3. Is it the ability to use reason and logic?
Is it the ability to write and speak clearly?
Is it limited to one’s performance in school?
Is it behavior in social situations?
How about knowing when you’re wrong?
Not that simple, right?
There are many psychological theories about
intelligence that we will examine in this
module
4. How do we know intelligence
even exists?
Psychometricians specialize in measuring
psychological characteristics for intelligence and
personality. By using patterns of test scores, they
have found evidence for general intelligence as well
as for specific abilities
5. What is Intelligence?
Intelligence is an inferred process that
humans use to explain the different degrees
of adaptive success in people’s behavior
‐ The mental abilities that enable one to adapt to,
shape, or select one’s environment
‐ The ability to judge, comprehend, and reason
‐ The ability to understand and deal with people,
objects, and symbols
‐ The ability to act purposefully, think rationally, and
deal effectively with the environment
6. Spearman’s Psychometric Approach ‐
Intelligence as a Single Trait
Psychometric Approach
‐ The measurement (metric) of individual
differences in behaviors and abilities
George Spearman reported findings supporting the
idea that performance on any test of mental ability
was based on a single general ability factor that he
termed “g”
Spearman also believed that performance on any test
of mental ability required the use of a specific ability
factor that he termed “s”
8. Conflicting theories have led many
psychometric theorists to propose
hierarchical theories of intelligence
that include both general and
specific components
9. Cattell’s View of Intelligence ‐
Intelligence as a Few Basic Abilities
Fluid Intelligence
‐ The ability to think on the spot and solve novel
problems
‐ The ability to perceive relationships
‐ The ability to gain new types of knowledge
Crystallized Intelligence
‐ Factual knowledge about the world
‐ The skills already learned and practiced
‐ Examples
‐ Arithmetic facts
‐ Knowledge of the meaning of words
‐ State capitals
10. Intelligence Tests and
Basic Abilities
Fluid intelligence on tests is measured by:
‐ The ability to assemble novel puzzles
‐ The ability to determine the next entry in a series of
numbers
‐ The ability to identify which one of four objects is related
to the others
Children who do well on one test of fluid intelligence
usually do well on other tests of fluid intelligence
‐ They may no necessarily perform well on tests of
crystallized intelligence
13. Carroll’s hierarchal theory is
essentially a compromise between
general and distinct abilities view of
intelligence
Some critics still find it unsatisfactory
because it ignored the research and theory on
cognitive development
14. Broader Theory of Intelligence
Howard Gardener proposed a theory of
multiple intelligences, in which he identified 9
distinct types of intelligence.
The first three intelligences are included in
psychometric theories of intelligence:
‐ Linguistic intelligence
‐ Logical‐Mathematical Intelligence
‐ Spatial Intelligence
15. What Do These Intelligences Examine?
Linguistics ‐ sensitivity to the meanings and sounds
of words, mastery of syntax, appreciation of the
ways language can be used
Logical‐Mathematical ‐ Understanding of objects
and symbols and of actions that be performed on
them and of the relations between these actions,
ability to identify problems and seek explanations
Spatial ‐ capacity to perceive the visual world
accurately, to perform transformations upon
perceptions and to re‐create aspects of visual
experience in the absence of physical stimuli
16. Gardener’s Theory of Multiple
Intelligence
Gardener’s remaining 6 distinct intelligences
are unique to Gardner’s theory:
‐ Musical
‐ Bodily‐kinesthetic
‐ Interpersonal
‐ Intrapersonal
‐ Naturalistic
‐ Existential intelligence
17. What are these Intelligences?
Musical ‐ Sensitivity to individual tones and phrases of music, an
understanding of ways to combine tones and phrases into larger musical
rhythms and structures, awareness of emotional aspects of music
Bodily‐Kinesthetic ‐ Use of one’s body in highly skilled ways for expressive
or goal‐directed purposes, capacity to handle objects skillfully
Interpersonal ‐ Ability to notice and make distinctions among the moods,
temperaments, motivations, and intentions of other people and potentially
to act on this knowledge
Intrapersonal ‐ access to one’s own feelings, ability to draw on one’s
emotions to guide and understand one’s behavior, recognition of personal
strengths and weaknesses
Naturalistic ‐‐ sensitivity and understanding of plants, animals, and other
aspects of nature
Existential ‐ sensitivity to issues related to the meaning of life, death, and
other aspects of the human condition
18. The question arises… should we use the
word intelligence to describe all valuable
skills like doing calculus, speaking 6
different languages, being able to make the
throw from home to second?
