Chapter 9 Testing Flashcards
(49 cards)
Intelligence tests
measure general mental ability
potential rather than previous learning
Stanford-Binet IT
Wexler Adult Intelligence Scale
aptitude tests
assess specific types of mental abilities (also measures potential more than previous knowledge)
differential aptitude test: verbal reasoning, numerical ability, spelling, language use, abstract reasoning, perceptual speed and accuracy, mechanical reasoning, spatial reasoning etc…
achievement tests
gauge a person’s mastery and knowledge of a various subject (previous learning)
reading, spelling, arithmetic
measures at grade equivalents: I’m reading at 10th grade level
personality tests
measure various aspects of motives, personality, including motives interests values attitudes
tend to call these scales cuz there’s no right or wrong
self report test
(personality test) is a questionnaire that can have a measure of a lot of traits or just one
projective tests
projective tests take an indirect approach and use vague ambiguous stimuli that reveals the subjects needs, feelings and traits
Rorschach test is an example
Thematic apperception is a picture and subjects are asked to describe it – what are the characters feeling
standardization
refers to the uniform procedure used in the administration and scoring of a test
test norms
provide information about where a score on a psychological test ranks in relation to other scores on on the test
compare against other people and gives you the percentile
a percentile score
indicates the percentage of people who score at or below the score one has obtained
based on a standardization group , which is a carefully selected test group of about 6000 others with similar background to the one being tested
reliability refers to
the measurement consistency of a test
one way to do this is to repeat the test a few weeks apart (test retest reliability)
the closer it is to +1 on the correlation coefficient then the more reliable a test is but over +.7 is in the ballpark
validity refers to
the ability of a test to measure what is was designed to measure
3 types of validity
content validity
criterion-related validity
construct validity
content validity refers to
the degree to which the content of a test is representative of the domain it’s supposed to cover
eg a poorly written Psychology exam has bad content validity
criterion-related validity is
estimated by correlating subjects’ scores on a test with their scores on an independent criterion of the trait assessed by the test
eg. a test measures how good a pilot you’ll make and then you become a pilot and measure the correlation between the test and performance in their training, this will show the criterion related validity
construct validity refers to
the extent to which there is evidence that a test measures a particular hypothetical construct
basically how the test is constructed/broken down
is the cake tasty?
is the appearance beautiful?
as opposed to just rate my cake…
Summarize the contributions of Galton
believed intelligence was passed on genetically ( he was darwin’s cousin)
tried to test intelligence based on sensory sensitivity
tests were unsuccessful and not related to what he was testing
he coined nature vs nurture
also came up with concepts of percentile and correlation
set the stage for Binnet
Summarize the contributions of Binnet
commissioned to come up with a standardized test to be able to give kids with special needs attention
standardized test would rectify teacher bias
Along with Theodore Simon in 1905 he came up with the test that was capable of
predicting children’s performance in school pretty well
inexpensive and easy to administer and was able to predict children’s performance pretty accurately so it spread throughout EU and NA
mental age indicate that
he or she displayed the mental ability typical of a child of that chronological (actual) age
revised in 1908 and 1911 when he died
who built on the Binet test?
Terman. Stanford-Binet Intelligence Scale (1916)
calculation for intelligence quotient (IQ)
mental age divided by actual age x 100
purpose of IQ scores
put all kids on the same scale
Wechsler contribution
found the Stanford Binet limited for adults so he came up with an adult IQ test in 1939
Wechsler Adult intelligence scale
then made a version for kids
less dependent on verbal skills than Stanford-Binet
more on non–verbal reasoning
computation of separate scores for verbal IQ, performance (non-verbal) IQ, and full scale (total IQ)
Computation of Wechsler test
he discarded the IQ in favor of a new scoring scheme based on normal distribution and even though the term lingers on the scores are not based on quotient (normal distr. being the mean in the centre of the bell curve)
standard deviation measure of variability serves as the unit of measurement
68% of scores fall within plus or minus 1 standard deviation of the mean (so in IQ score terms that’s 15 points)
95% fall within plus or minus 2 standard deviations of the mean (in IQ terms that is 30 points)
99% within 3 (in IQ that is 45 points)
this scoring mechanism has been adopted by most other IQ tests (including Stanford-Binet)
What kinds of questions are found on intelligence tests?
pg 404