individual differences in cognition chapter Flashcards
what are the two main components of intelligence listed in the WAIS
verbal intelligence and performance
explain verbal intelligence component and how age impacts
-Vocabulary and language comprehension
-Declines only slightly
-With aging, goes up slightly when you are 20, then there is a decline in the later years
-Ability to write, read, and use spoken words
explain performance component and age impact
-Reasoning and problem solving
-Includes mathematical oriented kind of things, working memory is important here
-Declines dramatically With aging
explain study that highlights older adults and their job performance
Perlmutter et al. (1990)
-Older adults often do better than younger adults on relevant job-related behavior.
-Shows that even though there is performance decline, people can still perform their jobs at a very high level
explain the Flynn effect and reasoning why
Flynn (2007)/”Flynn effect” (over the years, average IQ has increased a bit)
-Previous generations did not do as well on tests even when they were young.
-Might be due to differences among generations
-There are some theories about why this is happening, but no one is really sure why: could be the complexity of society, could be easier access to things that make you smarter
when do people perform their best work in their professions and two studies about it
Some believe that people in many professions tend to produce their best work in their mid-thirties (Lehman, 1953).
-However, people often maintain high intellectual performance into their forties and fifties.
Working memory and aging (Salthouse, 1992)
-Study: looked at books that were published by philosophers (philosophers tend to write multiple books) and looked at the years the books were published, paid interest which book was the best one, which book became the most famous; found that for most of them the best books were in the person’s 20s and 30s; however people will still able to produce high quality work as they got older
-Study: solved logical problems, requires good working memory to solve these problems; older people with decaying working memory had the hardest things with these problems
-As the questions get more complex everyone gets worse, but the decrease is much bigger for people who are older than people who are younger
what are psychometric tests
-Tests of different aspects of an individual’s intellectual performance
-There is not a single dimension of intelligence.
explain the history of intelligence testing
-Commission in Paris charged with identifying children in need of remedial attention (1904)
-Alfred Binet developed early IQ test.
-Lewis Terman adapted Binet’s test for American students (1916).
-Stanford-Binet test
-Wechsler for children (wisc) or adults (wais)
what is IQ
Intelligent Quotient (IQ)
-A measure of general intellectual performance, which is normed to have a mean of 100 and a standard deviation of 15. (where you stand relevant to everyone else)
-IQ scores are normally distributed through the population.
-Measure someone’s measured age / chronological age, not entire formula, but the main idea
what are some controversies about IQ
-The concept of intelligence is culturally relative.
-Some cultures do not even have a definition of intelligence, having a test for it can become controversial, can we develop an intelligence test that is not from the perspective of a particular culture?
Do IQ tests measure innate endowment or acquired ability?
-Seems as though it is a combination of both
-Standardized intelligence tests measure general factors that predict success in school.
-Breast feeding seems to increase IQ
-Brain size correlates with IQ
-Stress seems to be bad for IQ
IQ and SES?
Interaction between SES and heredity of IQ (when we are trying to predict IQ from parents), a lot of this is not well understood
-IQ seems much more hereditable for those with high SES
-For those with low SES, environment seems more important
IQ and sex?
Not much of a sex difference
-Advantage for women in verbal abilities
-Advantage for males in visuospatial abilities
IQ and racial differences? and paper about them.
Racial differences in cognitive ability
-Not there for memory
-They seem to exist for IQ, but they are lessening with time
Flynn Effect (Marks 2010), wrote a paper about why the racial differences occur in IQ
-More sophisticated society?
-Better nutrition?
-Literacy?
-Believes that this is the main factor in the differences in IQ
-Racial disparities
-African Americans about 1 SD lower then European Americans (same thing when you consider different nationalities)
explain the literacy hypothesis
-Maybe this is due to literacy rates
-Surprising number of people in US do not have high literacy
-If you can’t read, you can’t excel at IQ tests
Tested:
-Correlation between IQ and literacy
-If literacy is really the reasoning behind IQ, as literacy increases (which it does overtime) so does IQ
-Flynn Effect and racial differences should be more evident in verbal subscales of IQ tests
literacy hypothesis and SD and and skewedness
Skewedness and SD of IQ distribution, and Flynn Effect IQ increases should be larger in lower half of IQ distribution
-SD should get smaller over time because those who are low in IQ should be getting less and less, subset with low scores should be going up too and the skewedness should be less negatively skewed as time goes on