neurobiology of intelligence

Common IQ tests and neurodivergence

Some adjustments can be done like colourblind version, visual/auditory versions, skip some in WAIS.

If no adjustments they will be at a disadvantage

Wilson

Meta analysis, 1800 ppts, children and adults

Autism: verbal/nonverbal reasoning in typical range, processing speed 1 SD below mean, wm slightly reduced

ADHD: mostly at age expected levels, wm slightly reduced

Brain size IQ

Overestimate of brain volume and IQ

Many recent studies found no correlation between IQ and number of brain cells and weak correlation between IQ and brain weight.

Even tho males have bigger brain, does not mean better IQ

Haier

After learning complex visuo-spatial task, decreased cerebral metabolism after practice

Haier and Benbow

White matter = male no correlation, female positive IQ

Grey matter = male positive with fronto-parietal, female positive but not in fronto-parietal

Finn et al

Connectivity patterns in frontoparietal network predicted levels of fluid intelligence

Connectotyping

Distinct pattern of brain activity that characterises the way each persons mind works and implies that mental processes do not necessarily enlist identical neural pathways.

Stable over time, familial, heritable