intelligence

spearman’s g

the ‘g factor’ underlies specific cognitive abilities that influence intelligence

g vs s

g = general abilities, shared across all tasks

s = special abilities, skills unique to a task

performance = g + s

thurstone’s primary mental abilities (PMA)

intelligence is a set of PMAs, produces intelligence profiles rather than single iq scores

language PMAs

verbal comprehension, word fluency

logical PMAs

numerical ability, reasoning

visual PMAs

spatial visualisation, perceptual speed

memory PMA

associative memory

Gardener’s Theory of Multiple Intelligences

all intelligences are completely independent, no underlying coefficient