If we do… then Gardner is correct… people do
have many unrelated kinds of intelligence. Now
we have changed the definition and meaning of
intelligence
19. Gardener’s theory has prompted
researchers to begin examining
other nontraditional aspects of
intelligence
The best known is emotional intelligence
21. The first Intelligence test was
created by Binet and Simon using
simple tasks to distinguish children
who would do well in school from
those who wouldn’t
Binet and Simon used Mental age to
distinguish “bright” from “dull”
children
22. What is IQ?
Lewis Terman revised Simon and Binet’s test
and published a version known as the
Stanford-Binet Test in 1916.
Performance was described as an intelligence
quotient (IQ) which was imply the ratio of
mental age to chronological age multiplied by
100:
‐ IQ=MA/CA x 100
23. Stanford‐Binet IQ Test
This test measures things that are necessary for school
success
‐ Understanding and using language, memory, the ability
to follow instructions, and computational skills
Binet’s test is a set of age‐graded items
‐ Binet assumed that children’s abilities increase with age
‐ These items measure the person’s “mental level” or
“mental age”
Adaptive Testing
‐ Determine the age level of the most advanced items that a
child could consistently answer correctly
‐ Children whose mental age equal their actual or
chronological age were considered to be of “regular”
intelligence
24. Sample Stanford‐Binet Test Items
4
Name objects from memory; complete analogies (fire is hot; ice is ______); identify
objects of similar shape; Answer simple questions (Why do we have schools?)
6
Define simple words; Explain differences (between a fish and a horse); identify
missing parts of a picture; count out objects
8
Answer questions about a simple story; explain similarities and differences among
objects; tell how to handle certain situations (finding a stray puppy)
10
Define more difficult words; Give explanations (about why people should be quiet in
a library); List as many words as possible; repeat 6‐digit numbers
12
Identify more difficult verbal and picture absurdities; repeat 5‐digit numbers in
reverse order; define abstract words (sorrow); fill in a missing word in a sentence
Adult
Supply several missing words for incomplete sentences; Repeat 6‐digit numbers in
reverse order; Create a sentence using several unrelated words; Describe similarities
between concepts
25. Measuring Intelligence
At any age, children who are average will
have an IQ of 100 because their mental age
equals their chronological age.
‐ Roughly two‐thirds of children will have an IQ
score between 85 and 115
‐ Approximately 95% will have scores between 70
and 130
26.
27. Intelligence Quotient (IQ)
This summary is used to indicate a child’s
intelligence relative to others of the same age
IQ tests measure an individual’s probable
performance in school and similar settings
An IQ test measures performance… but an IQ
test does not explain performance
28. A Five‐Minute IQ Test
1. Water lilies double in area every 24 hours. At the beginning of the
summer, there is one water lily on a lake. It takes 60 days for the
lake to become covered with water lilies. On what day is the lake
half‐covered?
2. A farmer has 17 sheep. All but 9 break through a hole in the fence
and wander away. How many are left?
3. If you have black socks and brown socks in your drawer, mixed in a
ratio of 4 to 5. How many socks will you have to take out in order
to have a pair of the same color?
4. With a 7‐minute hourglass, and an 11‐minute hourglass, how can
you time the boiling of an egg for 15‐minutes?
