IntelligenceIntelligence

Ways to Measure IntelligenceWays to Measure Intelligence

World’s highest IQ

George W. Bush

IQ: estimated at 91

World’s most powerful job

Marilyn Vos Savant

IQ: 228

Writes magazine advice column

“Ask Marilyn”

Not world’s highest IQ

Does IQ Count?

Estimates for presidents: George W. Bush 120, Bill Clinton 149; Jimmy

Carter 145; John F. Kennedy 151, Ronald Reagan 130, Bush Senior 130,

Richard Nixon 131, Scientist Stephen Hawking 160

Ways to Measure IntelligenceWays to Measure Intelligence

Two Types of

Intelligence Tests

I. Stanford-Binet

Scales

II. Wechsler Scales

I. Stanford-Binet

Scales

II. Wechsler Scales

I. Stanford-Binet ScalesI. Stanford-Binet Scales• Alfred Binet – 1st modern intelligence

test(1905)

• Measures - School Knowledge

• Yielded mental age (MA) - Shows the

intellectual level at which a child is

functioning.

Ways to Measure IntelligenceWays to Measure Intelligence

LITTLE BRIAN IS 6.HE HAS A MA OF 6.

IS HE FUNCTIONING AT A NORMAL INTELLECTUAL

LEVEL?

LITTLE ANTHONY IS 8.HE HAS A MA OF 10.

IS HE FUNCTIONING AT A NORMAL INTELLECTUAL

LEVEL?

LITTLE JOSE IS 10.HE HAS A MA OF 12.

IS HE FUNCTIONING AT A NORMAL INTELLECTUAL LEVEL? WHAT IS HIS I.Q.?

I. Stanford-Binet ScalesI. Stanford-Binet Scales

• Today it gives an IQ – intelligence

quotient - Relation between a

child’s mental age & chronological

age.

Mental age

------------------------ X 100 = IQ

Chronological age

Ways to Measure IntelligenceWays to Measure Intelligence

IQ score is your relative

standing within a population of

your age.

120 I.Q.(1.2 X 100 = 120)

These items are used for

administering the

Stanford/Binet Intelligence

Scales

Ways to Measure IntelligenceWays to Measure IntelligenceI. Stanford-Binet ScalesI. Stanford-Binet Scales

• Contains subtests –

- verbal skills &

- performance skills

• 3 scores- verbal, performance & a combination of the two

• Most used test today.

Ways to Measure IntelligenceWays to Measure Intelligence

II. The Wechsler Scales by David

Wechsler

II. The Wechsler Scales by David

Wechsler

II. The Wechsler ScalesII. The Wechsler Scales

Performance skills test ExamplesPerformance skills test Examples

Picture arrangementPicture arrangement

Ways to Measure IntelligenceWays to Measure Intelligence

Picture CompletionPicture Completion

• Stanford-Binet tests only

measures verbal

• Wechsler test measures

both verbal & nonverbal

• Stanford-Binet tests only

measures verbal

• Wechsler test measures

both verbal & nonverbal

What’s the Difference between the Stanford-Binet test & the Wechsler test?