (WIC)
Some financial support to families of children under 3 years
Temporary assistance to needy families (TANF)
Provides tax refunds for working poor families
Earn income tax credit (EIC)
Prevents or protects children from abuse and neglect
State programs of child welfare
Promotes early child development for poor children under 3
Early Head Start
Parents can take up to 12 weeks off work without penalty, but usually without pay
Parental leave
Naturalistic Settings
Home, childcare, school etc.
Research is passive
Event sampling- only what you’re looking for
Narrative record- write what you see
Naturalistic settings have a high ____
External validity
Naturalistic settings need good _____ and can be used for cultural research called ___
operational definitions
Ethnographic research
Laboratory studies
• A specially designed research space that isolates the influence of selected independent variables on dependent variables
Internal validity tends to be high.
Qualitative
Attempting to capture meaning/quality of the behavior while maintaining scientific stance.
The observers focus on the meaning of the situation for participants
The ROLE OF RESEARCH TAKEN EXPLICITY INTO ACCOUNT
Examines situation in broader context
Credibility depends on researcher’s skill, experience, rigor
Quantitative
Representing complex behavioral processes with numerical index (a variable)
Employs stats to analyze data
Collects a small amount of data from a large group of people
Allows generalization to larger population
Case Studies
In depth examination of one child
Baby Biographies- infants’ early development
Single subject: gives researcher more control, but the more unique the child, the harder to replicate
Quasi-experimental (nonexperimental) Studies
Groups of participants are already formed before study
ex: twin studies, alcohol exposure, etc.
Experimental Studies
Random Assignment
IV manipulated
DV measured
Control and Contrast group
Internal validity high
External validity low
Longitudinal:
What is it, examples, cons
Reveals continuity and change within the same individuals over a long period of time, can show long term effects of interventions
Ex: birth weight and reading ability later on
Cons: time consuming, expensive, attrition of participation, practice effects
Cross-sectional
Compares different age groups at one point in time.
Ex: ability of 12/18/24 month old to imitate
Need to be ware of cohort effects (generational differences)
Microgenetic
Documents the process of development over a relatively short period of time. (Example: The onset of walking over a period of months)
Infant research methods (name 3)
- Behavior responses
- Parental report
- Archival research
Paired-preference tests
researchers determine which of two stimuli is preferred by infants
Habituation procedures
decline in looking time over repeated trials of the same stimulus
Response-contingent procedures
Infants trained to change their behavior if they can detect certain features of stimuli and will alter their behavior to receive their favorite stimulus)
Physiological recording and Limitations
Automatic recording- heart rate, respiration, brain activity, hormones eye movements.
Limits: Hard to know precise meaning, hard to say when/where response originates or is encoded in body
Issues in infant research (logistics)
Behavioral State: more likely to cooperate when awake
Inference/interpretation: infants can’t respond verbally to questions.
Issues in infant research (ethics)
since infants cannot provide informed consent to participate in research, their parents must do so
if child can answer questions verbally can give assent (agreement)
researchers must pledge to keep the subjects’ identity confidential & to limit access to their data only to those persons directly involved with the research
Both parents do not always agree about consent
researchers must be careful when communicating any developmental concerns
How to reduce bias
attention to reliability, validity, observer bias, and representative smaples
Conception
Union of ovum and spermatozoon creating zygote
Gametes have __ chromosomes. Most cells have __
23.
46
Genotype
spiral shaped molecules of DNA, which contains genes
Chromosomes work in
pairs
Regions of related genes are called
alleles
Sex linked
23rd chromosomes
color blindness, baldness, hemophilia
Dizygotic Twins
two ova fertilized and two different zygotes develop
Monozygotic
fertilized zygote divides and splits into two separate zygotes
Researchers like monozygotic twins because of the
different epigenetic markers
Measures of fetal behavior
- Spontaneous movement (around 9 weeks)
- Fetal Heart rate (110-180 bmp), used to test cognition, correlation to movements
- Breathing- begins around 10 weeks, increases in frequency
epigenome
biochemical markers that turn on or turn off actions of particular genes within DNA of each cell
Period of Zygote
End of 2nd week zygote to blastocyst. Consists of embryonic disk, sacs, and HCG
human chorionic gonadotropin
inhibits menstruation
endoderm (E)
digestive urinary and respiratory systems
mesoderm (E)
muscles bone circulatory system and reproductive system
Ectoderm (E)
CNS/brain, sense organs, skin, hair, nails, teeth
Yolk sac (E)
produces blood cells, becomes part of liver, spleen, and bone marrow
Amniotic sac (E)
grows to cover the embryo and contains the amniotic fluid (cushions fetus)
Chorion (E)
membrane that surround yolk and amniotic sacs- where placenta forms
Heat beat- Limb differentiation- Faint spine- Rudimentary sensory system- Face development-
(E)
Heart beat- end of 1st month
Limb differentiation- 8 weeks
Spine- 4 weeks
6.5 weeks- sensory system
Face- 5.5-8.5 weeks
Fetus Period
7-16 weeks
(2-3 months)
Fetal-1
Spontaneous movements, changes in glucose/oxygen levels, helps develop nerve endings in sensory receptors.
