developmental psychology Flashcards
Normative age-graded influences
on development eg.
. puberty, starting school
d,e,o
aims of developmental psych….
describle, explain and optimise development.
when does human development begin?
at contreception
a ….. period is considered a time in dev when a certain experience must occur for the organism to develop
critical
attatchment theory
bowlby used the term ‘secure base’ to refer to…
the presence of an attatchment figure
the term senescence describes…
biological ageing
baltes model of development…
1
2
3
normative age- graded influences
normative history-graded influences
non-normative life events
Normative history-graded influences
on development eg.
covid, WWII, natural disaster
Non-normative life events on development eg.
personal….death of parent, serious injury
baltes model … 1,2,3
How do we test for these influences on development?
Age
Cohort
Time of testing
Cross-sectional studies
…participants
…ages
…historical time
positives
negatives
Different participants, different ages, same time
Cost effective
Quick
Confounds?
Ex: Individual differences? (dif many not be due to development but individual experiences eg. trauma) Cohort effects?
Ex: 30-, 60-, 90-year-olds?
Longitudinal design
…participants
…ages
…historical time
positives
negatives
Same participants, different ages, different times
High attrition rate (ppl drop out)
Time-consuming
Original research question still viable at study completion?
Confounds?
Ex: Biased sample?
Cohort Studies
…participants
…ages
…historical time
positives
negatives
Different participants, same ages, different historical time
ex: look at 8 year olds but all from dif generations, so every 10 years test a 8 year old
Time consuming
Danger of research question becoming obsolete
Confounds?
age of child?
Cohort Sequential Design
…participants
…ages
…historical time
positives
negatives
mix of longitudional and cross sectional…
unlikley…
Different AND same participants, different AND same ages, different AND same historical time
Ex: effect of preschool programmes on children born in 1990, 2000, 2010, follow them from 3-12 years of age.
High attrition rate
Time consuming
Question may become obsolete
twin studies
Monozygotic twins
Dizygotic or Fraternal
dif between 2 being treated…
tend to be adopted…
(~100% identical)
(50% identical)
identical twins treated more similary compared to non-identical
tend to be adopted into similar environments
adoption studies
what it does
drawbacks
cross-fostering expermint is when..
Rearing environment from adoptive parents
Genetic inheritance from biological parents
Whom do they resemble most?
Drawbacks?
- seperate twins to dif families for research of nature/nurture
- Cross-fostering experiments ( cant do with children.. obvs so do with rats and mice..)
dif between cross-fostering experiment and adoptive studies
same aim but cross is unethican and very controlled wheras adoptive the experimenter has no control of where they go they just observe (problem is they tend to go to a similar fam)
Evolutionary Psychology
looks at…
but we to look at chimps not humans becausee…
whether human ancestry tell us about ourselves now?
they dont have cultural ‘standards’. certain expectations effects human behaviour, social roles.
hard to control cultural diferences
Evolutionary Developmental Psychology
Cross-cultural influences
example= Motor milestones
cultural practices impact development defo
How does culture affect developmental views
issues with psych studies…
USA is most studies so cant be universal
W.E.I.R.D science
all psych is westernised
we dont test all cultures
not universal
weird acranim…
western, english speaking, industralised, rich, democratic
Sensation is when info about …. picked up by …. and transmitted to …
lecture 2
environment… sensory receptors… brain
Perception is interpretation by the … of this input
How we … the events, objects and people in our environment
brain…understand
Visual perception development
Visual acuity (sharpness of vision) is …. at birth, rapid increase in first …
Near adult levels by …
poor… 6 months… 1 year
Visual scanning (looking around for info)
Younger than …, cannot track moving objects smoothly
… month: focus on limited features of shape, particularly outside edges
… months: start to focus on internal features
2 months… 1 … 2
colour vision
…. can distinguish between white and red, but not other colours (ex: Adams et al. 1994)
Around … month, look longer at brighter, bold colours
By … months close to adult ability
newborns.. 1 .. 4
How do we test perceptual abilities? (aka senses)
Preference tests
Habituation tests
Conditioning
preference tests is when you …
.Present two stimuli at same time
Measure how long infant looks at each
Does infant look at one more than the other?