5. Washington is to one as Lincoln is to:
Five ‐‐or‐‐ Ten ‐‐or‐‐ Fifteen ‐‐or‐‐ Fifty
29. How did you do?
1. On day 59. Remember, it doubles every day.
2. Nine sheep. It is just a matter of careful reading.
3. Three socks. The ratio information is irrelevant.
4. Allow both glasses to drain simultaneously. As soon as
the 7‐minute glass empties, flip it over (7 minutes have
expired). Then, flip it over again after the 11‐minute glass
empties (11 minutes have expired). Fifteen minutes will
have passed when the 7‐minute glass empties.
5. The answer is five. The task here is to realize that the
relation is no the sequence of their presidency but which
denomination of bill upon which each face appears.
30. Another test used frequently are the
Wechsler Intelligence Scale
Wechsler Intelligence Scale for Children‐
Third Edition (WISC‐III)
‐ Used with children 6 to 16
Wechsler Adult Intelligence Scale‐Third
Edition (WAIS‐III)
‐ Used with people 17 and older
31. WISC‐III
Provides a profile of someone’s strengths and
weaknesses
Each test is made of 12 parts
‐ Each part begins with the simplest questions and
progresses to increasingly difficult ones
‐ Performance Scale (6 parts)
‐ Spatial and perceptual abilities
‐ Measures fluid intelligence
‐ Verbal Scale (6 parts)
‐ General knowledge of the world and skill in using
language
‐ Measures crystallized intelligence
32. Verbal IQ is based on:
‐ Information
‐ Measures a child's range of factual information
‐ Example: What day of the year is Independence Day?
‐ Similarities
‐ Measures a child's ability to categorize
‐ Example: In what way are wool and cotton alike?
‐ Arithmetic
‐ Measures the ability to solve computational math problems
‐ Example: If I buy 6 cents worth of candy and give the clerk
25 cents, I would get _________ back in change?
‐ Vocabulary
‐ Measures the ability to define words
‐ Example: What does “telephone” mean?
‐ Comprehension
‐ Measures the ability to answer common sense questions
‐ Example: Why do people buy fire insurance?
‐ Digit Span
‐ Measures short‐term auditory memory
33. Performance IQ is based on:
‐ Coding
‐ Copying marks from a code; visual rote learning
‐ Picture Completion
‐ Telling what's missing in various pictures
‐ Example: Children are shown a picture, such as a car with no
wheels, and are asked: What part of the picture is missing?
‐ Picture Arrangement
‐ Arranging pictures to tell a story
34. ‐ Block Design
‐ Arranging multi‐colored blocks to match printed design
‐ Example: Using the four blocks, make one just like this
‐ Object Assembly
‐ Putting puzzles together ‐ measures nonverbal fluid reasoning
‐ Example: If these pieces are put together correctly, they will make
something. Go ahead and put them together as quickly as you can.
35. The Stanford‐Binet and the WISC‐
III cannot be used to assess infant
intelligence
The Bayley Scales of Infant Development are
often used for infant assessment
36. Do Intelligence tests work?
To answer this question we must
examine Reliability and Validity
37. How Stable is IQ?
Research suggests that intelligence is relatively
stable from early childhood on
IQ scores tend to be fairly stable
‐ IQ test at 4 and a second at 17 ‐ 13 points up or down
‐ IQ test at 8 and a second at 17 ‐ 9 points up or down
‐ IQ test at 12 and a second at 12 ‐ 7 points up or down
The closer together in time that IQ tests are given…
the more consistent (stable) the scores.
38. Do tests scores really measure
intelligence?
This is a question of validity. Does the test
measure what it claims to measure?