9 weeks- 2 hemispheres
15 weeks- communicates with sense organs/muscles
16 weeks- 3in/0.5 oz
Thalamocortical projections established- others give birth around now, but humans do not.
External genitals form
When does fetus look human
9 weeks
ultrasounds use
high frequency sound waves
Fetus-2
17-22 weeks
4-6 months
Rapid brain development- subcortical/cortical cells inhibit spasm movements.
24 weeks- movements specialized/control
Hair on body (lanugo)/eyebrows/eyelashes
Vernix caseosa protects skin
Nails/tooth buds
6 months- 2 lbs
Fetus-3
23-36 weeks
7-9 months
Waking/sleep states= active/quiet
20-30%- less, but mom can feel
75% time in REM sleep
Pain between 26-30 weeks
Movement patterns - 8 m thumb sucking, grasping, adjustment movements, fetuses can see, hear, feel, and smell, cry and grunt/yawn
Distinguish voices, prefer certain songs
Prenatal learning
Infertility
about 1/6 couples
unable to conceive successfully for at least 1 year
Female infertility
failure to ovulate (treatable) or the unsuccessful journey of ovum to fallopian tubes (treated by surgery and drugs)
Male infertility
potentially treatable factors (smoking, tight underwear, hot baths, saunas) or by injuries, underdeveloped testes, and some childhood diseases
Enhancing fertility
NFP
good diet/exercise
Medical intervention: artificial insemination/in vitro
Artificial insemination by donor
sperm from donor provided to woman during ovulation
Egg donation
egg from donor is inserted in another woman’s uterus
Fertility drugs
drugs given to stimulate the development and release of eggs from ovary
Gamete intrafallopian transfer
surgical insertion of sperm and egg in the fallopian tube where fertilization occurs
In vitro fertilization
eggs harvested from ovaries and fertilized in petri dish for subsequent implantation
Surrogacy
woman carries fetus from her own egg and donated sperm or zygote from in vitro fertilization
Issues with assisted reproductive tech
Surrogacy: attachment to gestation mother, compensation, child identity
Donating eggs: medical risks, coercison of donors
Good to have older parents?
Cloning
Couple divorces
Embryonic stem cells: when does human life begin.
Changes in mother during pregnancy
Failure to menstruate
80%- nausea/vomiting (adaptive, prolactin/estradiol, help avoid bad food)
Fatigue/frequent urination
20% do not get prenatal care during 1st trimester
weight gain 25-35 pounds
placenta
secretes hormones that nurture the fetus and prepare the mother’s body for birth and that induce changes in breasts to become ready for lactation
Colostrum
yellowish liquid high in protein/antibodies that is first food for infant may be secreted by 4th month of pregnancy
Nutritional Requirements
Micronutrients, vitamins, minerals
Folic acid, b9, zinc, iodine
Healthy nutrition (micronutrients, omega-3s) and weight gain are essential
Exercise during pregnancy
Moderate exercise- fetal neurodevelopment
Intense exercise only during first trimester
Brain growth in some areas
hypothalamus, amygdala, parietal cortex, prefrontal cortex
Mothers- successful adaption to pregnancy
knowledge of pregnancy and childbirth
presence of father
marital satisfaction
low levels of family stress
Social support from friends and family
Ability to remain active
emotional well-being
stress reduction
Fathers- successful adaption
Emotionally distant/cheating/abuse (1/6)
Better if knowledge, social support, marital satisfaction, low levels of family stress, emotional well-being
Siblings- successful adaptation
preparing a first child for the second DOES NOT WORK
Conflict between mom and first child predicts more interfering behavior of the first child with new baby
Most defects occur
1st trimester, organs developing
Two main types of birth defects
- structural defects
2. Defects resulting from genetic and chromosomal abnormalities
Neural Tube Defect
1st month
Spina bifida/Anencephaly
prevent by folic acid before and during pregnancy
Spina bifida
spinal columa doesn’t close completely.
