Correlation studies are often used to help determine whether certain characteristics are controlled more by genetic influences or by environmental influences. These studies often examine adopted children and compare their behaviors with the behaviors of their birth parents and their adoptive parents. One study examined how much time individuals spend watching TV (Plomin, Corley, DeFries, & Fulker, 1990). The following data are similar to the results obtained in the study. Amount of Time Spent Watching TV Adopted Children Birth Parents Adoptive Parents 2 0 1 3 3 4 6 4 2 1 1 0 3 1 0 0 2 3 5 3 2 2 1 3 5 3 3 a. Compute the correlation between the children and their birth parents. b. Compute the correlation between the children and their adoptive parents. c. Based on the two correlations, does TV watching appear to be inherited from the birth parents or is it learned from the adoptive parents?

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Statistics for The Behavioral Scie...

10th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781305504912
BuyFind

Statistics for The Behavioral Scie...

10th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781305504912

Solutions

Chapter
Section
Chapter 15, Problem 11P
Textbook Problem

Correlation studies are often used to help determine whether certain characteristics are controlled more by genetic influences or by environmental influences. These studies often examine adopted children and compare their behaviors with the behaviors of their birth parents and their adoptive parents. One study examined how much time individuals spend watching TV (Plomin, Corley, DeFries, & Fulker, 1990). The following data are similar to the results obtained in the study.

    Amount of Time Spent Watching TV
    Adopted Children Birth Parents Adoptive Parents
    2 0 1
    3 3 4
    6 4 2
    1 1 0
    3 1 0
    0 2 3
    5 3 2
    2 1 3
    5 3 3

a. Compute the correlation between the children and their birth parents.

b. Compute the correlation between the children and their adoptive parents.

c. Based on the two correlations, does TV watching appear to be inherited from the birth parents or is it learned from the adoptive parents?

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