Concept Introduction: Intelligent quotient (IQ) was derived by German psychologist William Stern. IQ is used as a method to assess intelligence. IQ is the ratio of a person’s mental age to a person’s chronological age and multiplied by 100.
Answer to Problem 1MM
Correct answer: The IQ of a 6-year-old with the measured mental age of 9 would be 150. Therefore, option d. is correct
Explanation of Solution
Reasons for the correct statement:
The formula for IQ is as follows:
The given information:
Mental age = 9 years
Chronological age = 6 years
Option d. is given as “150”
As IQ of a 6-year-old with the measured mental age of 9 would be 150, option d. is correct.
Reasons for the incorrect statements:
Option a. is given as “67”.
IQ of a 6-year-old with the measured mental age of 9 would be 150, not 67. So, option a. is incorrect.
Option b. is given as “133”.
IQ of a 6-year-old with the measured mental age of 9 would be 150, not 133. So, option b. is incorrect.
Option c. is given as “86”.
IQ of a 6-year-old with the measured mental age of 9 would be 150, not 86. So, option c. is incorrect.
Hence, options a., b., and c. are incorrect.
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Chapter 29 Solutions
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