Nerve damage/paralysis
Anencephaly
most of brain/skull don’t develop
Death
Congenital heart defects
structure of heart
MOST COMMON BIRTH DEFECT
3 types of genetic disorders
- Single gene
- chromosomal
- complex
Single gene: Cystic fibrosis
inherited. buildup of sticky mucus that can damage the body’s organs.
Autosomal recessive
Sickle cell anemia
hemoglobin
slow blood flow
autosomal recessive
Marfan syndrome
connective tissue
heart, blood vessels, bones, joints, eyes
Huntington’s disease
progressive brain disorder caused by defective gene
symptoms 30-50 years.
defect is dominant
Chromo: Turner’s
missing/incomplete X
Girl’s short, ovaries don’t work
Chromo: Klinefelter syndrome
XXY on sex chromosomes (occurs in men)
infertility/small testicles
At what age of genetic/chromosomal errors more common?
Mother 35+
Fathers 40+
Study of birth disabilities and behavioral problems from environmental influences during prenatal period
Teratology
ex: alcohol drugs, radiation, disease
Thalidomide (tranq)
Heart defects, missing limbs
DES hormones
vaginal cancer in girls and sterility and genital abnormality in boys
Tertogens: what makes it worse
2/3 during 1st trimester
risk in embryotic when organs forming
Fetal Alcohol Syndrome
44% higher risk in heavy drinkers
1/3 per 1,000 births in US
mental retardation, facial abnormalities, hyperactivity, growth retardation, more premature births & miscarriages, lower birthweight,
heart defects
Smoking (tabacco)
respiration problems, antisocial, learning, excitability, gastrointestinal, obesity, asthma
lowers sperm count
passive smoking hurts too
effect of lower birth weight same regardless of who is smoking (mom or dad)
Cocaine
Low birthweight
circulatory/respiratory/urinary problems
Sudden infant death, attention difficulties, language delay
other problems due to environment
Maternal depression
9-14% during pregnany
35% take SSRIs, no birth defects
Maternal anxiety/stress cortisol effects on fetus
fetuses higher activity level, cry more as infants and difficult emotion regulation
more likely to have ADHD/anxiety/low IQ, mental illness
Maternal Illness: Diabetes
extra sugar, large babies, birth defects/miscarriage
Maternal Illness: Rh disease
mom rh-
baby rh+
firstborn babies not effect, but bad later
Maternal illness: rubella (german measles)
mother during embryonic period, birth defects
Zika
microcephaly
AIDS
risk reduced if antiretrovirals
Paternal influences associated with tetrogens
lower sperm count/abnormal sperm
Cocaine risk birth defects
smoking leads to lower birthweight and childhood cancer
Amniocentesis
sample of amniotic fluid
Chrorionic villus sampling (CVS)
diagnosing wider range of disorder
Preimplantation genetic diagnosis PGD
detect genetic disorders early
prenatal screening
terminate healthy child that does not meet expectations
CRISPR
Gene editing tool for correcting disease mutations
Teen pregnancy risk
Poor, low academics, end in divorce, children prone to delinquency
Birth defects, infant death, low birthweight
Prevent teen pregnancy
internal locus of control
academic achievement
life choices/poverty alleviation
conception/contraception
Babies expected to be born
280 days from last menstrual period
Timing of birth controlled by
CRH
3 stages of labor
- opening of cervix
- Passage through vagina
- birth of placenta
Opening of cervix
dilation widening to 10 cm.
Effacement- thinning of cervix
loss of mucus plug.
Latent phase- spaced contractions
active-intense/frequent
Delivery of Infant
gradually pushed out head first
placental expulsion
placenta separates from uterine wall and is expelled through final set of contractions
remaining tissue could cause postpartum hemorrhage
After expulsion, placenta examined for abnormalities
Induction of labor
hormone stimulates uterine muscles
Fetal monitoring
only for high risk deliveries
Forceps
may cause brain/spinal cord injuries, used only during early phases of labor (high forceps)
Vacuum Extraction
soft/rigid cup with handle and vacuum pump applied to baby’s head to help guide baby out of canal
risks lower than with forceps
Risks of drugs
mothers might have fevers, not remember birth, newborns high temp, cried more, slow to respond, affect organs
C-sections
Approx. 1/3 of births were C-sections in 2015.
