Notifications
Clear all
Hello and welcome to Psychology Roots Forums! We are thrilled to have joined us in this space dedicated to all things related to psychology. Participating in forums can be a great way to learn from others, share your own experiences and knowledge, and connect with like-minded individuals. You can engage in discussions on topics ranging from the latest research in psychology to practical tips for improving mental health.
We also invite you to take advantage of the resources available on our website, including articles, videos, and recommended readings. With so much information at your fingertips, Psychology Roots Forums is the perfect place to begin or deepen your exploration of psychology.
MCQs
1
Posts
1
Users
0
Likes
58
Views
Topic starter
Which of the following would provide the strongest evidence for the idea that intelligence is highly heritable?
(A) The IQ scores of parents are positively correlated with the scores of their children.
(B) Monozygotic twins separated at birth have extremely similar IQ scores.
(C) Dizygotic twins score more similarly on IQ tests than do other siblings.
(D) Adopted children’s IQ scores are positively correlated with their adopted parents’ scores.
(E) Different ethnic groups have different average IQ scores.
Spoiler
Answer
(B) Monozygotic twins separated at birth have extremely similar IQ scores.
Spoiler
Explanation
The strongest evidence presented for intelligence to be highly heritable is that monozygotic twins separated at birth have extremely similar IQ scores. Monozygotic twins share 100 percent of their genetic material. If they are separated at birth and therefore raised in different environments, similarity in their IQ scores argues for the influence of nature or heritability. Parents’ IQ scores do tend to correlate positively with those of their children, but this similarity could be explained by either genetic or environmental factors. Dizygotic twins and other siblings share the same amount of genetic material on average (50 percent). Therefore, if the former score more similarly on IQ tests, an environmental influence is suggested. For instance, dizygotic twins may be treated more similarly than other siblings and grow up during the same time period. Since adopted children do not share any genetic material with the parents who adopted them, similarities must be due to environmental factors. Differences in average IQ scores between ethnic groups could be explained by either genetic or environmental factors.
Posted : 10/03/2024 5:49 pm