chapter 9-11 Flashcards
anthropometics (Sir Francis Galton)
intelligence
the ability to think, understand, reason, and adapt to overcome obstacles
mental age
the average intellectual ability score for children of a specific age
what is the average mental age of a 7 year old child? what would be considered being behind?
7 would be average, anything under 7 would be behind
Standford-Binet test (Lewis Terman)
a test intended to measure innate (genetic) intelligence
intelligence quotient
- a measure in which the mental age of an individual is divided by the person’s chronological age and then multiplied by 100
- breaks down with age
what are the pros and the cons of using IQ as a method of intelligence testing?
- pro: reinforced the view that intelligence is genetic, gives you a permanent score
- con: method assumes that intelligence is always increasing
Wechsler adult intelligence scale (WAIS)
the most commonly used intelligence most commonly used in adolescents and adults
- deviation IQ: compares a person’s IQ with the average score of that age group
- separated into general ability index and cognitive proficiency index
what is the general ability index?
includes the verbal comprehension index (similarities, vocabulary, information) and the perceptual reasoning index (block design, matrix reasoning, visual puzzles)
what is the cognitive proficiency index?
includes the working memory index (digit span, arithmetic) and the perceptual speed index (symbol search, coding)
Raven’s progressive matrices
an intelligence test that emphasizes problems that are intended not to be bound to a particular language or culture
what are the pros of Raven’s progressive matrices intelligence test?
- free from culture bias
- scores correlate with WAIS
- other tests had more bias, this was a good alternative
problems with the racial superiority interpretation
- culturally biased test content
- culturally processed test process
- stereotype threat
what is the stereotype threat?
occurs when negative stereotypes about a group cause group members to under-perform on ability tests
- ex: if a black person is reminded that they are often scored more poorly, they are more likely to do worse on the test, giving neutral instructions reduces this risk
- people are not necessarily consciously aware of this
entity theory
the belief that intelligence is a fixed a characteristic and relatively difficult (or impossible ) to change
incremental theory
the belief that intelligence can be shaped by experiences, practice, and effort
people who held the ______ theory were more likely to give up while facing problems which resulted in failure
entity
people who held the ______ theory were more persistent and showed an improvement in intelligence over time
incremental
Spearman’s general intelligence factor ‘g’
thought to represent a person’s “mental energy”, ability to learn, reason, and solve problems
does spearman’s general intelligence factor ‘g’ tell us the whole story?
no, there is the case of savants
what is a savant?
individuals with low mental capacity in most domains but extraordinary abilities in other specific areas such as music, mathematics, or art
True or False?
a person can develop savant abilities after having suffered a brain injury
true
50% of savants often have which mental disability?
autism
spearman’s two factor model
“g”: general , overarching intelligence
“s”: specific-level, skill based intelligence
Thurstone re-examined spearman’s general intelligence tests and found ______________
7 primary mental abilities
what is the hierarchical model of intelligence?
lower level abilities (like “s” and those proposed by Thurman) are nested within general intelligence
Sternberg’s triarchic theory of intelligence
intelligence consists of 3 domains:
- analytical: verbal, mathematical, problem-solving
- practical: ability to address real world problems
- creative: ability to create new ideas to solve problems
Gardener’s multiple intelligences model
- 8 different forms of intelligence exists
- lead to the idea of learning styles: the hypothesis that individuals are fundamentally different in how they best acquire information (ex: visual learners)
- very little scientific support
fluid intelligence
a type of intelligence that is used to adapt to new situations and solve new problems without relying on previous knowledge
crystallized intelligence
a form of intelligence that relies on extensive experience and knowledge and, therefore, tends to be relatively stable and robust
type of intelligence that peaks over adulthood and decreases over time
fluid intelligence
type of intelligence that progresses over time rather than decreasing with age
crystallized intelligence
brain size is a good measure of intellectual ability
True or False?
explain.
false, -ex: women’s brains are often smaller than men’s but there’s no difference in intellectual ability
-the amount of tissue in a person’s cortex is what makes a difference
___% of the variability in intelligence can be amounted to the amount of “folds” in someone’s brain
25
gyri
ridges of the cerebral cortex
number and size of gyri are greater in species with more __________
complex cognitive abilities
what is the proof that there are other ways of generating complex cognitive process other than by the size of the gyri?
avian brains lack convulsions but they are still capable of complex cognition
-relative brain size is the other factor
what are 3 things that allow complex cognitive processes?
- relative brain size
- neuron density
- organization
which animal has the biggest relative brain size?
humans
what do twin and adoption studies show about biological influences on intelligence?
as genetic relatedness increases, so does the similarity of IQ’s
what are 2 environmental influences on intelligence?
- health/nutrition (healthy students attend school more frequently)
- income (high income households have better access to high quality schools, low income households are more likely to have stressors that distract learning)
Flynn effect
the steady population increases in intelligence test score over time
developmental psychology
-the study of change and stability of human physical, cognitive, social, and behavioral characteristics across the lifespan
early development influences later behaviours
True or False?
true
methods for measuring developmental trends
cross-sectional design
used to measure and compare samples of people at different ages at a given point in time
what are the cons of cross-sectional design?
- risk of cohort effects: consequences of being born at a specific moment in time/year/generation.
