As Primal Body, Primal Mind author Nora Gedgaudas discussed at my Become Superhuman event, those with cholesterol under 200 do more
poorly on cognitive tests than those over 240, and this perhaps why vegetarians and vegans have been shown in studies to have the smallest brains — even less than those eating the SAD (Standard American Diet).
Not exact matches
While
cognitive and motivational deficits were previously thought to be distinct domains of the illness, a better understanding of how the lack of motivation influences
cognitive performance might mean it is the lack of motivation, not cognition
on its own, that is causing people to perform
poorly on tests.
I also went beyond Dr. Small's advice and took 2.4 micrograms of vitamin B12, the standard recommended daily amount — since studies show people with low levels perform
poorly on memory
tests — and 1,000 international units of vitamin D, discovered by Tufts University researchers to boost
cognitive function.
Instead, let's say his teacher uses the
test results (the student in our example was not the only one who did
poorly) as the foundation of a lesson
on metacognitive and
cognitive strategies to improve study habits.
Victims of a closed head injury who have focal memory damage do
poorly on this
test as well as those with further
cognitive damage, so potentially scoring badly
on this
test could actually indicate brain injury rather than malingering.
For example, in one study, neglected children had a smaller corpus callosum relative to control and comparison groups.8 Compared to their non-maltreated peers, children in another study who experienced emotional neglect early in life performed significantly worse
on achievement
testing during the first six years of schooling.9 Furthermore, although both abused and neglected children performed
poorly academically, neglected children experienced greater academic deficits relative to abused children.10 These
cognitive deficiencies also appear to be long lasting.