It was concluded, among many other things, that
identical twins are about 85 percent similar for IQ
, whereas fraternal twins are about 60 percent similar. This would seem to indicate that half of the variation in intelligence is due to genes.
Which of the following pairs of siblings should have the most similar IQ scores?
Siblings reared together have more similar IQ scores than siblings reared apart. Which pair of family members is likely to have the most similar IQ scores?
Identical twins
. heritability.
Which pair of twins will have more similar IQ scores?
Monozygotic twins raised apart
are more similar in IQ (74%) than dizygotic (fraternal) twins raised together (60%) and much more than parent-children pairs (42%); half-siblings (31%); adoptive siblings (29%-34%); virtual twins, or similarly aged but unrelated children raised together (28%); adoptive parent-child pairs …
Which two individuals are the most likely to have similar IQ scores?
- Twin studies suggest that identical twins' IQs are more similar than those of fraternal twins.
- Siblings reared together in the same home have IQs that are more similar than those of adopted children raised together in the same environment.
Why are IQ scores for fraternal twins more alike than those of ordinary siblings?
The intelligence scores of fraternal twins are more similar than those of ordinary siblings. … Studies of adopted children and their biological and adoptive families demonstrate that with age, genetic influences on intelligence: A)
become more apparent
.
Do twins have lower IQ?
On average,
twins have lower IQ scores at 7 and 9 years old
than singleton children in the same family. In a cohort study, Ronalds and colleagues (p 1306) used data on 9832 singletons and 236 twins born in Aberdeen between 1950 and 1956.
Are twins lucky?
In ancient times, the Yoruba viewed twins with suspicion, and sometimes sacrificed them. But
now twins are considered lucky
. In contrast to the Western view, the firstborn twin is considered the younger of the two. The Yoruba believe that the “senior” twin sent the younger one out first to scout the world.
Which is the best example of crystallized intelligence?
‘ Crystallized intelligence is generally long-lasting and commonly improves with experience. Examples of crystallized intelligence would be things such as
knowledge of facts and possessing a foundation of knowledge on a specific topic
.
Are twins smarter than single babies?
In both surveys, twins scored about 5 IQ points (one third of a standard deviation) lower than singletons. … This is supported by a Dutch study of adult twins, which found
no significant difference
in IQ between singletons and twins from the same families.
What is the best example of fluid intelligence?
Fluid intelligence involves being able to think and reason abstractly and solve problems. This ability is considered independent of learning, experience, and education. Examples of the use of fluid intelligence include
solving puzzles and coming up with problem-solving strategies
.
Is IQ genetic or learned?
Researchers have previously shown that a person's IQ
is highly influenced by genetic factors
, and have even identified certain genes that play a role. They've also shown that performance in school has genetic factors.
Is IQ genetic?
Many studies rely on a measure of intelligence called the
intelligence quotient
(IQ). Researchers have conducted many studies to look for genes that influence intelligence. … These studies suggest that genetic factors underlie about 50 percent of the difference in intelligence among individuals.
What are the most important factors that affect intelligence?
Even though the genetic susceptibility plays a crucial role on the IQ of the individual, various modifiable environmental factors like
education, premature birth, nutrition, pollution, drug and alcohol abuse, mental illnesses
, and diseases can have an influence on an individual's IQ.
Do twins have the same fingerprints?
Even identical twins – who have the same DNA sequence and tend to share a very similar appearance –
have slightly different fingerprints
. That's because fingerprints are influenced by both genetic and environmental factors during development in the womb. … But fingerprints are not unique to humans.
How is IQ inherited?
IQ goes
from being weakly correlated with genetics for children
, to being strongly correlated with genetics for late teens and adults. The heritability of IQ increases with age and reaches an asymptote at 18–20 years of age and continues at that level well into adulthood.
Do siblings have the same IQ?
Sibling rivalry can be a scourge for many families. But now new research has poured fuel on the fire by revealing that older siblings have higher IQs. However, whilst first-borns are technically smarter – they aren't ahead by much. The study found that whilst older siblings have higher IQs,
it is only by one IQ point
.