Infant can discriminate between stimuli
in Habituation Tests ppl are
Shown interesting stimulus repeatedly
Infant loses interest eventually (habituation)
Change to a different stimulus
Infant shows renewed interest and looks again (dishabituation)
If so, the infant can tell the difference
Conditioning is when you … for eg…
Repeatedly reward target behaviour
Ex: increase sucking rate, get specific stimuli
Infant becomes habituated to stimulus
Stimulus is altered (ex. HAS procedure)
If infant does not increase sucking rate treats 2 stimuli as the same
Does increase sucking rate distinguishes between 2 stimuli
face perception
infants are born with …
1. innate…
2. recognition for…
3. sensitivity to…
4. imitation…
Innate Attraction
Recognition of Face Patterns
Sensitivity to Emotions
Imitation and Social Interaction
Most individuals reach peak face perception abilities in ….
early adulthood
What can you tell from a face?
Species
Sex
Race
Identity
Mood, Emotional state
Intent, truthfulness
Theoretical Approaches
Nativism:
Empiricism:
abilities from birth – innate, inborn (faces organized at birth
)
acquire overtime through experience – learned (Perceive faces as they perceive other objects
becomes specialized after experience)
Fantz (1961):
1-15 wk old
Innate Face Preference? children prefer…. over … faces
complex… simple
innate face preferences?
Maurer and Barrera (1981): add controls for complexity
…month: no difference in looking times
…months: looked longer at “natural face”
1…2
innate face preferences?
Goren et al (1975)
Used moving stimuli instead of static
Newborns tracked … face more than other two
schematic (normal)
Early face preference?
Johnson et al (1991)
Replicated effect with newborns
By …. months, no longer track any face more
Why does this face preference vanish?….
3
… cognitive development, exposure, and the maturation of perceptual abilities.
Johnson and Morton (1991) 2 process model: shows…
infants develop their ability to perceive faces over time through two distinct systems: …. and …..
early system= …. which help newborns quickly and efficiently detect and respond to face-like stimuli in their environment. which is needed for social interaxctions such as….
brain regions….
later system= …. which relies on the ….. for more precise recognition of faces. develops as infants gain ….
brain regions…
CONSPEC and CONLEARN.
conspec
bonding with caegivers (attatchment theory)
amygdala and the brainstem
conlearn
visual cortex
…experience and exposure to their social environment.
fusiform gyrus
What else can newborns do?
Recognize …. (Turati et al., 2008)
Recognize ….. (Farroni et al., 2002)
Look more at direct than averted gaze
Recognize …. (Field et al., 1982)
Infants dishabituated when expression changed
identity of novel individuals
eye-gaze
expressions
what else can infants do?
Prefer …. (Slater et al. 2000)
Newborns < 1week old looked longer at…
Discriminate …. (Bushnell, 2001; Pascalis et al, 1995)
Ex: Walton et al (1992)
Sucked more to keep ….’s face on video
1-4 days old!
attractive faces
mothers face
How are they doing it?
Pascalis et al. (1995)
Preference for mother’s face disappeared when ….
Newborns use …. to identify
Turati et al. (2006)
Could use both outer and inner features
outside of face and hairline masked
outer features
as we get older there is a narrowing of the ……
face-perception skills become more …
perceptual window
specialized
Pascalis et al (2002)
….m infants could discriminate between monkey faces and human faces
…. m infants and adults could only discriminate between human faces
** If exposed to monkey faces, ….ms could discriminate (Pascalis et al 2005)
6 months
9 months
9
Sugita (2008)
Monkeys not exposed to faces
Before exposure: able to process ….
After exposure: only retained the ability to discriminate between the….
both monkey and human faces
face types they’d been exposed to
“Other-race” effect is that adults are…
and proof is that 3 month olds…
..worse at discriminating faces of other races compared to own race (Tanaka et al., 2004)
3m old, but not newborns, prefer own race faces (Kelly et al 2005)
Sangrigoli et al (2005):
Korean adults adopted between 3-9y into Caucasian families were better at …
eg of the …
recognising caucasian faces.
effect of the environment and the other race effect
Quinn et al. 2002/8)
3 month olds prefer faces of the gender that was their…
primary care giver
Wismer Fries & Pollak, 2004
Institutionalized children (care homes etc…) showed defecits in…
in identifying emotions in faces
(Pollak et al. 2000)
Children raised in abusive environment show bias for …
angry faces
adults can recognize faces as familiar within….
0.5s
Retain info of large number of faces for example
….% recognition of yearbook photos
Class size of up to 900, up to 35 years later
90%
So if adults are experts at face perception, when does this expertise fully emerge?