Most test developers argue that their tests are
valid measures of intelligence by showing that
test scores are related to children’s grades in
school
40. Factors Influencing Intelligence
The Child’s Influence
‐ Genetics
‐ Genotype–Environment Interaction
‐ Gender
The Immediate Environment’s Influence
‐ Family Environment
‐ School Environment
The Society’s Influence
‐ Poverty
‐ Race/Ethnicity
41. Gender
Boys and girls tend to be equivalent in most aspects of
intelligence
‐ The average IQ scores of boys and girls is virtually
identical
‐ The extremes (both low and high ends) are over‐
represented by boys
Girls as a group:
‐ Tend to be stronger in verbal fluency, in writing, in
perceptual speed (starting as early as the toddler years)
Boys as a group:
‐ Tend to be stronger in visual‐spatial processing, in
science, and in mathematical problem solving (starting as
early as age 3)
42. Schooling
Attending school makes children smarter
‐ Children from families of low SES and those from
families of high SES make comparable gains in school
achievement during the school year
What about during summer break?
‐ Children from families of low SES have a drop in
achievement scores
‐ Children from families of high SES have achievement
scores that stay constant or rise slightly
43. Poverty
The more years children spend in poverty, the lower
their IQs tend to be
‐ Children from lower‐ and working‐class homes average
10‐15 points below their middle‐class age mates on IQ
tests
In many countries, children from wealthier homes
score better on IQ test than children from poorer
homes
‐ The greater the gap in wealth in a country the greater the
difference in IQ scores
44. Poverty Continued…
Chronic inadequate diet can disrupt brain
development
‐ Chronic or short‐term inadequate diet at any
point in life can impair immediate intellectual
functioning
Reduced access to health service, poor
parenting, and insufficient stimulation and
emotional support can impair intellectual
growth
45. Race and Ethnicity
The average IQ score of Euro‐American
children is 10‐15 points higher than that of
African‐American children
The average IQ score of Latino and
American‐Indian children fall somewhere in
between those of Euro‐American and
African‐American children
The average IQ score of Asian‐American
children tend to be higher than any other
group in the US
46. Race and Ethnicity Continued…
American‐Indian children:
‐ Better on the performance part than the verbal part of an
IQ test
Latino children:
‐ Better on the performance part than the verbal part of an
IQ test
Asian‐American children:
‐ Better on the performance part than the verbal part of an
IQ test
African‐American children:
‐ Better on the verbal part than the performance part of an
IQ test
Overall ‐ differences in IQ scores of children from different
racial and ethnic groups describes children’s performance
ONLY in the environments in which the children live
47. Culture‐Fair Intelligence Tests
Raven’s Progressive Matrices
‐ A “culture‐fair” or culture‐reduced test that would make
minimal use of language and not ask for any specific facts
‐ These matrices progress from easy to difficult items ‐‐
measures abstract reasoning
Even on culture‐fair tests, Euro‐American and
African‐American children still differ
‐ One reason ‐ culture can influence a child’s familiarity
with the entire testing situation
Editor's Notes
Intelligence tests were developed for the practical function of selecting students for admission or placement in schools. Originally these tests were not based on any theory of intelligence. They defined intelligence as the ability to do well in school…. So IQ tests do measure intelligence.
What is a better definition… these do not allow us to define intelligence any better because we still have to define judge, comprehend, think rationally, etc…
Spearman based his concept of “g” on the fact that good performance on a wide variety of cognitive tasks correlates consistently and positively though not perfectly.
According to Spearman (1904) all intelligent abilities have an area of overlap, which he called “g” for general ability. Each ability also depends partly on an “s” factor for specific ability. According to Spearman… the “g” factor is the dominant ability when doing tasks. The “s” factors are the lesser abilities.
Psychologists are not in agreement on what “g” represents.
The correlations between mental tasks are due in part to their sharing of the same underlying processes. But… it is also due to the fact that these processes grow together, dependent on the same factor… health, nutrition, education, etc…
Fluid:
Solving a new calculus problem
Designing a road trip from your home town to a Tulsa Oklahoma
Crystal:
Writing a novel
Calculating sales tax
Fluid intelligence - reaches its peak before age 20 and then remains steady throughout life
Crystallized intelligence - continues to increase as long as people are active and alert
What does this mean?
