Do Now: Score how smart are you 1

 How is intelligence tested?  Psychometric testing 2

 Developed test for predicting success in school  Focus on mental age of child (intelligence increases with age)  Standardized tests 3

 With Binet created Stanford-Binet IQ test  IQ = (mental age/chronological age)*100  Example: mental age = 15; chronological = 10 then IQ = (15/10)*100 = 150  All adults assigned Mental Age 20, since IQ does not increase with age and usually plateaus in late teens 4

 Modified Stanford-Binet  3 tests  WAIS: Weschler adult intelligence test  WISC: intelligence scale for 6-16 year olds  WPPSI: preschool and primary scale of intelligence  Deviation IQ = 100 is mean IQ 5

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 Verbal and Performance IQs 8

 Aptitude: predict ability  Achievement: measure what you have learned 9

 Standardized  Reliability  Validity  Can a test be valid and not reliable?  No  Can a test be reliable and invalid?  Yes 10

 Heritability measures genetic factors of intelligence (nature)  Twin Studies and sibling studies 1. Identical twins higher correlated IQ 2. Siblings higher correlated IQ then adopted siblings 3. Racial discrepancies … explain 11

 Twin studies: reared together higher correlation than reared apart  Flynn Effect: IQ scores in population increasing but gene pool is consistent…explain  Example: Head Start programs 12