individual 9 Flashcards
(20 cards)
What is the correlation between parent and child IQ according to Bouchard and McGue (1981)?
0.4
What is the correlation between siblings’ IQ?
0.7
What are the three factors that influence IQ according to the genetic component analysis?
- Genetic transmission
- Nurture
- Shared environment
What was the weighted average correlation for monozygotic twins raised together?
0.86
What was the weighted average correlation for dizygotic twins raised together?
0.6
What is the correlation for siblings IQ according to the studies mentioned?
~0.47
What is the correlation between parent-child IQ?
~0.42
What did Haworth et al. (2010) estimate regarding the heritability of IQ variance?
~54% of IQ variance is genetic
According to Turkheimer et al. (2003), how does socioeconomic status (SES) affect IQ heritability?
Genes play a larger role in high-income families, while shared environment dominates in lower-income families
What did Herrnstein & Murray (1994) argue about racial IQ differences?
They argued that racial IQ differences were genetic
What do heritability estimates describe?
Variance within a sample
What are Genome-Wide Association Studies (GWAS) related to intelligence?
Intelligence is polygenic, involving many small genetic variations
How many independent SNPs linked to IQ did Davies et al. (2018) identify?
434
What percentage of IQ variation is explained by known genetic markers?
~25%
What are some positive correlations found with IQ?
- Brain volume
- Hand grip strength
- Lung function
- Longevity
- Autism
What are some negative correlations found with IQ?
- Hypertension
- BMI
- Smoking
- Schizophrenia
- Alzheimer’s disease
Fill in the blank: Intelligence has a _______ basis, but the environment remains crucial.
genetic
True or False: IQ heritability increases with age.
True
What is ongoing in the search for specific contributors to intelligence?
The search for specific genetic contributors is ongoing
What broader outcomes is intelligence linked to?
Health outcomes