Save lives, but risk- of infection/stress. longer to heal
no ill effects
a practitioner who has been trained to assist women who are giving birth. They also offer pre- and postnatal care. They often work alongside doctors
midwife
works alongside doctors and midwives to offer emotional support during labor and delivery
doula
The Newborn Appearance
covered in vernix caseosa, lose weight due to loss of meconium and drinking colostrum
brain doubles in size, myelination during first year. Born with all nerve cells
Screening Assessments
APGAR
indication of newborn’s ability to survive, immediate medical needs
Neurological assessments
problems with CNS/PNS, major brain/spinal cord or sensory damage
Behavioral Assessments
used to rate presence and strength of behavior responses to stimulate spontaneous activity
Dubowitz scale
used when infants born preterm to estimate gestational age
NBAS
examination used w/infants to assess reflexes/social behaviors
Useful for screening instrument for gross neurological dysfunction
Newborn behavioral observation (NBO)
structured set of observations designed to help clinician and parents. Identify kind of support infant needs for his successful growth and development.
Perinatal period is 1 month before birth to 1 month after: problems?
disorder of delivery, infections, asphyxia, hypoglycemia, etc.
3-5 children show severe developmental problems before school- 85% due to prenatal/perinatal causes
Short term effects of prematurity
Newborn death, esp. ELBW babies
More likely to have lack of oxygen during birth, jaundice, physical/mental impairments
Gestational age is better indicator of developmental status than birth age (feeding/sleeping)
34 weeks- the age at which premature infants show increase in ability to respond to stimulation
Long term effects
shorter/smaller than full-term individuals (catch-up growth: more rapid growth than term infants)
deficits until adolescence: behavior, cognition, language, motor, emotion, at risk for illness
Kangaroo care
skin-to-skin contact
Premature
vestibular-proprioceptive stimulation
Successful intervention depends on gestation age/health
open beds, low lights, gentle touch, pain control, monitor oxygen
postdate birth
weight more
problems due to malnutrition or oxygen deprivation due to placenta aging
Macrosomic
weight more than 8lbs 13oz
Spontaneous abortions
embryo stage (up to 8 weeks)
Stillbrith
Full-term infant who dies before or during delivery
Perinatal death biggest causes
- poverty
- Disease
prevent by supplemental nutrition for mothers/infant, breast feeding, growth monitoring, rehydration, immunization
Are basic brain connections laid down b4 birth?
True
Greatest density of brain cell connectors
by age 3
After age 3 does window close
no
majority info comes from
animal research
Glial Cells (support cells)
perform a variety of critical support functions.
more numerous,
provide oxygen, remove waste, myelin
white matter
Brain stem
ANS- respiration, heart rate, bp, sucking, swallowing, digestion
Cerebellum- balance, posture, coordination
Sympathetic Nervous system
prepares the body for action
Parasympathetic Nervous system
allows body to relax
Limbic System
emotion, memory, regulation
hornmones
Amygdala, hippocampus, hypothalamus,
Thalamus- attention span, sensing pain,
Stress
Amygdala, hypothalamus, pituitary adrenal
Hypo: CRH
pit: ACTH
Adrenal: Cortisol
Frontal Lobe
The frontal lobe is one of four lobes in the cerebral hemisphere. This lobe controls a several elements including creative thought, problem solving, intellect, judgment, behavior, attention, abstract thinking, physical reactions, muscle movements, coordinated movements, smell and personality.
Parietal Lobe
Governs spatial processing and integrates sensory input with information in memory. Located in the cerebral hemisphere, this lobe focuses on comprehension. Visual functions, language, reading, internal stimuli, tactile sensation and sensory comprehension will be monitored here.
Sensory Cortex
, receives information relayed from the spinal cord regarding the position of various body parts and how they are moving. This middle area of the brain can also be used to relay information from the sense of touch, including pain or pressure which is affecting different portions of the body.
Temporal Lobe
involved in memory, visual recognition, and processing of emotion and auditory information. The temporal lobe controls visual and auditory memories. It includes areas that help manage some speech and hearing capabilities, behavioral elements, and language. It is located in the cerebral hemisphere.
Wernicke’s Area
temporal lobe
understand speech
Broca’s
facial neruons, understand speech and language
located in triangular and opercular section of intferior frontal gyrus
What lets us voluntarily regulate body states and behaivor
prefrontal cortex
by time baby born
50% prental neurons died
2nd half development
synaptogenesis
initial wiring of brain complete by
7th month
fetuses begin to feel pain and control movement
Experience Expectant neural pathways
prepare infant for survival
more or less fully developed at birth allowing infant to adapt to environmental stimuli
Brain is expecting specific experiences, for which specific skills are best adapting (pain=crying)
Experience dependent neural pathways
Pathways and regions that are not fully formed and need environment stimuli to develop
Most important factor regulating individual differences in brain development
Stress
When does stress occurs?
can’t find balance between sympathetic and parasympathetic nervous system
__ is result of prolonged sympathetic activiation in depletion of boidly resources
trauma
nonconscious evaluation of environment
neuroception
Cortisol when
prolonged SNS
suppression PNS