Intelligence and Tests. Or Are you really as smart as you think you are? And how you can find out. Historical Perspective. Phrenology Craniometry The Dilemma: Mustard Seed or Ball Bearings. Historical Perspective. Alfred Binet Tried to identify mentally retarded children.
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Are you really as smart as you think you are? And how you can find out
The Dilemma:Mustard Seed or Ball Bearings
Tried to identify mentally retarded children.
Came up with the first IQ test
Mental Age Chronological Age
A 4 year old who can answer questions that a typical 6 year old could answer would have an IQ of 150
Distinguishing Ignorance from Stupidity?
Mean = 100 Standard Deviation = 15
130+ = Gifted
145+ = Genius
70- = Moron
55- = Imbecile
25- = Idiot
Componential Intelligence – skills involving metacognition, knowledge acquisition
Experiential Intelligence – Being able to apply knowledge to novel situations
Contextual Intelligence – Common sense
The Savant Problem
Brain Damaged Cases
Gardner’s theory of Multiple Intelligences
Alan Turing and his famous test
Don’t forget Demo
What evidence would be necessary to persuade you that an animal was intelligent?
Continuum vs. Discrete Measures of Intelligence
Face Validity – The extent to which a test appears to test-takers to be valid
Content Validity – How well a test provides a representation of the content domain
Criterion Validity – How well the test predicts
Construct Validity – Does the content domain measure what its supposed to
Multiple Choice – Easy to administer, hard to find good distracter items.
Likert Scale – Item in which you rate on a scale your level of agreement: even vs. odd
Q-sorts – checklist of adjectives: susceptible to context effects
Free response – Need a coding Scheme
Double Barreled Questions:
“I didn’t vote for Gore because I didn’t like his stance on affirmative action”
Redundant Items Lower Content Validity by Over-sampling parts of the content domain.
Mix positive and negative questions to overcome positive response bias.
Ambiguous Items lower validity:
To what extent to you agree with the following:
“An eye for an eye, a tooth for a tooth”
Turn the other cheek vs. I’ll hurt them twice as much as they hurt me…
Ambiguous Items lower validity:
“I’m constantly searching my room for bugs”
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Restricted Range Problems
Simpson’s Paradox Revisited
Feedback and the Barnum Effect
Do Demo Now
Take and evaluate online tests
2-3 pages, doubles spaced, normal font and margins
You can discuss this with your classmates, but the final analysis must be your own