A 20-year-old may be more successful than a 65-year-old at solving an unfamiliar problem but the 65-year-old will excel on problems in his or her area of specialization
Hierarchical integration:
Top: “g”
Middle: eight moderately general abilities (including fluid, crystallized, and some similar to the seven abilities)
Bottom: Specific processes
General intelligence affects all of the moderately general abilities… both general and moderately general abilities affect specific processes. So, knowing someone’s general intelligence allows you to have a good prediction of general memory skills, including memory span.
This hierarchical approach accounts for all the facets of intelligence -- according to the literature.
The test that Binet and Simon designed was later modified for English speakers (it was originally in French) by Lewis Terman and other Stanford psychologists … it was published as the Stanford-Binet test.
The test was developed to identify children who had serious intellectual difficulties -- such that they would not succeed in the public school system and who should not be placed in the same classes with other students. So… this test measured things that were necessary for school success such as understanding and using language, computational skills, memory, and the ability to follow instructions.
The entire test lasts somewhat more than an hour.
Unlike other IQ tests… there is no imposed time limit for the current Stanford-Binet.
The IQ that is determined at one age will mean the same thing at different ages. The mean IQ at each age is 100.
On day 59. Remember, it doubles every day.
Nine sheep. It is just a matter of careful reading.
Three socks. The ratio information is irrelevant.
Allow both glasses to drain simultaneously. As soon as the 7-minute glass empties, flip it over (7 minutes have expired). Then, flip it over again after the 11-minute glass empties (11 minutes have expired). Fifteen minutes will have passed when the 7-minute glass empties.
The answer is five. The task here is to realize that the relation is no the sequence of their presidency but which denomination of bill upon which each face appears.
The same average IQ is produced -- 100.
Produces the same distribution of scores as the Stanford-Binet.
Scoring for the WISC:
130 and above (98%) very superior-gifted
120-129 (91-97%) superior
110-119 (75-90%) high average
90-109 (25-74%) average
80-89 (9-24%) low average
70-79 (2-8%) borderline
69 and below (1%) mentally impaired
So, a score of 130 at age 7 means that a child’s performance exceeded that of 98% of age peers, a score of 130 at age 10 means the same thing.
Other comprehension examples:
What should you do if you see someone forget his book when he leaves a restaurant?
What is the advantage of keeping money in a bank?
Other information examples:
How many wings does a bird have?
What is steam made of?
Other similarities examples:
In what way are a lion and a tiger alike?
In what way are a saw and a hammer alike?
The closer together in time that IQ tests are given… the more consistent (stable) the scores.
The changes that are seen here are likely due to random variation -- alertness at the time of test, his or her knowledge of the specific items on the test, etc…
Scores tend to increase in children who view academic achievement as important.
Scores tend to increase in children whose parents take an interest in their academic success and whose parents have firm but moderate disciplinary procedures.
Scores tend to decrease in children who view academic achievement as unimportant.
Scores tend to decrease in children whose parents are very stern or very lax and who show little interest in their academic success.
Why is there a difference?
Some believe that it is the result of biological differences.
Some believe that it is the result of societal messages regarding gender-appropriateness of different intellectual pursuits or peer pressure.
During the academic year -- schools provide children of all backgrounds with the same stimulating intellectual environment. Over the summer, children from low-SES families are less likely to have the kinds of experiences that would maintain their academic achievement.
Going to school more days of the year --- better for achievement scores. Attending school increases IQ scores and specific academic skills (such as increased mastery of reading and math).
Mean African-American score: 90
Mean Euro-American score: 105
Group differences in IQ scores refer to statistical averages not to any individual’s score.
In fact… millions of African-American children in the US have higher IQ scores than Euro-American children.
There is far more variability within each racial group than between them. So, these averages tell us nothing about the individual person.
Why? Neurological factors, communication style within the culture, cultural values, and plenty of other factors
These findings do not indicate potential, nor do they tell us what these children would do if they live someplace else. The current group differences in IQ are due to environmental differences -- as discrimination and inequality decrease -- IQ differences decrease