Task 2 Flashcards
Mental Ability
What tasks does the Multidimensional Aptitude Battery have?
- Vocabulary
- Arithmetic
- Spatial
- Picture arrangement
Who was the first researcher to develop a proper mental ability test?
Alfred Binet ; test to determine a childs’ mental age
What refinement did Stern make to Binets IQ test?
IQ= (mental age/ chronological age)*100
What did Spearman find?
g- factor: existence of a single, major dimension of mental ability
What is the principle of the indifference of the indicator?
The content of the task (indicator) is unimportant in determining whether the task would show a high or low g-loading
What are highly g-loaded tasks?
Mostly involve processes such as “the eduction of relations and correlates”
-> e.g. Raven’s Matrices
What are low g-loaded tasks like?
Need to use simpler mental processes that are more automatic or needing to follow rules
What did Thurstone suspect?
g-factor-> inaccurate
He hypothesized 7 primacy factors: verbal fluency, verbal comprehension, numerical facility, spatial visualization, memory, perceptual speed, reasoning
How did researchers combine Spearman and Thurstone’s findings?
g plus factors within g factor-> classifies the many ability tasks into a few broad factors
How does mental ability change during life history?
people’s levels of g increase rapidly through childhood and continue to increase into late adolescence, and then decrease during old age
What could be also possible effects on differences in intelligence between age groups
cohort effects - difference between between people born in different generations
Is mental ability stable across the life span?
There is a high level of consistency across the life course, at least after late childhood
How high is the effect of brain size on mental ability?
There is an average correlation (0.24)
How high is the effect of the amount of myelin on mental ability?
There is a positive correlation (0.5)
What is the effect of brain glucose metabolism?
The rate brain consumes glucose is lower in individuals with a higher IQ (-.68)
Higher intelligence corelates with reduced levels of glucose metabolism during problem solving