w8 Intelligence Flashcards
meta-cognition
ability to:
reflect on
and evaluate
our own thought processes
intelligence contains
intellectual self-awareness
ability to improve independently through self-evaluation
IQ is
mean is, SD is
relative means
a standardised statistical score
- your performance relative to others
mean of 100, SD = 15
relative = how individual’s performance compare to that of others
self-rating accuracy of intelligence
65% believe they are better than average
55 think below average
correlation between self-assessed and objectively measured is .30
Z scores
+ calculation
mean of 0
SD of 1
Z-score of 1 is 1 SD above the mean
if IQ score is on average (100), then z-score is 0
z-score of -0.91 x 15) -100 = 86.35
test scores are compared with:
others in the same age group
there are 13 age bands
intelligence across age
matrix reasoning
20 yr old doing 19 questions
same IQ as
80 year old doing 9.5 questions
absolute levels of intelligence differ
peaks of
verbal comprehension
processing speed
perceptual reasoning
vc = increases at middle age then decline
ps= peak 16.5 age
pr = mid 20s
all decline with age
intelligence is decreasing
whole brain volume from 18-35 = 85%
from 75+ = 75%
age-related atrophy
intelligence a predictor of:
academic performance
- cognitive abilities for learning
job performance
genius vs giftedness
- Describe individuals with exceptional talents or achievement
- exceptional intellectual, creative+ arts, high performance in standardised assessments
intelligence - income, longevity
higher earnings - higher intelligence
lower risk of accident by 7% - with each 1 point increase in intelligence
how many people are gifted in aus?
2% of population is moderately
25 australians have profound level
idiot savant is
developmental disabilities but exceptional skills
now outdated + offensive
twice-exceptional + its rarity
intellectually gifted + learning disability
- is rare because of ‘positive manifold’
in 1 million person simulation == 1 person had it = rare
positive manifold?
consistent findings –> cognitive abilities positively correlated across individuals
- one good cognitive test = good in other tests
higher order structure of intelligence
2 structures
verbal intelligence
performance
verbal intelligence subtests
digit span
information
vocabulary
arithmetic, similarities
- high correlation of info + vocab .81
performance intelligence subtests
picture
block design
digit symbol
- correlation 0.63 block and object assembly
cross categories
0.56 of arithmetic and block design
structure of intelligence
general intelligence at the top
P + V
cognitive abilities below
Cattell-horn-Carroll model
3 stratum theory
Stratum III = general intelligence - overall cognitive ability
Stratum II = broad abilities like fluid + crystallised intelligence, memory, processing speed
Stratum I = narrow abilities eg verbal fluency
brain volume and intelligence
correlation
r=.4
more cortical surface area - brain has gyro + sulky
myopia
heritable 85%
intelligence heritablility 47%
positive correlation r=.57