Intelligence and Testing Unit 11 History of Intelligence

Intelligence and Testing Unit 11

History of Intelligence Testing Sir Francis Galton Alfred Binet Lewis Terman David Wechsler

Sir Francis Galton Pioneer psychometrics Believed intelligence was hereditary Cousin to Darwin Wrote Hereditary Genius Phrase “nature and nurture”

Alfred Binet France Create test to identify children who might have trouble in class Measuring children’s mental age Worried about labels and limiting opportunities

IQ Intelligence quotient Wm Stern Ratio IQ = mental age/chronological age x 100 Average IQ = 100 Not effective for adults

Modern IQ New formula Deviation IQ = individual’s test score/ pretested score x 100 Einstein’s was over 160

Lewis Terman Stanford prof Adopted Binet’s test to measure inherited intelligence Stanford-Binet Measure of scholastic aptitude

David Wechsler Created series of tests Wechsler Intelligence Scales Adults (WAIS) Children (WISC) Preschoolers (WPPSI) Verbal Subscale Performance Subscale Total Test Score CRASH COURSE

Intelligence Tests Achievement Measure what you learn AP exam Aptitude Predict your ability to learn a new skill

Test Construction Good test must be Standardized Reliable Valid Standardization Est. norms from the test results of large representative sample Ensure test is both administered and scored uniformly

Test Construction