Lecture 2 Flashcards
what does wisc stand for
weschler intelligence scale
what is included in the wisc
10 subtests and 4 indexes
what are the indexes
categories: Verbal comprehension, perceptual reasoning, working memory, processing speed
what are the ages in which differentiate adult vs child
child: 6-16
adult: 16-90
what did binet and simon do
conceived a test to identify children who needed special schooling
who came up with the concept of mental age that was later replaced by quotient
binet and simon
Terman - binet iq test did what with it
standardized the test with > 1000 children aged 4-14
david weschler did what
created a test for both adults and children
what differentiated weshlers test from binet
much more detail and comprehensive, added non-verbal
what does the verbal comprehension index measure
ones ability to comprehend verbal stimuli, reason with semantic material and communicate thoughts and ideas with words
vocabulary and information subtests are related to
crystalized knowledge
what is crystalized knowledge
the depth of a persons acquired knowledge of a culture and the effective application of this knowledge; reasoning
Perceptual reasoning index is composed of which four subtests
bloc design, matrix reasoning, visual puzzles (optional, figure weights and picture completion)
what is matrix reasoning
identifying a pattern and finding the missing component
how would you evaluate someone with a different second language
preferably in their more comfortable language
what is digit span forward
saying numbers and having to repeat them forward, backward, and in chronological order
what is vocabulary
visual support to help, then asking questions like what is a book and have them explain in their own words
arithmetic is what
math problem, only answer once and is timed
visual puzzle is what
giving them two minutes to find symbols, speed processing
information subtest
asking them trivia
figure weights subtest
balance with circles on them, have to make them equal (head math)
what are the core subtests to verbal comprehension
similarities, vocabulary, information
what are the core subtests to perceptual reasoning
block design, matrix reasoning, visual puzzles
what are the core subtests to working memory
digit span, arithmetic, letter number sequencing
what are the core subtests to processing speed
symbol search, coding
what does perceptual reasoning measure
fluid reasoning, perceptual organizational skills and visuoconstruction
what might prevent someone from succeeding in perceptual reasoning
stroke or a neurodisorder
working memory measured what
attention, concentration and working memory, ones ability to hold information
what does processing speed index measure
speed of mental processing, using visual stimuli and graphomotor skills
why is processing speed important to test someone
is important related to the efficient use of other cognitive abilities
ravens matrices
puzzle like test (easy to engage) has better face validity, correlates highly with general IQ
raven is ___ not ____
visual, verbal
for the tables in percentiles - what numbers correlate with what
9 is average, 14 is above average
very superior means
130+ IQ, 2.2 in normal curve
superior means
120-129 IQ, 6.7 normal curve
highe avergae means
110-119 IQ, 16.1 normal curve
average means
90-109 IQ, 50 normal curve
low average means
80-89 IQ, 16.1 normal curve
borderline means
70-79 IQ, 6.7 normal curve
extremely low means
69 and below IQ, 2.2 normal curve
IQ=
your score vs mean from population or average score for someone your age
we need SD to interpret what
the raw scores
why do we mention confidence interval?
accounts for any error, 95% chance it is between those
what is validity
are you testing what you meant to test
what is reliability
can you get the same results every time, with different times and different people
are IQ scores reliable
not 100% but still good- varies iwth mood, effort
does early iq predict young adult iq
usually IQ is stable over time so it is a good predictor
how stable is IQ over lifespan
to show use raw scores and climate overtime is seen to
is IQ stable with age
familiarity effect- could be impacted by repeated concussions
flynn effect
IQ gradually rises with each subsequent age group
what is the average gain of iq per year
3 points per decade
Comparing longitudinal versus cross section studies does not take into account
the cohort effect
hypothetical causes…
to explain the increase in IQ points over time
where do the norms from the test come from
wais 4 was standardized on a sample 2,200 people in the US from 16-90
the median full scale IQ is… with a standard deviation of…
100, 15
what might clinicians say the wais tells us
measures cognitive potential or neurological dysfunction, educational or vocational placement decisions, helps with diagnoses
researchers might say what about the wais
measures general cognitive functioning of the population and helps define participants
wechsler defined intelligence as…
a global entity that is composed of qualitatively different abilities
