Question 1

Alfred Binet believed that, over the lifetime, intelligence:

Accepted Answer

Alfred Binet, a French psychologist, was a pioneer in intelligence testing. He believed that intelligence was not fixed and could be improved through education and proper training. His work led to the development of the first practical intelligence test, which was designed to identify children in need of educational assistance. Binet's perspective emphasized the potential for change in intelligence over time, influenced by experiences and learning opportunities.

Question 2

The heritability coefficient of intelligence:

Accepted Answer

Heritability coefficients apply to populations, not individuals, and indicate the proportion of variation in intelligence within a population that can be attributed to genetic differences.

Question 3

If we assume that wealthy children all have nice homes with books, adequate nutrition, and time for play and exercise, we can also assume that the heritability of intelligence among wealthy children is _____ than among poor children.

Accepted Answer

In wealthy environments where resources are abundant, genetic factors play a larger role in determining intelligence, leading to higher heritability. In contrast, in poorer environments, external factors like lack of resources can have a greater impact, reducing the heritability of intelligence.

Question 4

Which of these domains of intelligence tend to decrease the most with age?

Accepted Answer

Abstract reasoning tends to decrease with age as it relies on fluid intelligence, which typically declines over time.

Question 5

The average person today scores about _____ IQ points higher than the average person did 100 years ago.

Accepted Answer

This phenomenon is called the Flynn effect, and it suggests that improvements in education, nutrition, and technology have led to higher IQ scores over time. The average IQ score is designed to be 100, and tests are periodically renormed to maintain this average. However, the average score has gradually increased over the past century, with some estimates suggesting an increase of 30 points or more.

Question 6

Environmental factors that are experienced by all relevant members of a household are called the:

Accepted Answer

Shared environment refers to environmental factors that are experienced by all relevant members of a household. Nonshared environment refers to environmental factors that are unique to an individual and not shared with others in their household. Heritability coefficient refers to the proportion of variation in a trait that is due to genetics. Collective unconsciousness refers to a theoretical construct in psychology and is not related to environmental factors.

Question 7

Research suggests the reason why first-born children have higher IQs than their siblings is that first-born children:

Accepted Answer

Research has shown that first-born children often have higher IQs than their siblings because they receive exclusive attention from their parents during their early years, and this undivided attention can lead to cognitive advantages.

Question 8

Which of these domains of intelligence tend to decrease the least with age?

Accepted Answer

Verbal reasoning abilities tend to be more stable and may even improve with age, as they are often used in daily communication and reading activities. On the other hand, reasoning under time constraints and abstract reasoning often decline with age. Reasoning about spatial relationships can also decline with age, especially in tasks that require mental rotation of objects.

Question 9

When people have identical genes, the differences in their intelligence are influenced:

Accepted Answer

The answer of When people have identical genes, the differences...

Question 10

Over the lifetime of an individual, absolute intelligence tends to:

Accepted Answer

Studies have shown that intelligence tends to increase from childhood to adolescence and into middle age, peaking around the late 30s to early 40s, and then begins to decline gradually thereafter. Therefore, choice C is the best answer.

Question 11

Many people mistakenly believe that "genetic" is a synonym for:

Accepted Answer

The answer of Many people mistakenly believe that "genetic" is...

Question 12

Height is a highly heritable trait, which means that:

Accepted Answer

Height is considered a highly heritable trait because genes do play a significant role in determining a person's height. However, it is not a precise genetic prediction. Rather, genes establish a range of heights that a person may achieve. Environmental factors such as diet and lifestyle choices can influence where a person falls within that range. Therefore, it is not accurate to say that genes dictate a precise height or that a person's height cannot be influenced by environmental factors. People whose ancestors were 5 feet tall may not necessarily be 5 feet tall themselves, as there is variation in the genes inherited from both parents.

Question 13

Environmental factors that are not experienced by all relevant members of a household are called the:

Accepted Answer

Nonshared environment refers to environmental factors that are specific to individual members of a household and are not experienced by all relevant members. This could include things like unique life experiences, personal relationships, or even individual genetic differences. The other choices (A, B, D) do not accurately describe this concept.

Question 14

Arnold and Ernie are brothers, ages 12 and 10, respectively, who share many common interests. As they increase in age, their intelligence test scores will become:

Accepted Answer

Research shows that genetic effects become more pronounced with increasing age. Therefore, as Arnold and Ernie age, their intelligence test scores will become more similar to one another than their current scores.

Question 15

The heritability of intelligence among older people is _____ than the heritability among young people, perhaps because _____.

Accepted Answer

Heritability of intelligence tends to be higher in older people because they have had more similar life experiences, reducing environmental variability.

Question 16

Thousands of years ago, a highly advanced civilization in a galaxy far away decided to clone its most intelligent and fearless soldier. These self-replicating clones were then sent out to populate the multiverse. Over time, the cloned soldiers eradicated all other intelligent beings in the multiverse. As a result, the heritability coefficient of intelligence in the multiverse is:

Accepted Answer

The cloned soldiers eradicated all other intelligent beings in the multiverse, so there is no genetic variation for intelligence. Therefore, the heritability coefficient of intelligence is 0.

Question 17

Because being raised in the same household is only a rough measure of the similarity of two people's experiences, twin studies on intelligence may _____ on intelligence.

Accepted Answer

Twin studies may underestimate the influence of experiences because they often assume that twins raised together have identical environments, overlooking subtle differences in individual experiences.

Question 18

Which statement is true?

Accepted Answer

The answer of Which statement is true?
...

Question 19

The Flynn effect predicts that:

Accepted Answer

The Flynn effect refers to the observed phenomenon that IQ scores have been increasing over time and across generations in many countries. This implies that people today are likely to have higher intelligence scores than their grandparents. Options A, B, and D are not related to the Flynn effect.

Question 20

As the age difference between siblings increases, the correlation between their intelligence scores:

Accepted Answer

Research suggests that as the age difference between siblings increases, the correlation between their intelligence scores becomes weaker, indicating a decrease in the similarity of their intelligence levels. This may be due to differences in environmental influences, such as educational opportunities and parenting styles, as well as individual differences in genetic makeup and personality.

Quiz 10: Section 2: Intelligence