Some research suggests not until 30+ years for face learning/recognition
Late maturation vs. Early maturation
Two key theories:
Face specific perceptual development theory:
General cognitive development theory:
Ongoing development of face-specific perception mechanisms; continue to develop into late child and adolescence
Face perception gets better because of increased exposure/experience with faces
face perception matures early (4-5 yrs?)
performance increases later as general **cognitive mechanisms improve
**
Disproportionate inversion effect is when the ability to recognize …
which highlights…
faces is disproportionately impaired when the faces are presented upside-down (inverted) compared to non-face objects
highlights the specialized nature of face processing in the brain, as the inversion of faces disrupts recognition more significantly than it does for other types of stimuli, like houses, animals, or objects.
Holistic/configural processing is how the brain processes…
… faces by focusing on the entire structure (H) and relationships between facial features (C) rather than processing individual features in isolation
Code spacing between face and features
Susilo et al. (2013)
Tested over 2,000 18-33 year olds
Controlled for non-face visual recognition, sex & own-race bias
and showed….
Conclude results support
….
Positive association between age and facial recognition abilities
“late maturation hypothesis”
Neurodivergent face perception
indiv with autism spectrum disorder find it hard to…
Recognizing familiar people
Remembering faces
Interpreting eye-gaze and emotions
ppl with William’s Syndrome find it dificult to…
Process unfamiliar faces atypically
Prolonged face gaze (Riby et al. 2008)
Prosopagnosia (face blindness)
Damage or abnormalities in ….
Congenital prosopagnosia – from …
right fusiform gyrus (stroke, brain injury)
birth, appears to run in families
executive functions are a …. process like the …
lecture 3
top down.. central executive
(Miyake et al., 2000)
domain general construct..
3 core processes of the executive function are….
which mean….
inhibition- ability to control attention
working memory - ability to hold items in mind and then process info at the same time, info processing. hold info in mind while processing other info
cognitive flexability- ability to switch tasks, change attention
what is executive function?
a set of mental skills that help you manage your thoughts, actions, and emotions to achieve goals. These skills include self-control, staying focused, planning, and adapting to new situations. They are important for tasks like organizing, problem-solving, and making decisions.
overview of measuring …
how do we measure executive functions?
a cog psychologist….
vs a developmental …. problem…
takes measures based on adults and applies to children
vs
creates age appropriate tasks so you can follow development. problem… so have lots of tasks and lots of people trying to find out how they continue to develop
1) measuring executive function
(dev)
= inhibitory control
eg. fish
congruent and incongruent options..
looking for childrens ability to…
so basically inhibibitory control is when…
congruent option= fish all facing same way to middle
incongruent= fish all facing diferent direction to middle
.. inhibit that responce for the incongruent trial. (not make the mistake) Rt will be slower as trying to inhibit that responce.
you give children a task where they have a incongruent task and time how long it takes for them to inhibit /supress the wrong responce.
loads of dif tasks
Wiebe et al. (2012):
inhibitory control shows graded performance meaning that…
from 3-6 years old the accuracy increased by 30%
ability of inhibitory control is still developing …
in adolecence, into 20’s. decrease in erros, become better and more effcient at supressing wrong.
2) measuring executive function
= working memory
eg. complex span tasks are when…
give them a sentance and they have to end the sentance for you. eg. i like to eat fish and ….. (hope=chips), hold that answer in mind. then a baker makes a loaf of …(hope=bread) then asked ro recal these 2 items in serial order.. chips… bread.
(have to hold words in mind while processing sentances)
2) measuring executive function
= working memory
eg. the backward digit span is when…
at age of 6 months have capacity of ….
and at 1-10 years have capacity of… items
somone says numbers to you and you have to repeat them back starting with the last item. eg. 3,4,5. i say 5,4,3.
1 item
2/3 items
- individual diferences
- dif processes happening for working memory to work/hit 3 items.
3) measuring executive function
= cognitive flexability (ability to shift)
eg. dimensional change card sort test
0-3 dont have this…
what age do they achieve this?
sort by item or colour eg. red car and blue baloon. if its colour put blue car in the blue section not the baloon, then change.
when change rule they will carry on with the first rule of the colour for a while until they have a lightbulb moment.
cognitive felxability, as get to 4.5 they are able to achieve this
Ferguson et al., (2021)
took data from all executive functioning tasks (adding…)
found have very diferent ….
controlled for IQ and SES which is good because..
inhibition and working memory look…
moral of this is it teaches us…
… stroop and tower of hanoi
trajecturies for each of these diferent processes.
… IQ and age are inherintly correlated and its linked to general cognitive perofrmance so want IQ to all be similar so its not affecting what the study is acc about. same as SES (lower SES= lower ability) want to see TRUE EFFECT
.. similar accross the life span
whilst all these papers are trying to pin trajecturies together you cant.. as its all very diferent across the lifespan.