- a number of different factors can influence physical and mental development and while doing a cross-sectional study, the older people being studied would not have gone through the same things as the younger people which can bias the results in many ways
methods for measuring developmental trends
longitudinal design
follows the development of the same set of individuals through time
what are the cons of longitudinal design?
- long and costly
- risk of attrition: you may lose participants as they drop out or die during the study so the same size diminishes
germinal stage
first stage of prenatal development and spans from conception to 2 weeks beyond fertilization
-cell division
embryonic stage
- weeks 2 through 8
- embryo starts to develop major physical structures such as the heart, lungs, arms, hands, feet, and nervous system
fetal stage
- weeks 8 through birth
- skeletal, organ, and nervous systems become more developed and specialized
- fetus begins to move, develops sleep schedules, and responds to external stimuli
explain the development of the fetal brain by the 4th week of pregnancy
the fetal brain begin to divide between forebrain, midbrain, and hindbrain
explain the development of the fetal brain by the 11th week of pregnancy
the fetal brain differentiates between hemispheres, cerebellum, and brain stem
what happens to the fetal brain during the final month of pregnancy?
myelination of the brain occurs
teratogen
a substance, such as a drug, that is capable of producing physical defects to the fetus
fetal alcohol syndrome
involves abnormalities in mental functioning, growth, and facial development in the offspring of women who consume alcohol during the pregnancy
smoking increases the risks of _______, _______, and _______ during pregnancy
miscarriage, death, premature birth
FAS children are often born __% underweight
30
describe the sensory awareness of a child that is 4 months into the gestation period
the brain starts receiving signals from the eyes and the ears
describe the sensory awareness of a child that is 7-8 months into the gestation period
fetus is actively listening to external stimuli
-this is why babies prefer maternally associated sounds immediately after birth
what is the pacifier method?
- a study that had the mothers read a dr Seuss book 6 weeks prior to their due date
- at birth the babies were given a pacifier that could be used to control a tape recording controlling an audio version of books
- the babies could quickly learn to continue playing auditory stimuli that they wanted to continue playing, they would ‘suck’ more at dr Seuss stories
how does the sound of a baby’s cry prove that the fetus is listening to external stimuli during gestation period?
the baby cries in an accent indicating that it is attending to the language structure of the surrounding environment
explain the vision of a child at birth, 2 months, 4 months, and 6-12 months
Can see 12-15 inches at birth
-immediately prefer to look at face-like stimuli
Colour vision develops at around 2 months
Depth perception develops around 4 months
20/20 by 6-12 months of age
explain a child’s smell and taste at birth
- cringe at foul odors
- innate preference for sweet tastes and aversion to sour and bitter tastes
- discriminate mother’s breast milk
reflexes
Involuntary muscular reactions to specific types of stimulation
-Provide infants with a basic set of responses for feeding and interacting with caregivers
rooting reflex
elicited by stimulation to the corners of the mouth, which causes infants to orient themselves towards the stimulation and make sucking motions. the rooting reflex helps the child begin feeding immediately after birth
moro reflex
also known as the “startle: reflex, occurs when infants lose support of their head. infants grimace and reach their arms outward and then inward as a hugging motion. this may be a protective reflex that allows the infant to hold on to the mother when support is suddenly lost
grasping reflex
elicited by stimulating the infants palm. the infant’s grasp is remarkably strong and facilitates safely holding onto one’s caregiver
unlike reflexes, motor skills depend on ______
practice
explain motor development in a child’s brain in its first year of life
-cerebral cortex thickens, first in sensory and motor areas, then perceptual areas, and even in ‘higher order’ thinking areas
synaptogenesis
the forming of new synaptic connections
synaptic pruning
the loss of weak nerve cell connections
-this is to improve neural efficiency
Jean Piaget
cognitive development
the study of changing abilities and processes of memory, thought, and reasoning that occur throughout the life span
Jean Piaget believed that knowledge is accumulated by which 2 processes? explain both and give examples
1) Assimilation: occurs when new information is added but interpreted based on previous knowledge
- ex: having a certain schema of what a horse is until it’s modified
2) Accommodation: occurs when belief structures are modified based on experience
- ex: calling a zebra a horse until they are differentiated into different species
according to Jean Piaget, cognition develops through 4 stages. What are these stages?
- sensorimotor
- preoperational
- concrete operational
- formal operational
sensorimotor stage (0-2 years)
the period in which childrens’ thinking and understanding about the world is based on sensory experiences and physical actions they perform on objects
(Infants thinking and exploration of the world is based on their immediate interactions (things that are in their current reach) unlike adults that can imagine things or people that are not currently in their environment)
object permanence
the ability to understand that objects still exist even when they cannot be seen or touched
- this is a major milestone of the sensorimotor stage
- infants struggle with A-not-B errors until the end of the stage
preoperational stage (2-7 years)
Characterized by understanding of symbols, pretend play, and mastery of the concept of conservation
- by the end of this stage, children will no longer make scale errors
- struggle with perspective taking
conservation
The knowledge that the quantity or amount of an object is not related to the physical arrangement and appearance of that object
concrete operational stage (7-11 years)
is when children develop skills in using and manipulating numbers, as well as logical thinking
- during this stage, children begin to understand transitivity (ex: if A>B and B>C, then A>C)
- still struggle with more abstract thinking (ex: inability to mentally represent alternate realities