Life Span and Development Flashcards
What is the function of chromosomes
To carry hereditary traits children inherit from their parents
How many chromosomes are there
There are 46 total chromosomes
23 from the mother’s ovum
23 from the father’s sperm
What is a genotype
An individual’s complete genetic makeup, including traits in
recessive genes
What is a phenotype
An individual’s expressed characteristics (green eyes, red
hair)
What are carriers
Traits that are in our genotype but unexpressed as a
phenotype
What is a dominant-recessive trait
One gene pair is dominant and controls the trait.
The recessive gene is in the genotype but not part of the
phenotype
What are polygenic traits
Produced by interaction of many traits
What 2 things must happen to have a trait become a
Phenotype
2 levels of interaction must occur
1 Gene-Gene Interaction
2 Gene-Environment interaction
In a dominant-recessive pattern, what controls the trait
One gene pair is dominant and controls the trait
Recessive gene is in genotype, not part of phenotype
An example of dominant-recessive pattern is
Brown eyed father
Blue eyed mother (brown eye gene)
Hypothetically, 1 in 4 chance child will have blue eyes
3 in 4 chance children will have brown
Incomplete dominance
The phenotype is not completely controlled by the gene.
The gene does not completely control the trait
Where are X-linked genes located
On the X chromosomes
Where would a disease that is X linked be obtained from
The mother
Monozygotic twins occur when
One zygote splits and forms two identical clusters. Also
known as identical twins with identical genes
Dizygotic twins occur when
Two ova are fertilized by two separate sperm around the
same period
How often do Monozygotic births occur
About 1 in every 270 pregnancies
How often do Dizygotic births occur
About 1 in every 60 births
Chromosomal abnormalities are
When a baby is born with an abnormal number of
chromosomes 45, 47 or more. Occurs in 1 out of 200 births
Characteristics of Down syndrome
Involves an extra chromosome on the 21st pair
Has characteristics such as thick tongue, round face, slanted
eyes, short limbs, also slow to develop
Down syndrome
Is also known as trisomy 21. It is the most common
chromosomal abnormality
Involves an extra chromosome on the 21st pair
Characteristics: thick tongue, round face, slanted eyes, short
limbs, slow to develop
Phenylketonuria (PKU)
Involves abnormal ingestion of protein. Occurs in 1 out 500 births, 1 in 100 European Americans mainly of Norwegian decent It is caused by a recessive gene Can be prevented through diet Can be prenatally detected
Kleinfelter syndrome
Sufferers have an XXY chromosomal pattern
The individual has a seemingly male appearance, secondary
sex characteristics are not present
Fragile X syndrome
Involves part of the X chromosome attached thinly, ready to
break off.
Caused by mutated gene that contains A DNA sequence
CGG that is repeated 200 times, nl is 30
What are the domains of development
The biosocial domain includes brain, body changes and
influences that guide them
Cognitive, includes thought process, perceptual abilities,
language mastery
Psychosocial, includes personality, emotions, interpersonal
ie., family, friends
Bronfenbrenner
Focus on external factors, proposed that ecological approach
was best.
Devised ecological model that surround the individual
Ecological model parts
Macrosystem-Cultural values, customs, social conditions,
Exosystem-Mass media, community, schools
Microsystem-Family, peers, classroom
Mesosystem LINK between each
Cohort
Group of people born within a few years of each other.
Have same options, priorities and constraints
Hereditary-Environment Debate
Also called maturation-learning debate
Focusses on answering how much of any pattern or trait is
determined by genetic factors and by environmental
influences
Nature
Includes range of abilities, limitations and traits ie., eye
color, blood type, inherited disease.
Also intellectual, personality traits as skills with numbers,
sociability, depression
Nurture
Environmental influences that happen after conception, ie.,
mother’s health during pregnancy, all experiences ie., culture,
community, family, school
Scientific method
1 Formulate research question 2 Develop hypothesis 3 Test hypothesis 4 Drawn conclusions 5 Make findings known
Naturalistic observation
When subjects are watched in their natural environment, ie.,
home, school
laboratory observation
Act of watching and recording what people do in certain
situations
Independent variables
Controlled by the scientist, values to be used are determined
prior to experiment
Variables
Major part of experiments, have at least 2 values and can
refer to qualities, conditions, behaviors, traits or events
Experimental and Control group
The group exposed to the treatment or condition =
Experimental
Control = Not exposed
The scientist controls what type of variable
Independent
An experimental research considers what causes
Psychological experiences
Behavioral changes
Physiological processes
To discover the reasons people change and the reason they
stay the same, developmental research is conducted utilizing
what two research designs
Cross-sectional research
Longitudinal research
Cross sectional research is
A research that works with groups of subjects of different
ages but who are similar
Longitudinal research is
When the same group is observed for a certain length of time
Sequential research is
The use of both cross-sectional and longitudinal methods
together - Also called Cross-sequential, sequential,
time-sequential
Two of the most prominent aspects of ethics in research are
Informed consent-Scientist must explain
Privacy-Information from subject must be kept confidential
Deception is
Used to decrease subject bias, meaning the subject is not told
they are being studied or not given the real reason for the
study
Ethology is defined
As the study of the natural unfolding of animal behavior
Who was Bowlby
A human ethology researcher, who considered attachment