3) measuring executive function
= cognitive flexability (ability to shift)
eg. the wisconsin card sorting task. (more complex more dimensions)
7-21…
15 yo did not …
same thing happening, rule will change but not told rule is going to change. you have to work it out when they say its wrong. testing ability to notice switch rules.
shift costs decrease
differ form adults.
domain specific=
domain genral=
= if you measure 1 its not going to effect the other
= 1 can effect another
correlation table stars mean they are…
more stars by every measure means…
significantly related
.. there all pretty related/ strong evidence in children there all correlated.
Wu et al., (2011)
think theres a 3 factor model (3 factors- factor analysis) which are…
all highly related to eachother
shifting, working memory, inhibiton
at diferent stages process can be predicted by diferent things
eg. tower of hanoi
executive function is predicted by …. and 4 yo
and after that its predicted by…
why is this???
at 4 its predicted by inhibition
older its predicted by working memory
dif parts are developing at dif rates, inhibition is more mature at 4 so it predicts the behaviour.
what you believe on most psychology things is your choice based on…
which studies you believe to have done the most reliabe best study with controlls. if theres dif stuff being found in dif studies work out which study you believ to be the best.
when born brain is so highly connected everythwere then it is …
refined
brain facts
6-7 brain ia about …% of an adult brain so has matured alot.
…. is last to develop
early years occipital lobe is more matured as doing lots of…
start to see changes in parital frontal and finally temporal lobes by age of …
90%
PFC pre frontal cortex.
looking and grabbing
20
progressive changes=
regressive changes =
=myelination, neuron proliferation, synaptogenesis
=cell death, synaptic pruning, loss in grey matter
synaptic pruning
eliminating unused or weaker synapses in the brain. occurs after synaptogenesis and is part of how the brain becomes more effieicent - occurs especially during adolecence
myelination
coating axons with fatty substance for insulation, speeding up transmittion between neurons.
gray matter
contains most of brains neurons and synapses
neural proliferation
neurons multiply at a very fast rate, mostly during prenatal development, linked to neurogenesis
synaptogenesis
neurons form connections caused synapses, the wiring of the brain
cell death
natural and controlled process where cells die off as part of development - efficient brain function.
as grow up increase in gray matter due to…
synaptogenesis, mylination , neural profileration
as get into adolescence its the refining of these…
this is why you are not perfomring like an adult when your brain is an ‘adult brain’
synaptic pruning, cell death and myleination
maturation of the prefrontal cortex:infancy
6-12 months….
12-18 months….
Synaptogenesis in the PFC in the….
…Increases in dendritic trees in layer III of the PFC (Koenderink et al., 1994)
12-18 months: Peak in synaptogenesis in the middle frontal gyrus (Huttenlocher et al., 1997)
Synaptogenesis in the PFC in the first decade of life; reduction in synapses through adolescence and adulthood (Glantz et al., 2007)
cerebral blood volume=
increases in PFC for …
other areas of brain=
connectivity of mylination in frontal and temporal lobes takes up to…
the amount of blood thats being pumped into specific areas of the brain.
8/9 months of age, which isnt very long but other areas happens in first 2-3 months of life.
6-8 months and 4-6 in other areas.
middle childhood and adolecence= can do fmri
changes in brain:
gray matter during puperty…
then it …
total gray matter does stay fairly…
white matter increases during … because
peaks
declines.
constant
adolecence… myelination
realtionship betwee brain and behaviour (developmental trajectories)
2 questions:
1) what are developmental changes in PFC…
2) what role do regions beyond the dorsolateral PFC play in subserving cognitive functions?
… look at activation patterns in imaging studies
- OFC= decision-making and the assessment of rewards and punishments
- parietal cortex is important for spatial awareness, attention, and sensory integration.
how do you study brain function in infancy and why is it so dificult?
can do…but..
there is… which is good because…
you cant put a child in MRI because you have to stay still and children dont
consent
bad for developing brain
EEG but is temporary not spatially
FNIRS- which used to look at oxygendated blood flow in child brain, same bold responce but all you have to do is put a cap on a child.
6-8 minths old children showing …
matches with study about ….
the months mapp onto eachother.
across dif tasks, watching activation between …., increase oxygenation see patterns for all these dif tasks.
inhibitory control
myelination
dorsilateral PFC and the parietal lobes
Ezekiel et al., (2013):
functional connectivity of the PFC
): fMRI
at 3
at 4yo
At 3yo: Weak neural interactions within the frontal cortex and unrefined frontoparietal connectivity
At 4.5yo: Stronger neural connections and a refined pathways with efficient connectivity