In their research on birth order, Wagner and Schubert showed that:
a. eldest sons were overrepresented among business executives
b. young sons were overrepresented among teachers
c. oldest sons were overrepresented among U.S. Presidents
d. only children were overrepresented among university presidents
Question 2
In testing a large sample of young men from the Netherlands, Belmont and Marolla found that:
a. later-borns had superior intellectual achievement in comparison to first-borns
b. first-borns had higher intellectual achievement test scores than later-borns
c. only-borns outstripped first-borns in intellectual competence
d. later-borns had higher achievement scores than only children
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