Samantha and her identical twin were separated at birth. ...

[big1devin]

Samantha and her identical twin were separated at birth. Scientists have said that confounding variables mean that they cannot be sure which of the girls' traits are similar because of their genes and which are similar due to environment. Why?
 
  What will be an ideal response?

Question 2

Describe the restriction of range problem in twin studies.
 
  What will be an ideal response?

[momtoalll]

Answer to Question 1

Answer: Twin studies cannot rule out confounding variables such as the fact that identical twins look alike. People may treat the twins a certain way based on their identical appearance, which is an environmental influence and not a genetic one.

Answer to Question 2

Answer: The restriction of range problem in twin studies refers to the fact that the family environments for the twins being evaluated probably did not vary very much. Most twins in the twin studies grew up in stable, middle-class homes with married parents. Twin studies also leave out the potential influences of culture because they are usually done within one nation and are always done within one generation because twins are born simultaneously.

[big1devin]

TYSM

[vickyvicksss]

Thanks for the timely response, appreciate it