GROWTH DEVELOPMENT CHILD
MEASUREMENT OF INTELLIGENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
intelligence is strongly genetic
|
|
|
intelligence has a strong environmental component
|
|
|
nurture plays an important role in intelligence
|
|
|
adoptive parents have a positive effect on intelligence.
|
Detailed explanation-1: -The mean correlation of IQ scores between monozygotic twins was 0.86, between siblings 0.47, between half-siblings 0.31, and between cousins 0.15.
Detailed explanation-2: -In this investigation, researchers found that identical twins raised together and identical twins raised apart exhibit a higher correlation between their IQ scores than siblings or fraternal twins raised together (Bouchard, Lykken, McGue, Segal, & Tellegen, 1990).
Detailed explanation-3: -Even when identical twins are adopted by two different families, their scores are very similar. Scans of identical twins’ brains reveal that gray-and white-matter volume is similar, and areas associated with verbal and spatial intelligence are virtually the same (Deary et al., 2009; Thompson et al., 2001).
Detailed explanation-4: -These studies showed that IQ is very heritable (although the environment still plays a role in determining your IQ). We can tell this because the IQ of identical twins are almost always the same and non-identical twins are only sometimes the same.