I CAN:
• Explain how intelligence is measured
• Differentiate the Stanford-Binet from the
Wechsler IQ tests
Copyright © Allyn & Bacon 2007
Binet-Simon Test calculated a child’s mental age
and compared it to his or her chronological age
1908: The French government
commissioned Alfred Binet with
developing a method of
identifying intellectually deficient
children for their placement in
special education programs. It
was called the Binet-Simon
Scale.
1916: Stanford psychologist Lewis
Terman released the "Stanford
Revision of the Binet-Simon
Scale", the "Stanford-Binet", for
short.
Used initially in America
to test army recruits
Mental Age:
The average age
normal, average
individuals achieve
a certain score
Chronological Age:
The number of years
a person has lived
Copyright © Allyn & Bacon 2007
Intelligence Quotient
A numerical score on an intelligence test,
original computed by dividing a
person’s mental age by chronological
age and multiplying by 100
ME div CE X 100
The original IQ calculation was abandoned in favor of
standard scores based on the normal distribution
This calculation was faulty b/c it indicates that a
person gets dumber as they age.
Copyright © Allyn & Bacon 2007
Most widely used intelligence test
Copyright © Allyn & Bacon 2007
Wechsler Test: (WAIS, WISC, or WPPSI)
The scale on which most IQs are measured
Copyright © Allyn & Bacon 2007
Genetic Influences
The most
genetically
similar
people have
the most
similar
scores
Copyright © Allyn & Bacon 2007
The Eugenics of “Idiocracy”
Copyright © Allyn & Bacon 2007
CAN I?
• Explain how intelligence is measured
• Differentiate the Stanford-Binet from the
Wechsler IQ tests
Copyright © Allyn & Bacon 2007