Module 9.3 - Biological, Environmental, and Behavioural Influences on Intelligence Flashcards
heritability estimate
describes how much of the differences between people in a sample can be accounted for by differences in their genes
if everyone has the same environment are estimates high or low?
high, e.g., intelligence in wealthy people = 0.72
for heterogeneous groups are estimates high or low?
low because other factors could influence performance, e.g., intelligence in some poorer groups = 0.10
a study of the humane genome of 7000 people found a mere ___ markers that predicted cognitive ability. these markers only explained 1% of the variability
6
what are the 2 ways of manipulating genes?
1) gene knockout studies
2) transgenic animal studies
gene knockout studies
involve removing a specific gene and testing the effect of removing the gene by comparing animals without the gene to those that have it
transgenic animal studies
inserting genetic material into mouse chromosomes to study the changes associated with the new gene
doogie mice have an altered version of what gene?
NR2B gene, which is related to learning and memory
the average human brain weighs between _______ and ______ grams
1300 and 1400 grams
how much did einsteins brain weigh?
1230 grams
true or false: humans have more cortical folds than other species
true
true or false: neuroimaging studies noted that the higher the score on the WAIS, the less convolutions seen across several regions of the cortex
neuroimaging studies noted that the higher the score on the WAIS, the more convolutions seen across several regions of the cortex
true or false: most researchers agree that both heredity and environment do play a role
true
true or false: enriched environments with a lot of cognitive stimulation improve intelligence
true
what are the average IQ ratings of birth orders?
the IQs of first born children are on averge about 3 points higher than those of second born children and 4 pointd higher than those of third born childrn