behavior - Loss of proximity to the object of attachment
produces anxiety (ex: mother-infant attachment)
What is psychoanalytic theory
Considers human development in terms of intrinsic drives
and motives
Who were Vaillant and Levinson
Psychoanalytic theorists who believed human intrinsic drives
and motives to be the basis for universal stages of
development
Vaillant studied
Pessimistic explanatory styles of depressed people and came
to the conclusion that these people blame unpleasant events
to something of themselves
Freud was
Founder of psychoanalysis
According to Freud, the mind is separated by 3 levels which
are
Conscious - Mental experiences that can be recalled
Preconscious - Memories and perceptions can be recalled at
will
Unconscious - Bottom layer of feelings and memories cannot
be recalled at will
The 3 structures of personality as defined by Freud are
The Id - Symbol of unconscious, contains inherent biological
drives
The Ego - Focuses on reality principle, guides individuals to
express sexual, aggressive impulses
The Superego - Contains the conscious, gives individuals
extreme feelings of guilt
Psychosexual stages defined by Freud
0-1 ORAL - weaning single most important behavior
1-3 ANAL - toilet training
3-6 PHALLIC - pleasure from genitalia
7-11 LATENCY - friendship and social skills
12-Adult GENITAL - focus of pleasurable feelings
Erickson viewed unconscious and early childhood as
important, his focus was
Psychosocial development
Proposed 8 developmental stages
The 8 Stages of Erickson
0-1 Trust-Mistrust 2-3 Autonomy-Shame + doubt 4-5 Initiative-Guilt 6-11 Industry-Inferiority 12-18 Identity-Role confusion Young Adult Intimacy-Isolation Middle Adult Generativity-Stagnation Late Adult Integrity-Despair
Watson studied
Behaviorism - Declared that to make psychology a true
science, the things that could be seen and measured should
be studied
Pavlov was known for
Classical conditioning
His experiment involved a dog, a bell and food
Concluded that if bell sounded before hungry dog given
food, dog would salivate at sound of bell
Food=Unconditional stimulus
Salivation=Unconditioned response
Bell=Conditioned stimulus
Complete Process was termed classical conditioning (aka
respondent conditioning)
Skinner
Most influential supporter of learning theory,
Father of operant conditioning
Types of Reinforcement
Positive-Presence of an event that increases behavior
Negative-Strengthens a behavior by the negation of an
unpleasant event
Punishment
An event that decreased the likelihood of a response
happening again
Positive reinforcement example
Train a dog to retrieve newspapers and giving it with a
reward once object is returned
Negative reinforcement
example
Carrying an umbrella when you know it is going to rain
therefore avoiding getting wet
Thorndike
Law of effect, animals repeat responses but not punished
responses
Bandura
Most influential researcher for the alternative theory to
operant conditioning-social learning theory.
Individuals can demonstrate learned responses from
observing others
Maslow
5 tiered hierarchy of needs Physio Safety Belonging & love needs Esteem Self actualization First 4 are deficiency needs
Case & Bruner (Infants & young children)
Piaget (Cognitive dvlp theory)
Infant-Sensorimotor (senses, motor)
2-Preoperational-Think symbolically
School age-Concrete operational-Think logically
Adolescent & Adult-Formal operational-Think on many
planes, hypothetically, abstractly, speculative
Postformal-5th stage-allows adults to solve real world
problems
Vygotsky
More value than Piaget on influence of social experience on
cog dvlp
Language single most important means of learning
Proposed ZPD (Zone of proximal development) range of
skills that can be used without assistance versus what can be
obtained with help
Brofenbrenner
Ecological approach best solution to studying human development. Remember Macrosystem-Cultural values Exosystem-Media Microsystem-Family Mesosystem-Link between each Microsystem
reflexive behavior
Coughing, blinking, seeking a nipple when cheeks are
touched
Neurons
Nerve cells of the CNS present at birth
Axons
Nerve fibers that transmit impulses from neurons to
dendrites
Dendrites
Nerve fibers that interconnect neurons and receive impulses
transmitted from one neuron to another via their axons
Physiological states
Refers to levels of physiological arousal
Quiet sleep
When breathing is slow and regular
Active sleep
When facial muscles move and breathing is somewhat
irregular with some rapid breathing
Alert wakefulness
When breathing is regular and the infant’s eyes are bright
Gross motor and fine motor skills
Gross =large body movements
Fine = Small body movements
Reflexes
Involuntary responses to particular stimuli
Three sets of reflexes necessary for life
Breathing
Sucking
Rooting
Other reflexes important to development not for survival
Moro-Flings arms out and back
Babinkski-Big toe will turn inward when feet stroked
Plantar-Toe flex (6 weeks of age)
Stepping-Like walking (3-6 wks)
Stimulus to the sensory system causes
Sensation response ie, hearing
Perception
Mental processing of sensory information ie, brain trying to
make sense of sensation
Perception=Putting it all together
Eyesight
Least developed sense at birth
Binocular vision
Both eyes focus on same thing
About 14 wks
Newborn weight doubles within first few months of dvlp
Requires feeding 3-4 hrs around clock
Breast milk contains
More iron and Vit A and C than cow’s milk
Contains antibodies against some diseases
Hormones to regulate certain functions
Marasamus
Infant does not get necessary nourishment needed to sustain
life
Kwashiokor
Lack of protein, characterized by bloating in face, legs and
abdomen
Sensorimotor stage
Cognitive development which begins in infancy
Babbling
Universal among infants regardless of culture
Motherese
High pitched baby talk with a simplified vocabulary, shorter
sentences and low to high fluctuations
Schema
Piaged used the term to explain a mental model that an infant
forms to help make sense of the characteristics of people